/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/loop-invgen/apache-get-tag.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-24 04:48:22,608 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-24 04:48:22,610 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-24 04:48:22,645 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-24 04:48:22,646 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-24 04:48:22,647 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-24 04:48:22,649 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-24 04:48:22,651 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-24 04:48:22,654 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-24 04:48:22,655 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-24 04:48:22,656 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-24 04:48:22,658 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-24 04:48:22,658 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-24 04:48:22,659 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-24 04:48:22,661 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-24 04:48:22,662 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-24 04:48:22,663 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-24 04:48:22,664 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-24 04:48:22,666 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-24 04:48:22,669 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-24 04:48:22,670 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-24 04:48:22,673 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-24 04:48:22,674 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-24 04:48:22,676 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-24 04:48:22,685 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-24 04:48:22,706 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-24 04:48:22,708 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-24 04:48:22,709 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-24 04:48:22,710 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 04:48:22,730 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-24 04:48:22,731 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-24 04:48:22,736 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-24 04:48:22,736 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-24 04:48:22,736 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-24 04:48:22,736 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-24 04:48:22,737 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-24 04:48:22,737 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-24 04:48:22,737 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-24 04:48:22,737 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-24 04:48:22,739 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-24 04:48:22,739 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-24 04:48:22,739 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-24 04:48:22,739 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-24 04:48:22,740 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-24 04:48:22,740 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-24 04:48:22,740 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-24 04:48:22,740 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-24 04:48:22,740 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-24 04:48:22,741 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-24 04:48:22,741 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-24 04:48:22,741 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-24 04:48:22,741 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX [2021-02-24 04:48:22,741 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-24 04:48:23,207 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-24 04:48:23,231 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-24 04:48:23,235 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-24 04:48:23,236 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-24 04:48:23,243 INFO L275 PluginConnector]: CDTParser initialized [2021-02-24 04:48:23,244 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/apache-get-tag.i [2021-02-24 04:48:23,339 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b37e7686e/e8d9dea1c9eb4ab2a688532d80f8e763/FLAG1e505ff54 [2021-02-24 04:48:23,970 INFO L306 CDTParser]: Found 1 translation units. [2021-02-24 04:48:23,971 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/apache-get-tag.i [2021-02-24 04:48:23,982 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b37e7686e/e8d9dea1c9eb4ab2a688532d80f8e763/FLAG1e505ff54 [2021-02-24 04:48:24,282 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b37e7686e/e8d9dea1c9eb4ab2a688532d80f8e763 [2021-02-24 04:48:24,286 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-24 04:48:24,299 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-24 04:48:24,301 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-24 04:48:24,301 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-24 04:48:24,305 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-24 04:48:24,306 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:48:24" (1/1) ... [2021-02-24 04:48:24,307 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31c51d04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:48:24, skipping insertion in model container [2021-02-24 04:48:24,308 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:48:24" (1/1) ... [2021-02-24 04:48:24,317 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-24 04:48:24,337 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-24 04:48:24,502 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/apache-get-tag.i[893,906] [2021-02-24 04:48:24,523 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 04:48:24,535 INFO L203 MainTranslator]: Completed pre-run [2021-02-24 04:48:24,552 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/apache-get-tag.i[893,906] [2021-02-24 04:48:24,562 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 04:48:24,583 INFO L208 MainTranslator]: Completed translation [2021-02-24 04:48:24,584 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:48:24 WrapperNode [2021-02-24 04:48:24,584 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-24 04:48:24,586 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-24 04:48:24,586 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-24 04:48:24,586 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-24 04:48:24,602 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:48:24" (1/1) ... [2021-02-24 04:48:24,603 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:48:24" (1/1) ... [2021-02-24 04:48:24,613 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:48:24" (1/1) ... [2021-02-24 04:48:24,613 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:48:24" (1/1) ... [2021-02-24 04:48:24,621 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:48:24" (1/1) ... [2021-02-24 04:48:24,633 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:48:24" (1/1) ... [2021-02-24 04:48:24,636 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:48:24" (1/1) ... [2021-02-24 04:48:24,641 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-24 04:48:24,643 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-24 04:48:24,643 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-24 04:48:24,644 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-24 04:48:24,648 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:48:24" (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 04:48:24,782 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-24 04:48:24,783 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-24 04:48:24,783 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-24 04:48:24,783 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-24 04:48:24,784 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-24 04:48:24,784 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-24 04:48:24,784 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-24 04:48:24,784 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-24 04:48:24,785 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-02-24 04:48:24,785 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-02-24 04:48:24,785 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-24 04:48:24,785 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-24 04:48:24,785 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-24 04:48:24,785 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-24 04:48:24,786 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-24 04:48:24,786 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-24 04:48:24,786 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-24 04:48:24,786 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-24 04:48:24,786 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-24 04:48:24,787 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-24 04:48:24,787 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-24 04:48:24,787 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-24 04:48:25,327 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-24 04:48:25,328 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-02-24 04:48:25,330 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:48:25 BoogieIcfgContainer [2021-02-24 04:48:25,330 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-24 04:48:25,334 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-24 04:48:25,334 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-24 04:48:25,338 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-24 04:48:25,340 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 04:48:24" (1/3) ... [2021-02-24 04:48:25,342 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dc0b016 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:48:25, skipping insertion in model container [2021-02-24 04:48:25,342 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:48:24" (2/3) ... [2021-02-24 04:48:25,343 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dc0b016 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:48:25, skipping insertion in model container [2021-02-24 04:48:25,343 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:48:25" (3/3) ... [2021-02-24 04:48:25,346 INFO L111 eAbstractionObserver]: Analyzing ICFG apache-get-tag.i [2021-02-24 04:48:25,357 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-24 04:48:25,363 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-24 04:48:25,388 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-24 04:48:25,428 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-24 04:48:25,429 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-24 04:48:25,429 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-24 04:48:25,430 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-24 04:48:25,430 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-24 04:48:25,430 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-24 04:48:25,430 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-24 04:48:25,430 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-24 04:48:25,459 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states. [2021-02-24 04:48:25,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-24 04:48:25,476 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:48:25,477 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 04:48:25,477 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:48:25,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:48:25,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1183090698, now seen corresponding path program 1 times [2021-02-24 04:48:25,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:48:25,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [730687072] [2021-02-24 04:48:25,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:48:25,617 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:48:25,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:48:25,829 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:25,832 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:48:25,834 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:25,836 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:48:25,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:48:25,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:48:25,976 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:25,977 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:48:25,988 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 04:48:25,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [730687072] [2021-02-24 04:48:25,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:48:25,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-24 04:48:25,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912501823] [2021-02-24 04:48:26,005 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-24 04:48:26,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:48:26,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-24 04:48:26,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-24 04:48:26,025 INFO L87 Difference]: Start difference. First operand 82 states. Second operand 3 states. [2021-02-24 04:48:26,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:48:26,368 INFO L93 Difference]: Finished difference Result 142 states and 211 transitions. [2021-02-24 04:48:26,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-24 04:48:26,371 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2021-02-24 04:48:26,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:48:26,382 INFO L225 Difference]: With dead ends: 142 [2021-02-24 04:48:26,382 INFO L226 Difference]: Without dead ends: 76 [2021-02-24 04:48:26,388 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 04:48:26,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-02-24 04:48:26,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2021-02-24 04:48:26,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2021-02-24 04:48:26,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 94 transitions. [2021-02-24 04:48:26,469 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 94 transitions. Word has length 26 [2021-02-24 04:48:26,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:48:26,469 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 94 transitions. [2021-02-24 04:48:26,469 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-24 04:48:26,470 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 94 transitions. [2021-02-24 04:48:26,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-24 04:48:26,471 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:48:26,471 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] [2021-02-24 04:48:26,471 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-24 04:48:26,472 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:48:26,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:48:26,473 INFO L82 PathProgramCache]: Analyzing trace with hash -2035797628, now seen corresponding path program 1 times [2021-02-24 04:48:26,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:48:26,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2006992095] [2021-02-24 04:48:26,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:48:26,484 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:48:26,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:48:26,604 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:26,607 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:48:26,620 WARN L141 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size [2021-02-24 04:48:26,623 WARN L147 QuantifierPusher]: treesize reduction 4, result has 42.9 percent of original size 3 [2021-02-24 04:48:26,628 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:26,629 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 04:48:26,635 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:26,635 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 04:48:26,642 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:26,643 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:48:26,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:48:26,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:48:26,694 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:26,695 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:48:26,697 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 04:48:26,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2006992095] [2021-02-24 04:48:26,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:48:26,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-24 04:48:26,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4604478] [2021-02-24 04:48:26,699 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-24 04:48:26,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:48:26,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-24 04:48:26,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-24 04:48:26,701 INFO L87 Difference]: Start difference. First operand 76 states and 94 transitions. Second operand 6 states. [2021-02-24 04:48:27,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:48:27,279 INFO L93 Difference]: Finished difference Result 98 states and 122 transitions. [2021-02-24 04:48:27,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-24 04:48:27,280 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2021-02-24 04:48:27,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:48:27,282 INFO L225 Difference]: With dead ends: 98 [2021-02-24 04:48:27,283 INFO L226 Difference]: Without dead ends: 96 [2021-02-24 04:48:27,285 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-02-24 04:48:27,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-02-24 04:48:27,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 89. [2021-02-24 04:48:27,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2021-02-24 04:48:27,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 111 transitions. [2021-02-24 04:48:27,320 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 111 transitions. Word has length 27 [2021-02-24 04:48:27,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:48:27,320 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 111 transitions. [2021-02-24 04:48:27,320 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-24 04:48:27,321 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 111 transitions. [2021-02-24 04:48:27,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-24 04:48:27,322 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:48:27,322 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] [2021-02-24 04:48:27,323 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-24 04:48:27,323 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:48:27,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:48:27,324 INFO L82 PathProgramCache]: Analyzing trace with hash 836322033, now seen corresponding path program 1 times [2021-02-24 04:48:27,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:48:27,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1507502887] [2021-02-24 04:48:27,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:48:27,328 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:48:27,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:48:27,380 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:27,381 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:48:27,382 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:27,382 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:48:27,389 WARN L141 QuantifierPusher]: treesize reduction 9, result has 69.0 percent of original size [2021-02-24 04:48:27,391 WARN L147 QuantifierPusher]: treesize reduction 9, result has 69.0 percent of original size 20 [2021-02-24 04:48:27,416 WARN L141 QuantifierPusher]: treesize reduction 4, result has 73.3 percent of original size [2021-02-24 04:48:27,417 WARN L147 QuantifierPusher]: treesize reduction 4, result has 73.3 percent of original size 11 [2021-02-24 04:48:27,428 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:27,429 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 04:48:27,436 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:27,437 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 04:48:27,445 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:27,445 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:48:27,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:48:27,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:48:27,480 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:27,481 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:48:27,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-02-24 04:48:27,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:48:27,487 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:27,488 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:48:27,491 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 04:48:27,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1507502887] [2021-02-24 04:48:27,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:48:27,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-24 04:48:27,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499112045] [2021-02-24 04:48:27,492 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-24 04:48:27,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:48:27,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-24 04:48:27,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-02-24 04:48:27,493 INFO L87 Difference]: Start difference. First operand 89 states and 111 transitions. Second operand 8 states. [2021-02-24 04:48:28,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:48:28,087 INFO L93 Difference]: Finished difference Result 102 states and 125 transitions. [2021-02-24 04:48:28,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-24 04:48:28,088 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2021-02-24 04:48:28,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:48:28,090 INFO L225 Difference]: With dead ends: 102 [2021-02-24 04:48:28,090 INFO L226 Difference]: Without dead ends: 91 [2021-02-24 04:48:28,091 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-02-24 04:48:28,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-02-24 04:48:28,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 85. [2021-02-24 04:48:28,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2021-02-24 04:48:28,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 102 transitions. [2021-02-24 04:48:28,114 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 102 transitions. Word has length 32 [2021-02-24 04:48:28,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:48:28,114 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 102 transitions. [2021-02-24 04:48:28,114 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-24 04:48:28,114 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 102 transitions. [2021-02-24 04:48:28,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-24 04:48:28,116 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:48:28,116 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] [2021-02-24 04:48:28,116 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-24 04:48:28,117 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:48:28,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:48:28,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1034410599, now seen corresponding path program 1 times [2021-02-24 04:48:28,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:48:28,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [986734306] [2021-02-24 04:48:28,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:48:28,120 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:48:28,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:48:28,189 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:28,190 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:48:28,191 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:28,192 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:48:28,197 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:28,198 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 04:48:28,216 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:28,217 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 04:48:28,226 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:28,227 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 04:48:28,233 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:28,234 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 04:48:28,241 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:28,242 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:48:28,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:48:28,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:48:28,273 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:28,273 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:48:28,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-02-24 04:48:28,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:48:28,280 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:28,281 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:48:28,284 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 04:48:28,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [986734306] [2021-02-24 04:48:28,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:48:28,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-24 04:48:28,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755670123] [2021-02-24 04:48:28,286 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-24 04:48:28,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:48:28,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-24 04:48:28,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-02-24 04:48:28,287 INFO L87 Difference]: Start difference. First operand 85 states and 102 transitions. Second operand 8 states. [2021-02-24 04:48:28,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:48:28,841 INFO L93 Difference]: Finished difference Result 97 states and 115 transitions. [2021-02-24 04:48:28,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-24 04:48:28,841 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 35 [2021-02-24 04:48:28,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:48:28,843 INFO L225 Difference]: With dead ends: 97 [2021-02-24 04:48:28,843 INFO L226 Difference]: Without dead ends: 95 [2021-02-24 04:48:28,844 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-02-24 04:48:28,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-02-24 04:48:28,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 91. [2021-02-24 04:48:28,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2021-02-24 04:48:28,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 109 transitions. [2021-02-24 04:48:28,867 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 109 transitions. Word has length 35 [2021-02-24 04:48:28,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:48:28,867 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 109 transitions. [2021-02-24 04:48:28,867 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-24 04:48:28,868 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 109 transitions. [2021-02-24 04:48:28,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-02-24 04:48:28,869 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:48:28,870 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 04:48:28,870 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-24 04:48:28,870 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:48:28,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:48:28,871 INFO L82 PathProgramCache]: Analyzing trace with hash 1264498093, now seen corresponding path program 1 times [2021-02-24 04:48:28,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:48:28,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1741768631] [2021-02-24 04:48:28,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:48:28,874 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:48:28,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:48:28,908 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:28,908 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:48:28,909 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:28,909 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:48:28,913 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:28,913 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:48:28,918 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:28,918 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:48:28,924 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:28,925 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 04:48:28,931 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:28,932 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 04:48:28,939 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:28,939 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:48:28,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:48:28,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:48:28,968 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:28,969 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:48:28,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-02-24 04:48:28,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:48:28,974 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:28,975 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:48:28,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-02-24 04:48:28,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:48:28,980 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:28,980 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:48:28,984 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 04:48:28,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1741768631] [2021-02-24 04:48:28,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:48:28,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-24 04:48:28,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27172656] [2021-02-24 04:48:28,986 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-24 04:48:28,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:48:28,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-24 04:48:28,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-02-24 04:48:28,987 INFO L87 Difference]: Start difference. First operand 91 states and 109 transitions. Second operand 8 states. [2021-02-24 04:48:29,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:48:29,614 INFO L93 Difference]: Finished difference Result 127 states and 153 transitions. [2021-02-24 04:48:29,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-24 04:48:29,614 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 45 [2021-02-24 04:48:29,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:48:29,616 INFO L225 Difference]: With dead ends: 127 [2021-02-24 04:48:29,616 INFO L226 Difference]: Without dead ends: 124 [2021-02-24 04:48:29,618 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-02-24 04:48:29,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-02-24 04:48:29,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 115. [2021-02-24 04:48:29,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2021-02-24 04:48:29,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 138 transitions. [2021-02-24 04:48:29,646 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 138 transitions. Word has length 45 [2021-02-24 04:48:29,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:48:29,646 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 138 transitions. [2021-02-24 04:48:29,646 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-24 04:48:29,647 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 138 transitions. [2021-02-24 04:48:29,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-02-24 04:48:29,648 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:48:29,648 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 04:48:29,648 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-24 04:48:29,649 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:48:29,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:48:29,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1741298737, now seen corresponding path program 1 times [2021-02-24 04:48:29,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:48:29,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [11124982] [2021-02-24 04:48:29,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:48:29,687 WARN L141 QuantifierPusher]: treesize reduction 26, result has 3.7 percent of original size [2021-02-24 04:48:29,688 WARN L147 QuantifierPusher]: treesize reduction 26, result has 3.7 percent of original size 1 [2021-02-24 04:48:29,695 WARN L141 QuantifierPusher]: treesize reduction 26, result has 3.7 percent of original size [2021-02-24 04:48:29,696 WARN L147 QuantifierPusher]: treesize reduction 26, result has 3.7 percent of original size 1 [2021-02-24 04:48:29,713 WARN L141 QuantifierPusher]: treesize reduction 2, result has 80.0 percent of original size [2021-02-24 04:48:29,779 WARN L147 QuantifierPusher]: treesize reduction 2, result has 80.0 percent of original size 8 [2021-02-24 04:48:29,788 WARN L141 QuantifierPusher]: treesize reduction 8, result has 75.0 percent of original size [2021-02-24 04:48:29,794 WARN L147 QuantifierPusher]: treesize reduction 8, result has 75.0 percent of original size 24 [2021-02-24 04:48:29,799 WARN L141 QuantifierPusher]: treesize reduction 11, result has 59.3 percent of original size [2021-02-24 04:48:29,801 WARN L147 QuantifierPusher]: treesize reduction 11, result has 59.3 percent of original size 16 [2021-02-24 04:48:29,803 WARN L141 QuantifierPusher]: treesize reduction 11, result has 59.3 percent of original size [2021-02-24 04:48:29,805 WARN L147 QuantifierPusher]: treesize reduction 11, result has 59.3 percent of original size 16 [2021-02-24 04:48:29,823 WARN L141 QuantifierPusher]: treesize reduction 6, result has 78.6 percent of original size [2021-02-24 04:48:29,830 INFO L723 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2021-02-24 04:48:29,835 INFO L730 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:29,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-24 04:48:29,838 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:29,844 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 38 [2021-02-24 04:48:29,848 WARN L147 QuantifierPusher]: treesize reduction 6, result has 78.6 percent of original size 22 [2021-02-24 04:48:29,852 WARN L141 QuantifierPusher]: treesize reduction 8, result has 84.6 percent of original size [2021-02-24 04:48:29,855 WARN L147 QuantifierPusher]: treesize reduction 8, result has 84.6 percent of original size 44 [2021-02-24 04:48:29,856 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-24 04:48:29,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:48:29,886 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:29,887 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:48:29,888 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:29,888 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:48:29,891 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:29,892 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:48:29,896 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:29,897 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:48:29,898 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:29,898 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 04:48:29,903 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:29,904 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 04:48:29,912 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:29,913 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:48:29,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:48:29,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:48:29,947 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:29,948 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:48:29,951 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 04:48:29,956 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:29,959 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-02-24 04:48:29,964 WARN L141 QuantifierPusher]: treesize reduction 7, result has 82.9 percent of original size [2021-02-24 04:48:29,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-24 04:48:29,970 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:29,972 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-02-24 04:48:29,974 WARN L147 QuantifierPusher]: treesize reduction 7, result has 82.9 percent of original size 34 [2021-02-24 04:48:30,006 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:30,007 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:48:30,008 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:30,009 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-24 04:48:30,021 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:30,025 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-24 04:48:30,042 WARN L141 QuantifierPusher]: treesize reduction 8, result has 57.9 percent of original size [2021-02-24 04:48:30,043 WARN L147 QuantifierPusher]: treesize reduction 8, result has 57.9 percent of original size 11 [2021-02-24 04:48:30,060 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:30,063 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-24 04:48:30,068 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:30,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-24 04:48:30,072 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:30,072 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 04:48:30,073 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-24 04:48:30,090 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:30,091 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-24 04:48:30,106 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:30,107 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-24 04:48:30,124 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:30,125 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-24 04:48:30,138 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:30,139 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-24 04:48:30,140 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:30,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-24 04:48:30,142 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:30,142 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 04:48:30,143 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-02-24 04:48:30,150 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:30,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-24 04:48:30,152 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:30,153 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-24 04:48:30,153 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-24 04:48:30,172 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:30,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-24 04:48:30,175 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:30,175 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-24 04:48:30,176 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-24 04:48:30,197 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:30,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-24 04:48:30,199 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:30,200 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-24 04:48:30,201 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-24 04:48:30,223 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:30,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-24 04:48:30,227 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:30,228 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-24 04:48:30,229 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-02-24 04:48:30,257 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:30,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-24 04:48:30,260 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:30,260 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-24 04:48:30,261 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-02-24 04:48:30,263 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:30,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-24 04:48:30,268 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:30,269 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-02-24 04:48:30,270 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 30 [2021-02-24 04:48:30,300 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:30,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-24 04:48:30,303 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:30,304 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-02-24 04:48:30,304 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-02-24 04:48:30,335 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:30,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-24 04:48:30,339 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:30,340 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-02-24 04:48:30,341 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-02-24 04:48:30,387 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:30,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-24 04:48:30,392 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:30,393 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-02-24 04:48:30,393 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-02-24 04:48:30,431 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:30,432 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:48:30,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [11124982] [2021-02-24 04:48:30,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:48:30,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-02-24 04:48:30,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264508550] [2021-02-24 04:48:30,433 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-24 04:48:30,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:48:30,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-24 04:48:30,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-02-24 04:48:30,435 INFO L87 Difference]: Start difference. First operand 115 states and 138 transitions. Second operand 19 states. [2021-02-24 04:48:32,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:48:32,162 INFO L93 Difference]: Finished difference Result 136 states and 164 transitions. [2021-02-24 04:48:32,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-24 04:48:32,163 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 45 [2021-02-24 04:48:32,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:48:32,167 INFO L225 Difference]: With dead ends: 136 [2021-02-24 04:48:32,167 INFO L226 Difference]: Without dead ends: 133 [2021-02-24 04:48:32,168 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=245, Invalid=1237, Unknown=0, NotChecked=0, Total=1482 [2021-02-24 04:48:32,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-02-24 04:48:32,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2021-02-24 04:48:32,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2021-02-24 04:48:32,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 159 transitions. [2021-02-24 04:48:32,204 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 159 transitions. Word has length 45 [2021-02-24 04:48:32,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:48:32,204 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 159 transitions. [2021-02-24 04:48:32,205 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-02-24 04:48:32,205 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 159 transitions. [2021-02-24 04:48:32,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-02-24 04:48:32,207 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:48:32,207 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 04:48:32,208 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-24 04:48:32,208 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:48:32,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:48:32,208 INFO L82 PathProgramCache]: Analyzing trace with hash -569512649, now seen corresponding path program 1 times [2021-02-24 04:48:32,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:48:32,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [719839541] [2021-02-24 04:48:32,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:48:32,211 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:48:32,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:48:32,279 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:32,279 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:48:32,280 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:32,280 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:48:32,284 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:32,284 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-24 04:48:32,300 WARN L141 QuantifierPusher]: treesize reduction 9, result has 71.0 percent of original size [2021-02-24 04:48:32,301 WARN L147 QuantifierPusher]: treesize reduction 9, result has 71.0 percent of original size 22 [2021-02-24 04:48:32,320 WARN L141 QuantifierPusher]: treesize reduction 5, result has 72.2 percent of original size [2021-02-24 04:48:32,322 WARN L147 QuantifierPusher]: treesize reduction 5, result has 72.2 percent of original size 13 [2021-02-24 04:48:32,327 WARN L141 QuantifierPusher]: treesize reduction 5, result has 72.2 percent of original size [2021-02-24 04:48:32,328 WARN L147 QuantifierPusher]: treesize reduction 5, result has 72.2 percent of original size 13 [2021-02-24 04:48:32,341 WARN L141 QuantifierPusher]: treesize reduction 10, result has 63.0 percent of original size [2021-02-24 04:48:32,349 WARN L147 QuantifierPusher]: treesize reduction 10, result has 63.0 percent of original size 17 [2021-02-24 04:48:32,369 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:32,369 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 04:48:32,376 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:32,376 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 04:48:32,385 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:32,386 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:48:32,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:48:32,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:48:32,413 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:32,414 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:48:32,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-02-24 04:48:32,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:48:32,418 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:32,419 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:48:32,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-02-24 04:48:32,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:48:32,424 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:32,424 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:48:32,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-02-24 04:48:32,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:48:32,429 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:32,430 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:48:32,436 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 04:48:32,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [719839541] [2021-02-24 04:48:32,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:48:32,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-02-24 04:48:32,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165343214] [2021-02-24 04:48:32,437 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-24 04:48:32,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:48:32,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-24 04:48:32,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-02-24 04:48:32,439 INFO L87 Difference]: Start difference. First operand 133 states and 159 transitions. Second operand 10 states. [2021-02-24 04:48:33,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:48:33,248 INFO L93 Difference]: Finished difference Result 146 states and 173 transitions. [2021-02-24 04:48:33,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-24 04:48:33,249 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 56 [2021-02-24 04:48:33,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:48:33,253 INFO L225 Difference]: With dead ends: 146 [2021-02-24 04:48:33,253 INFO L226 Difference]: Without dead ends: 141 [2021-02-24 04:48:33,255 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-02-24 04:48:33,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-02-24 04:48:33,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 137. [2021-02-24 04:48:33,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2021-02-24 04:48:33,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 162 transitions. [2021-02-24 04:48:33,312 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 162 transitions. Word has length 56 [2021-02-24 04:48:33,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:48:33,312 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 162 transitions. [2021-02-24 04:48:33,312 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-02-24 04:48:33,312 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 162 transitions. [2021-02-24 04:48:33,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-02-24 04:48:33,321 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:48:33,322 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 04:48:33,322 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-24 04:48:33,322 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:48:33,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:48:33,324 INFO L82 PathProgramCache]: Analyzing trace with hash 1069428506, now seen corresponding path program 1 times [2021-02-24 04:48:33,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:48:33,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [688387958] [2021-02-24 04:48:33,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:48:33,336 WARN L141 QuantifierPusher]: treesize reduction 26, result has 3.7 percent of original size [2021-02-24 04:48:33,337 WARN L147 QuantifierPusher]: treesize reduction 26, result has 3.7 percent of original size 1 [2021-02-24 04:48:33,338 WARN L141 QuantifierPusher]: treesize reduction 26, result has 3.7 percent of original size [2021-02-24 04:48:33,338 WARN L147 QuantifierPusher]: treesize reduction 26, result has 3.7 percent of original size 1 [2021-02-24 04:48:33,340 WARN L141 QuantifierPusher]: treesize reduction 2, result has 80.0 percent of original size [2021-02-24 04:48:33,344 WARN L147 QuantifierPusher]: treesize reduction 2, result has 80.0 percent of original size 8 [2021-02-24 04:48:33,348 WARN L141 QuantifierPusher]: treesize reduction 8, result has 75.0 percent of original size [2021-02-24 04:48:33,350 WARN L147 QuantifierPusher]: treesize reduction 8, result has 75.0 percent of original size 24 [2021-02-24 04:48:33,354 WARN L141 QuantifierPusher]: treesize reduction 11, result has 59.3 percent of original size [2021-02-24 04:48:33,355 WARN L147 QuantifierPusher]: treesize reduction 11, result has 59.3 percent of original size 16 [2021-02-24 04:48:33,358 WARN L141 QuantifierPusher]: treesize reduction 11, result has 59.3 percent of original size [2021-02-24 04:48:33,360 WARN L147 QuantifierPusher]: treesize reduction 11, result has 59.3 percent of original size 16 [2021-02-24 04:48:33,367 WARN L141 QuantifierPusher]: treesize reduction 6, result has 78.6 percent of original size [2021-02-24 04:48:33,372 INFO L723 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2021-02-24 04:48:33,374 INFO L730 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:33,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-24 04:48:33,375 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:33,394 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 38 [2021-02-24 04:48:33,396 WARN L147 QuantifierPusher]: treesize reduction 6, result has 78.6 percent of original size 22 [2021-02-24 04:48:33,398 WARN L141 QuantifierPusher]: treesize reduction 8, result has 84.6 percent of original size [2021-02-24 04:48:33,402 WARN L147 QuantifierPusher]: treesize reduction 8, result has 84.6 percent of original size 44 [2021-02-24 04:48:33,405 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-24 04:48:33,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:48:33,473 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:33,474 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:48:33,475 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:33,476 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:48:33,479 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:33,479 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:48:33,483 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:33,483 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:48:33,485 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:33,489 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:48:33,494 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:33,495 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:48:33,500 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:33,501 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 04:48:33,506 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:33,507 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 04:48:33,514 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:33,516 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:48:33,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:48:33,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:48:33,556 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:33,557 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:48:33,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-02-24 04:48:33,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:48:33,563 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:33,564 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:48:33,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-02-24 04:48:33,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:48:33,568 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:33,568 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:48:33,571 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-02-24 04:48:33,572 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:33,573 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-02-24 04:48:33,575 WARN L141 QuantifierPusher]: treesize reduction 7, result has 82.9 percent of original size [2021-02-24 04:48:33,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-24 04:48:33,577 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:33,578 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-02-24 04:48:33,580 WARN L147 QuantifierPusher]: treesize reduction 7, result has 82.9 percent of original size 34 [2021-02-24 04:48:33,604 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:33,605 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:48:33,605 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:33,606 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-24 04:48:33,618 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:33,619 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-24 04:48:33,637 WARN L141 QuantifierPusher]: treesize reduction 8, result has 57.9 percent of original size [2021-02-24 04:48:33,639 WARN L147 QuantifierPusher]: treesize reduction 8, result has 57.9 percent of original size 11 [2021-02-24 04:48:33,661 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:33,663 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-24 04:48:33,664 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:33,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-24 04:48:33,666 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:33,666 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 04:48:33,667 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-24 04:48:33,684 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:33,685 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-24 04:48:33,699 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:33,700 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-24 04:48:33,717 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:33,718 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-24 04:48:33,735 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:33,742 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-24 04:48:33,743 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:33,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-24 04:48:33,745 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:33,745 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 04:48:33,746 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-02-24 04:48:33,751 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:33,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-24 04:48:33,754 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:33,755 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-24 04:48:33,756 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-24 04:48:33,779 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:33,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-24 04:48:33,781 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:33,783 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-24 04:48:33,783 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-24 04:48:33,807 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:33,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-24 04:48:33,810 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:33,811 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-24 04:48:33,811 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-02-24 04:48:33,839 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:33,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-24 04:48:33,844 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:33,845 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-24 04:48:33,847 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-02-24 04:48:33,875 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:33,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-24 04:48:33,876 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:33,877 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-24 04:48:33,878 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-02-24 04:48:33,880 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:33,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-24 04:48:33,884 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:33,885 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-02-24 04:48:33,886 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 30 [2021-02-24 04:48:33,918 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:33,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-24 04:48:33,920 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:33,921 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-02-24 04:48:33,921 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-02-24 04:48:33,950 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:33,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-24 04:48:33,954 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:33,955 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-02-24 04:48:33,955 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-02-24 04:48:33,987 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:33,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-24 04:48:33,990 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:33,990 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-02-24 04:48:33,991 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 34 [2021-02-24 04:48:34,029 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:34,029 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:48:34,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [688387958] [2021-02-24 04:48:34,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:48:34,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-02-24 04:48:34,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182678275] [2021-02-24 04:48:34,031 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-24 04:48:34,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:48:34,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-24 04:48:34,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-02-24 04:48:34,032 INFO L87 Difference]: Start difference. First operand 137 states and 162 transitions. Second operand 21 states. [2021-02-24 04:48:36,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:48:36,393 INFO L93 Difference]: Finished difference Result 166 states and 200 transitions. [2021-02-24 04:48:36,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-24 04:48:36,394 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 63 [2021-02-24 04:48:36,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:48:36,397 INFO L225 Difference]: With dead ends: 166 [2021-02-24 04:48:36,397 INFO L226 Difference]: Without dead ends: 163 [2021-02-24 04:48:36,399 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=312, Invalid=1758, Unknown=0, NotChecked=0, Total=2070 [2021-02-24 04:48:36,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-02-24 04:48:36,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 154. [2021-02-24 04:48:36,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2021-02-24 04:48:36,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 185 transitions. [2021-02-24 04:48:36,430 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 185 transitions. Word has length 63 [2021-02-24 04:48:36,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:48:36,430 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 185 transitions. [2021-02-24 04:48:36,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-02-24 04:48:36,430 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 185 transitions. [2021-02-24 04:48:36,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-02-24 04:48:36,432 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:48:36,432 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 04:48:36,432 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-02-24 04:48:36,432 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:48:36,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:48:36,433 INFO L82 PathProgramCache]: Analyzing trace with hash 752235094, now seen corresponding path program 1 times [2021-02-24 04:48:36,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:48:36,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2042341816] [2021-02-24 04:48:36,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:48:36,436 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:48:36,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:48:36,467 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:36,468 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:48:36,468 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:36,469 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:48:36,472 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:36,472 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:48:36,476 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:36,477 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:48:36,477 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:36,478 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:48:36,482 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:36,483 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 04:48:36,488 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:36,488 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 04:48:36,494 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:36,495 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:48:36,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:48:36,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:48:36,524 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:36,525 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:48:36,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-02-24 04:48:36,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:48:36,529 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:36,529 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:48:36,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-02-24 04:48:36,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:48:36,533 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:36,534 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:48:36,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-02-24 04:48:36,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:48:36,538 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:36,538 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:48:36,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-02-24 04:48:36,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:48:36,542 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:36,543 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:48:36,547 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 04:48:36,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2042341816] [2021-02-24 04:48:36,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:48:36,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-24 04:48:36,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380813110] [2021-02-24 04:48:36,549 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-24 04:48:36,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:48:36,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-24 04:48:36,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-02-24 04:48:36,550 INFO L87 Difference]: Start difference. First operand 154 states and 185 transitions. Second operand 8 states. [2021-02-24 04:48:37,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:48:37,117 INFO L93 Difference]: Finished difference Result 160 states and 190 transitions. [2021-02-24 04:48:37,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-24 04:48:37,118 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 65 [2021-02-24 04:48:37,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:48:37,120 INFO L225 Difference]: With dead ends: 160 [2021-02-24 04:48:37,120 INFO L226 Difference]: Without dead ends: 152 [2021-02-24 04:48:37,121 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-02-24 04:48:37,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-02-24 04:48:37,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2021-02-24 04:48:37,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2021-02-24 04:48:37,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 181 transitions. [2021-02-24 04:48:37,151 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 181 transitions. Word has length 65 [2021-02-24 04:48:37,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:48:37,152 INFO L480 AbstractCegarLoop]: Abstraction has 152 states and 181 transitions. [2021-02-24 04:48:37,152 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-24 04:48:37,152 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 181 transitions. [2021-02-24 04:48:37,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-02-24 04:48:37,153 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:48:37,153 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 04:48:37,154 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-02-24 04:48:37,154 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:48:37,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:48:37,154 INFO L82 PathProgramCache]: Analyzing trace with hash 756048342, now seen corresponding path program 1 times [2021-02-24 04:48:37,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:48:37,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1263993783] [2021-02-24 04:48:37,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:48:37,157 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:48:37,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:48:37,194 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:37,195 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:48:37,195 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:37,196 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:48:37,198 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:37,199 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:48:37,202 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:37,203 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:48:37,209 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:37,210 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:48:37,216 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:37,216 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:48:37,223 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:37,223 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 04:48:37,230 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:37,233 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 04:48:37,241 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:37,244 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:48:37,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:48:37,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:48:37,293 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:37,294 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:48:37,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-02-24 04:48:37,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:48:37,298 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:37,298 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:48:37,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-02-24 04:48:37,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:48:37,302 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:37,303 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:48:37,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-02-24 04:48:37,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:48:37,307 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:37,307 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:48:37,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-02-24 04:48:37,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:48:37,311 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:37,311 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:48:37,316 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 04:48:37,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1263993783] [2021-02-24 04:48:37,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:48:37,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-02-24 04:48:37,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444135167] [2021-02-24 04:48:37,317 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-24 04:48:37,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:48:37,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-24 04:48:37,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-02-24 04:48:37,318 INFO L87 Difference]: Start difference. First operand 152 states and 181 transitions. Second operand 10 states. [2021-02-24 04:48:38,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:48:38,140 INFO L93 Difference]: Finished difference Result 168 states and 198 transitions. [2021-02-24 04:48:38,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-24 04:48:38,141 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 65 [2021-02-24 04:48:38,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:48:38,144 INFO L225 Difference]: With dead ends: 168 [2021-02-24 04:48:38,144 INFO L226 Difference]: Without dead ends: 166 [2021-02-24 04:48:38,144 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-02-24 04:48:38,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-02-24 04:48:38,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 161. [2021-02-24 04:48:38,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2021-02-24 04:48:38,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 190 transitions. [2021-02-24 04:48:38,176 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 190 transitions. Word has length 65 [2021-02-24 04:48:38,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:48:38,177 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 190 transitions. [2021-02-24 04:48:38,177 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-02-24 04:48:38,177 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 190 transitions. [2021-02-24 04:48:38,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-02-24 04:48:38,178 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:48:38,178 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 04:48:38,178 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-02-24 04:48:38,179 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:48:38,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:48:38,179 INFO L82 PathProgramCache]: Analyzing trace with hash -1034317089, now seen corresponding path program 1 times [2021-02-24 04:48:38,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:48:38,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [238203534] [2021-02-24 04:48:38,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:48:38,182 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:48:38,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:48:38,221 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:38,221 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:48:38,223 WARN L141 QuantifierPusher]: treesize reduction 13, result has 23.5 percent of original size [2021-02-24 04:48:38,223 WARN L147 QuantifierPusher]: treesize reduction 13, result has 23.5 percent of original size 4 [2021-02-24 04:48:38,226 WARN L141 QuantifierPusher]: treesize reduction 5, result has 37.5 percent of original size [2021-02-24 04:48:38,227 WARN L147 QuantifierPusher]: treesize reduction 5, result has 37.5 percent of original size 3 [2021-02-24 04:48:38,231 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:38,231 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-24 04:48:38,236 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:38,237 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:48:38,242 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:38,243 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 04:48:38,249 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:38,249 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 04:48:38,256 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:38,257 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:48:38,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:48:38,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:48:38,296 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:38,296 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:48:38,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-02-24 04:48:38,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:48:38,299 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:38,300 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:48:38,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-02-24 04:48:38,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:48:38,306 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:38,306 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:48:38,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-02-24 04:48:38,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:48:38,310 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:38,310 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:48:38,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-02-24 04:48:38,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:48:38,323 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:38,324 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:48:38,334 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:38,335 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 04:48:38,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-02-24 04:48:38,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:48:38,342 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:38,343 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:48:38,348 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 04:48:38,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [238203534] [2021-02-24 04:48:38,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:48:38,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-02-24 04:48:38,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88683814] [2021-02-24 04:48:38,351 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-24 04:48:38,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:48:38,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-24 04:48:38,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-02-24 04:48:38,352 INFO L87 Difference]: Start difference. First operand 161 states and 190 transitions. Second operand 10 states. [2021-02-24 04:48:39,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:48:39,025 INFO L93 Difference]: Finished difference Result 167 states and 198 transitions. [2021-02-24 04:48:39,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-24 04:48:39,026 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 70 [2021-02-24 04:48:39,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:48:39,028 INFO L225 Difference]: With dead ends: 167 [2021-02-24 04:48:39,028 INFO L226 Difference]: Without dead ends: 165 [2021-02-24 04:48:39,029 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-02-24 04:48:39,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-02-24 04:48:39,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 163. [2021-02-24 04:48:39,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2021-02-24 04:48:39,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 194 transitions. [2021-02-24 04:48:39,064 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 194 transitions. Word has length 70 [2021-02-24 04:48:39,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:48:39,065 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 194 transitions. [2021-02-24 04:48:39,065 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-02-24 04:48:39,065 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 194 transitions. [2021-02-24 04:48:39,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-02-24 04:48:39,067 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:48:39,067 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 04:48:39,067 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-02-24 04:48:39,067 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:48:39,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:48:39,068 INFO L82 PathProgramCache]: Analyzing trace with hash -864516991, now seen corresponding path program 1 times [2021-02-24 04:48:39,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:48:39,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1821789903] [2021-02-24 04:48:39,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:48:39,087 WARN L141 QuantifierPusher]: treesize reduction 8, result has 70.4 percent of original size [2021-02-24 04:48:39,090 WARN L147 QuantifierPusher]: treesize reduction 8, result has 70.4 percent of original size 19 [2021-02-24 04:48:39,091 WARN L141 QuantifierPusher]: treesize reduction 8, result has 70.4 percent of original size [2021-02-24 04:48:39,095 WARN L147 QuantifierPusher]: treesize reduction 8, result has 70.4 percent of original size 19 [2021-02-24 04:48:39,103 WARN L141 QuantifierPusher]: treesize reduction 9, result has 73.5 percent of original size [2021-02-24 04:48:39,105 INFO L723 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2021-02-24 04:48:39,107 INFO L730 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:39,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-24 04:48:39,108 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:39,128 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41 [2021-02-24 04:48:39,130 WARN L147 QuantifierPusher]: treesize reduction 9, result has 73.5 percent of original size 25 [2021-02-24 04:48:39,132 WARN L141 QuantifierPusher]: treesize reduction 8, result has 84.6 percent of original size [2021-02-24 04:48:39,136 WARN L147 QuantifierPusher]: treesize reduction 8, result has 84.6 percent of original size 44 [2021-02-24 04:48:39,138 WARN L141 QuantifierPusher]: treesize reduction 8, result has 70.4 percent of original size [2021-02-24 04:48:39,141 WARN L147 QuantifierPusher]: treesize reduction 8, result has 70.4 percent of original size 19 [2021-02-24 04:48:39,143 WARN L141 QuantifierPusher]: treesize reduction 8, result has 70.4 percent of original size [2021-02-24 04:48:39,145 WARN L147 QuantifierPusher]: treesize reduction 8, result has 70.4 percent of original size 19 [2021-02-24 04:48:39,157 WARN L141 QuantifierPusher]: treesize reduction 6, result has 76.0 percent of original size [2021-02-24 04:48:39,158 INFO L723 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2021-02-24 04:48:39,159 INFO L730 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:39,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-24 04:48:39,160 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:39,163 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 27 [2021-02-24 04:48:39,164 WARN L147 QuantifierPusher]: treesize reduction 6, result has 76.0 percent of original size 19 [2021-02-24 04:48:39,166 WARN L141 QuantifierPusher]: treesize reduction 8, result has 80.5 percent of original size [2021-02-24 04:48:39,168 WARN L147 QuantifierPusher]: treesize reduction 8, result has 80.5 percent of original size 33 [2021-02-24 04:48:39,169 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-24 04:48:39,170 WARN L141 QuantifierPusher]: treesize reduction 11, result has 59.3 percent of original size [2021-02-24 04:48:39,171 WARN L147 QuantifierPusher]: treesize reduction 11, result has 59.3 percent of original size 16 [2021-02-24 04:48:39,174 WARN L141 QuantifierPusher]: treesize reduction 11, result has 59.3 percent of original size [2021-02-24 04:48:39,175 WARN L147 QuantifierPusher]: treesize reduction 11, result has 59.3 percent of original size 16 [2021-02-24 04:48:39,183 WARN L141 QuantifierPusher]: treesize reduction 6, result has 78.6 percent of original size [2021-02-24 04:48:39,185 INFO L723 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2021-02-24 04:48:39,187 INFO L730 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:39,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-24 04:48:39,188 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:48:39,193 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 38 [2021-02-24 04:48:39,194 WARN L147 QuantifierPusher]: treesize reduction 6, result has 78.6 percent of original size 22 [2021-02-24 04:48:39,196 WARN L141 QuantifierPusher]: treesize reduction 8, result has 84.6 percent of original size [2021-02-24 04:48:39,199 WARN L147 QuantifierPusher]: treesize reduction 8, result has 84.6 percent of original size 44 [2021-02-24 04:48:39,200 WARN L141 QuantifierPusher]: treesize reduction 26, result has 3.7 percent of original size [2021-02-24 04:48:39,200 WARN L147 QuantifierPusher]: treesize reduction 26, result has 3.7 percent of original size 1 [2021-02-24 04:48:39,201 WARN L141 QuantifierPusher]: treesize reduction 26, result has 3.7 percent of original size [2021-02-24 04:48:39,202 WARN L147 QuantifierPusher]: treesize reduction 26, result has 3.7 percent of original size 1 [2021-02-24 04:48:39,204 WARN L141 QuantifierPusher]: treesize reduction 2, result has 80.0 percent of original size [2021-02-24 04:48:39,205 WARN L147 QuantifierPusher]: treesize reduction 2, result has 80.0 percent of original size 8 [2021-02-24 04:48:39,210 WARN L141 QuantifierPusher]: treesize reduction 8, result has 75.0 percent of original size [2021-02-24 04:48:39,211 WARN L147 QuantifierPusher]: treesize reduction 8, result has 75.0 percent of original size 24 [2021-02-24 04:48:39,212 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-24 04:48:39,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-24 04:48:39,224 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-24 04:48:39,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-24 04:48:39,235 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-24 04:48:39,263 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-24 04:48:39,263 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-24 04:48:39,264 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-02-24 04:48:39,285 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.02 04:48:39 BoogieIcfgContainer [2021-02-24 04:48:39,285 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-24 04:48:39,286 INFO L168 Benchmark]: Toolchain (without parser) took 14998.50 ms. Allocated memory was 156.2 MB in the beginning and 338.7 MB in the end (delta: 182.5 MB). Free memory was 132.1 MB in the beginning and 301.8 MB in the end (delta: -169.7 MB). Peak memory consumption was 13.3 MB. Max. memory is 8.0 GB. [2021-02-24 04:48:39,287 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 156.2 MB. Free memory is still 141.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-24 04:48:39,287 INFO L168 Benchmark]: CACSL2BoogieTranslator took 284.08 ms. Allocated memory is still 156.2 MB. Free memory was 131.0 MB in the beginning and 120.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-02-24 04:48:39,287 INFO L168 Benchmark]: Boogie Preprocessor took 55.84 ms. Allocated memory is still 156.2 MB. Free memory was 120.3 MB in the beginning and 118.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-24 04:48:39,288 INFO L168 Benchmark]: RCFGBuilder took 687.74 ms. Allocated memory is still 156.2 MB. Free memory was 118.8 MB in the beginning and 126.0 MB in the end (delta: -7.2 MB). Peak memory consumption was 12.4 MB. Max. memory is 8.0 GB. [2021-02-24 04:48:39,288 INFO L168 Benchmark]: TraceAbstraction took 13952.51 ms. Allocated memory was 156.2 MB in the beginning and 338.7 MB in the end (delta: 182.5 MB). Free memory was 125.5 MB in the beginning and 301.8 MB in the end (delta: -176.3 MB). Peak memory consumption was 6.1 MB. Max. memory is 8.0 GB. [2021-02-24 04:48:39,290 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 156.2 MB. Free memory is still 141.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 284.08 ms. Allocated memory is still 156.2 MB. Free memory was 131.0 MB in the beginning and 120.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 55.84 ms. Allocated memory is still 156.2 MB. Free memory was 120.3 MB in the beginning and 118.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 687.74 ms. Allocated memory is still 156.2 MB. Free memory was 118.8 MB in the beginning and 126.0 MB in the end (delta: -7.2 MB). Peak memory consumption was 12.4 MB. Max. memory is 8.0 GB. * TraceAbstraction took 13952.51 ms. Allocated memory was 156.2 MB in the beginning and 338.7 MB in the end (delta: 182.5 MB). Free memory was 125.5 MB in the beginning and 301.8 MB in the end (delta: -176.3 MB). Peak memory consumption was 6.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 19]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L26] int tagbuf_len; [L27] int t; [L28] tagbuf_len = __VERIFIER_nondet_int() [L29] COND TRUE tagbuf_len >= 1 [L30] t = 0 [L31] --tagbuf_len [L32] COND TRUE 1 [L33] COND FALSE !(t == tagbuf_len) [L38] COND FALSE !(__VERIFIER_nondet_int()) [L41] CALL __VERIFIER_assert(0 <= t) [L18] COND FALSE !(!(cond)) [L41] RET __VERIFIER_assert(0 <= t) [L42] CALL __VERIFIER_assert(t <= tagbuf_len) [L18] COND FALSE !(!(cond)) [L42] RET __VERIFIER_assert(t <= tagbuf_len) [L43] t++ [L32] COND TRUE 1 [L33] COND FALSE !(t == tagbuf_len) [L38] COND FALSE !(__VERIFIER_nondet_int()) [L41] CALL __VERIFIER_assert(0 <= t) [L18] COND FALSE !(!(cond)) [L41] RET __VERIFIER_assert(0 <= t) [L42] CALL __VERIFIER_assert(t <= tagbuf_len) [L18] COND FALSE !(!(cond)) [L42] RET __VERIFIER_assert(t <= tagbuf_len) [L43] t++ [L32] COND TRUE 1 [L33] COND FALSE !(t == tagbuf_len) [L38] COND TRUE __VERIFIER_nondet_int() [L45] CALL __VERIFIER_assert(0 <= t) [L18] COND FALSE !(!(cond)) [L45] RET __VERIFIER_assert(0 <= t) [L46] CALL __VERIFIER_assert(t <= tagbuf_len) [L18] COND TRUE !(cond) [L19] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 92 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 13.8s, OverallIterations: 12, TraceHistogramMax: 6, AutomataDifference: 9.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 796 SDtfs, 1319 SDslu, 1336 SDs, 0 SdLazy, 4634 SolverSat, 676 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 302 GetRequests, 102 SyntacticMatches, 9 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1241 ImplicationChecksByTransitivity, 4.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=163occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 11 MinimizatonAttempts, 46 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...