/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationWernerOverapprox_32.epf -i ../../../trunk/examples/svcomp/loops/for_bounded_loop1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-24 04:47:05,518 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-24 04:47:05,521 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-24 04:47:05,561 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-24 04:47:05,575 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-24 04:47:05,577 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-24 04:47:05,578 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-24 04:47:05,580 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-24 04:47:05,592 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-24 04:47:05,593 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-24 04:47:05,602 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-24 04:47:05,607 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-24 04:47:05,611 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-24 04:47:05,612 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-24 04:47:05,615 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-24 04:47:05,616 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-24 04:47:05,622 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-24 04:47:05,644 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-24 04:47:05,645 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-24 04:47:05,647 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-24 04:47:05,648 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationWernerOverapprox_32.epf [2021-02-24 04:47:05,667 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-24 04:47:05,667 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-24 04:47:05,672 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-24 04:47:05,672 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-24 04:47:05,672 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-24 04:47:05,673 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-24 04:47:05,673 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-24 04:47:05,673 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-24 04:47:05,673 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-24 04:47:05,673 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-24 04:47:05,674 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-24 04:47:05,675 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-24 04:47:05,675 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-24 04:47:05,675 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-24 04:47:05,675 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-24 04:47:05,676 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-24 04:47:05,676 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-24 04:47:05,676 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-24 04:47:05,676 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-24 04:47:05,676 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-24 04:47:05,677 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-24 04:47:05,677 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-24 04:47:05,677 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX [2021-02-24 04:47:05,677 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-24 04:47:06,109 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-24 04:47:06,159 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-24 04:47:06,163 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-24 04:47:06,164 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-24 04:47:06,165 INFO L275 PluginConnector]: CDTParser initialized [2021-02-24 04:47:06,166 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/for_bounded_loop1.c [2021-02-24 04:47:06,260 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/efcf57800/c34d5f795927447da14dddd10a148864/FLAGfcd6bbb17 [2021-02-24 04:47:06,935 INFO L306 CDTParser]: Found 1 translation units. [2021-02-24 04:47:06,936 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/for_bounded_loop1.c [2021-02-24 04:47:06,944 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/efcf57800/c34d5f795927447da14dddd10a148864/FLAGfcd6bbb17 [2021-02-24 04:47:07,333 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/efcf57800/c34d5f795927447da14dddd10a148864 [2021-02-24 04:47:07,337 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-24 04:47:07,353 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-24 04:47:07,359 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-24 04:47:07,359 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-24 04:47:07,364 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-24 04:47:07,365 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:47:07" (1/1) ... [2021-02-24 04:47:07,366 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7824bedd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:47:07, skipping insertion in model container [2021-02-24 04:47:07,367 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:47:07" (1/1) ... [2021-02-24 04:47:07,376 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-24 04:47:07,397 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-24 04:47:07,616 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/for_bounded_loop1.c[416,429] [2021-02-24 04:47:07,631 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 04:47:07,642 INFO L203 MainTranslator]: Completed pre-run [2021-02-24 04:47:07,659 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/for_bounded_loop1.c[416,429] [2021-02-24 04:47:07,664 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 04:47:07,684 INFO L208 MainTranslator]: Completed translation [2021-02-24 04:47:07,684 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:47:07 WrapperNode [2021-02-24 04:47:07,685 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-24 04:47:07,686 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-24 04:47:07,686 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-24 04:47:07,686 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-24 04:47:07,700 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:47:07" (1/1) ... [2021-02-24 04:47:07,701 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:47:07" (1/1) ... [2021-02-24 04:47:07,709 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:47:07" (1/1) ... [2021-02-24 04:47:07,709 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:47:07" (1/1) ... [2021-02-24 04:47:07,715 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:47:07" (1/1) ... [2021-02-24 04:47:07,720 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:47:07" (1/1) ... [2021-02-24 04:47:07,722 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:47:07" (1/1) ... [2021-02-24 04:47:07,724 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-24 04:47:07,725 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-24 04:47:07,726 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-24 04:47:07,726 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-24 04:47:07,727 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:47:07" (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 04:47:07,832 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-24 04:47:07,833 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-24 04:47:07,833 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-24 04:47:07,833 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-24 04:47:07,833 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-24 04:47:07,833 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-24 04:47:07,834 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-24 04:47:07,834 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-24 04:47:07,834 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-24 04:47:07,834 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-24 04:47:07,834 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-24 04:47:07,835 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-24 04:47:07,835 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-24 04:47:07,835 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-24 04:47:07,835 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-24 04:47:07,835 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-24 04:47:07,835 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-24 04:47:07,836 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-24 04:47:07,836 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-24 04:47:07,836 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-24 04:47:08,154 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-24 04:47:08,154 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-24 04:47:08,157 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:47:08 BoogieIcfgContainer [2021-02-24 04:47:08,157 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-24 04:47:08,160 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-24 04:47:08,160 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-24 04:47:08,164 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-24 04:47:08,164 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 04:47:07" (1/3) ... [2021-02-24 04:47:08,165 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@100ecc2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:47:08, skipping insertion in model container [2021-02-24 04:47:08,166 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:47:07" (2/3) ... [2021-02-24 04:47:08,166 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@100ecc2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:47:08, skipping insertion in model container [2021-02-24 04:47:08,166 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:47:08" (3/3) ... [2021-02-24 04:47:08,169 INFO L111 eAbstractionObserver]: Analyzing ICFG for_bounded_loop1.c [2021-02-24 04:47:08,201 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-24 04:47:08,219 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-24 04:47:08,268 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-24 04:47:08,293 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-24 04:47:08,294 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-24 04:47:08,294 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-24 04:47:08,294 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-24 04:47:08,294 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-24 04:47:08,294 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-24 04:47:08,294 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-24 04:47:08,295 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-24 04:47:08,318 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states. [2021-02-24 04:47:08,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-24 04:47:08,338 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:47:08,339 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] [2021-02-24 04:47:08,340 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:47:08,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:47:08,357 INFO L82 PathProgramCache]: Analyzing trace with hash -478128650, now seen corresponding path program 1 times [2021-02-24 04:47:08,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:47:08,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1300206832] [2021-02-24 04:47:08,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:47:08,467 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:47:08,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:47:08,629 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:08,631 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:47:08,633 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:08,635 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:47:08,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:47:08,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:47:08,813 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:08,814 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:47:08,822 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 04:47:08,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1300206832] [2021-02-24 04:47:08,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:47:08,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-24 04:47:08,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802025564] [2021-02-24 04:47:08,832 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-24 04:47:08,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:47:08,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-24 04:47:08,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-24 04:47:08,849 INFO L87 Difference]: Start difference. First operand 46 states. Second operand 3 states. [2021-02-24 04:47:08,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:47:08,984 INFO L93 Difference]: Finished difference Result 70 states and 84 transitions. [2021-02-24 04:47:08,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-24 04:47:08,987 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2021-02-24 04:47:08,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:47:08,996 INFO L225 Difference]: With dead ends: 70 [2021-02-24 04:47:08,997 INFO L226 Difference]: Without dead ends: 39 [2021-02-24 04:47:09,001 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-24 04:47:09,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-02-24 04:47:09,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-02-24 04:47:09,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-02-24 04:47:09,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2021-02-24 04:47:09,060 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 25 [2021-02-24 04:47:09,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:47:09,061 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2021-02-24 04:47:09,061 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-24 04:47:09,061 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2021-02-24 04:47:09,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-24 04:47:09,062 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:47:09,062 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] [2021-02-24 04:47:09,063 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-24 04:47:09,063 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:47:09,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:47:09,066 INFO L82 PathProgramCache]: Analyzing trace with hash -496599070, now seen corresponding path program 1 times [2021-02-24 04:47:09,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:47:09,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1201808789] [2021-02-24 04:47:09,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:47:09,070 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:47:09,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:47:09,131 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:09,133 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:47:09,135 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:09,137 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:47:09,158 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:09,159 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 04:47:09,174 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:09,175 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:47:09,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:47:09,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:47:09,279 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:09,280 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:47:09,288 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 04:47:09,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1201808789] [2021-02-24 04:47:09,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:47:09,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-24 04:47:09,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624285678] [2021-02-24 04:47:09,292 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-24 04:47:09,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:47:09,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-24 04:47:09,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-02-24 04:47:09,294 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 5 states. [2021-02-24 04:47:09,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:47:09,639 INFO L93 Difference]: Finished difference Result 57 states and 61 transitions. [2021-02-24 04:47:09,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-24 04:47:09,641 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2021-02-24 04:47:09,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:47:09,647 INFO L225 Difference]: With dead ends: 57 [2021-02-24 04:47:09,647 INFO L226 Difference]: Without dead ends: 50 [2021-02-24 04:47:09,651 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-02-24 04:47:09,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-02-24 04:47:09,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 40. [2021-02-24 04:47:09,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-02-24 04:47:09,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2021-02-24 04:47:09,697 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 25 [2021-02-24 04:47:09,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:47:09,697 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2021-02-24 04:47:09,698 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-24 04:47:09,698 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2021-02-24 04:47:09,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-24 04:47:09,704 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:47:09,704 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] [2021-02-24 04:47:09,705 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-24 04:47:09,705 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:47:09,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:47:09,706 INFO L82 PathProgramCache]: Analyzing trace with hash 1797658403, now seen corresponding path program 1 times [2021-02-24 04:47:09,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:47:09,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1990769644] [2021-02-24 04:47:09,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:47:09,713 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:47:09,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:47:09,842 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:09,845 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:47:09,846 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:09,847 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:47:09,857 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:09,859 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 04:47:09,877 WARN L141 QuantifierPusher]: treesize reduction 9, result has 50.0 percent of original size [2021-02-24 04:47:09,879 WARN L147 QuantifierPusher]: treesize reduction 9, result has 50.0 percent of original size 9 [2021-02-24 04:47:09,884 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:09,885 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 04:47:09,895 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:09,896 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 04:47:09,933 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:09,934 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:47:09,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:47:09,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:47:09,994 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:09,995 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:47:09,998 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 04:47:09,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1990769644] [2021-02-24 04:47:09,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:47:09,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-02-24 04:47:09,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265234965] [2021-02-24 04:47:09,999 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-24 04:47:09,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:47:10,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-24 04:47:10,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-02-24 04:47:10,001 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 7 states. [2021-02-24 04:47:10,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:47:10,500 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2021-02-24 04:47:10,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-24 04:47:10,501 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2021-02-24 04:47:10,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:47:10,503 INFO L225 Difference]: With dead ends: 53 [2021-02-24 04:47:10,503 INFO L226 Difference]: Without dead ends: 51 [2021-02-24 04:47:10,504 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-02-24 04:47:10,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-02-24 04:47:10,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 46. [2021-02-24 04:47:10,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-02-24 04:47:10,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2021-02-24 04:47:10,519 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 26 [2021-02-24 04:47:10,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:47:10,519 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2021-02-24 04:47:10,519 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-02-24 04:47:10,519 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2021-02-24 04:47:10,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-02-24 04:47:10,520 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:47:10,521 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1] [2021-02-24 04:47:10,521 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-24 04:47:10,521 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:47:10,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:47:10,522 INFO L82 PathProgramCache]: Analyzing trace with hash -1418508499, now seen corresponding path program 1 times [2021-02-24 04:47:10,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:47:10,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1209596453] [2021-02-24 04:47:10,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:47:10,525 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:47:10,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:47:10,573 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:10,574 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:47:10,575 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:10,576 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:47:10,582 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:10,583 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 04:47:10,596 WARN L141 QuantifierPusher]: treesize reduction 11, result has 54.2 percent of original size [2021-02-24 04:47:10,598 WARN L147 QuantifierPusher]: treesize reduction 11, result has 54.2 percent of original size 13 [2021-02-24 04:47:10,606 WARN L141 QuantifierPusher]: treesize reduction 12, result has 69.2 percent of original size [2021-02-24 04:47:10,607 WARN L147 QuantifierPusher]: treesize reduction 12, result has 69.2 percent of original size 27 [2021-02-24 04:47:10,656 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:10,657 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-24 04:47:10,673 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:10,673 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 04:47:10,685 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:10,686 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 04:47:10,698 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:10,699 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:47:10,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:47:10,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:47:10,759 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:10,760 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:47:10,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-02-24 04:47:10,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:47:10,766 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:10,767 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:47:10,770 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 04:47:10,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1209596453] [2021-02-24 04:47:10,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:47:10,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-02-24 04:47:10,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803884146] [2021-02-24 04:47:10,772 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-24 04:47:10,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:47:10,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-24 04:47:10,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-02-24 04:47:10,773 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 9 states. [2021-02-24 04:47:11,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:47:11,559 INFO L93 Difference]: Finished difference Result 64 states and 67 transitions. [2021-02-24 04:47:11,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-24 04:47:11,560 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 36 [2021-02-24 04:47:11,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:47:11,561 INFO L225 Difference]: With dead ends: 64 [2021-02-24 04:47:11,561 INFO L226 Difference]: Without dead ends: 62 [2021-02-24 04:47:11,562 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-02-24 04:47:11,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-02-24 04:47:11,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 56. [2021-02-24 04:47:11,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2021-02-24 04:47:11,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2021-02-24 04:47:11,579 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 36 [2021-02-24 04:47:11,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:47:11,580 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2021-02-24 04:47:11,580 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-24 04:47:11,580 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2021-02-24 04:47:11,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-02-24 04:47:11,581 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:47:11,582 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 04:47:11,582 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-24 04:47:11,582 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:47:11,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:47:11,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1153665475, now seen corresponding path program 1 times [2021-02-24 04:47:11,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:47:11,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [635582523] [2021-02-24 04:47:11,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:47:11,620 WARN L141 QuantifierPusher]: treesize reduction 10, result has 80.0 percent of original size [2021-02-24 04:47:11,638 WARN L147 QuantifierPusher]: treesize reduction 10, result has 80.0 percent of original size 40 [2021-02-24 04:47:11,646 WARN L141 QuantifierPusher]: treesize reduction 10, result has 80.0 percent of original size [2021-02-24 04:47:11,650 WARN L147 QuantifierPusher]: treesize reduction 10, result has 80.0 percent of original size 40 [2021-02-24 04:47:11,695 WARN L141 QuantifierPusher]: treesize reduction 22, result has 26.7 percent of original size [2021-02-24 04:47:11,705 WARN L147 QuantifierPusher]: treesize reduction 22, result has 26.7 percent of original size 8 [2021-02-24 04:47:11,710 WARN L141 QuantifierPusher]: treesize reduction 10, result has 80.0 percent of original size [2021-02-24 04:47:11,714 WARN L147 QuantifierPusher]: treesize reduction 10, result has 80.0 percent of original size 40 [2021-02-24 04:47:11,716 WARN L141 QuantifierPusher]: treesize reduction 10, result has 80.0 percent of original size [2021-02-24 04:47:11,721 WARN L147 QuantifierPusher]: treesize reduction 10, result has 80.0 percent of original size 40 [2021-02-24 04:47:11,724 WARN L141 QuantifierPusher]: treesize reduction 10, result has 80.0 percent of original size [2021-02-24 04:47:11,729 WARN L147 QuantifierPusher]: treesize reduction 10, result has 80.0 percent of original size 40 [2021-02-24 04:47:11,736 WARN L141 QuantifierPusher]: treesize reduction 2, result has 80.0 percent of original size [2021-02-24 04:47:11,738 WARN L147 QuantifierPusher]: treesize reduction 2, result has 80.0 percent of original size 8 [2021-02-24 04:47:11,741 WARN L141 QuantifierPusher]: treesize reduction 10, result has 80.0 percent of original size [2021-02-24 04:47:11,746 WARN L147 QuantifierPusher]: treesize reduction 10, result has 80.0 percent of original size 40 [2021-02-24 04:47:11,748 WARN L141 QuantifierPusher]: treesize reduction 10, result has 80.0 percent of original size [2021-02-24 04:47:11,752 WARN L147 QuantifierPusher]: treesize reduction 10, result has 80.0 percent of original size 40 [2021-02-24 04:47:11,755 WARN L141 QuantifierPusher]: treesize reduction 10, result has 80.0 percent of original size [2021-02-24 04:47:11,758 WARN L147 QuantifierPusher]: treesize reduction 10, result has 80.0 percent of original size 40 [2021-02-24 04:47:11,765 WARN L141 QuantifierPusher]: treesize reduction 2, result has 80.0 percent of original size [2021-02-24 04:47:11,767 WARN L147 QuantifierPusher]: treesize reduction 2, result has 80.0 percent of original size 8 [2021-02-24 04:47:11,770 WARN L141 QuantifierPusher]: treesize reduction 10, result has 80.0 percent of original size [2021-02-24 04:47:11,773 WARN L147 QuantifierPusher]: treesize reduction 10, result has 80.0 percent of original size 40 [2021-02-24 04:47:11,775 WARN L141 QuantifierPusher]: treesize reduction 10, result has 80.0 percent of original size [2021-02-24 04:47:11,778 WARN L147 QuantifierPusher]: treesize reduction 10, result has 80.0 percent of original size 40 [2021-02-24 04:47:11,781 WARN L141 QuantifierPusher]: treesize reduction 10, result has 80.0 percent of original size [2021-02-24 04:47:11,784 WARN L147 QuantifierPusher]: treesize reduction 10, result has 80.0 percent of original size 40 [2021-02-24 04:47:11,826 WARN L141 QuantifierPusher]: treesize reduction 4, result has 86.7 percent of original size [2021-02-24 04:47:11,831 INFO L723 QuantifierPusher]: Distributing 5 disjuncts over 3 conjuncts [2021-02-24 04:47:11,841 INFO L730 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:11,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-24 04:47:11,845 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:47:11,854 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 58 [2021-02-24 04:47:11,860 WARN L147 QuantifierPusher]: treesize reduction 4, result has 86.7 percent of original size 26 [2021-02-24 04:47:11,868 WARN L141 QuantifierPusher]: treesize reduction 10, result has 88.1 percent of original size [2021-02-24 04:47:11,884 WARN L147 QuantifierPusher]: treesize reduction 10, result has 88.1 percent of original size 74 [2021-02-24 04:47:11,885 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-24 04:47:11,912 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2021-02-24 04:47:11,912 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-24 04:47:11,916 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-24 04:47:11,936 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-02-24 04:47:11,937 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.02 04:47:11 BoogieIcfgContainer [2021-02-24 04:47:11,937 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-24 04:47:11,938 INFO L168 Benchmark]: Toolchain (without parser) took 4598.32 ms. Allocated memory was 151.0 MB in the beginning and 198.2 MB in the end (delta: 47.2 MB). Free memory was 127.2 MB in the beginning and 117.8 MB in the end (delta: 9.4 MB). Peak memory consumption was 57.6 MB. Max. memory is 8.0 GB. [2021-02-24 04:47:11,939 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 151.0 MB. Free memory is still 125.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-24 04:47:11,940 INFO L168 Benchmark]: CACSL2BoogieTranslator took 326.48 ms. Allocated memory is still 151.0 MB. Free memory was 126.2 MB in the beginning and 116.6 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-24 04:47:11,940 INFO L168 Benchmark]: Boogie Preprocessor took 38.38 ms. Allocated memory is still 151.0 MB. Free memory was 116.6 MB in the beginning and 115.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-24 04:47:11,941 INFO L168 Benchmark]: RCFGBuilder took 431.96 ms. Allocated memory is still 151.0 MB. Free memory was 115.1 MB in the beginning and 131.6 MB in the end (delta: -16.5 MB). Peak memory consumption was 18.6 MB. Max. memory is 8.0 GB. [2021-02-24 04:47:11,942 INFO L168 Benchmark]: TraceAbstraction took 3777.30 ms. Allocated memory was 151.0 MB in the beginning and 198.2 MB in the end (delta: 47.2 MB). Free memory was 131.1 MB in the beginning and 117.8 MB in the end (delta: 13.3 MB). Peak memory consumption was 61.0 MB. Max. memory is 8.0 GB. [2021-02-24 04:47:11,945 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 151.0 MB. Free memory is still 125.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 326.48 ms. Allocated memory is still 151.0 MB. Free memory was 126.2 MB in the beginning and 116.6 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 38.38 ms. Allocated memory is still 151.0 MB. Free memory was 116.6 MB in the beginning and 115.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 431.96 ms. Allocated memory is still 151.0 MB. Free memory was 115.1 MB in the beginning and 131.6 MB in the end (delta: -16.5 MB). Peak memory consumption was 18.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3777.30 ms. Allocated memory was 151.0 MB in the beginning and 198.2 MB in the end (delta: 47.2 MB). Free memory was 131.1 MB in the beginning and 117.8 MB in the end (delta: 13.3 MB). Peak memory consumption was 61.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 11]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L19] int i=0, x=0, y=0; [L20] int n=__VERIFIER_nondet_int(); [L21] COND FALSE !(!(n>0)) [L22] i=0 [L22] COND TRUE i