/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-acceleration/phases_2-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-22 02:21:39,603 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-22 02:21:39,608 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-22 02:21:39,664 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-22 02:21:39,664 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-22 02:21:39,668 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-22 02:21:39,672 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-22 02:21:39,680 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-22 02:21:39,683 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-22 02:21:39,689 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-22 02:21:39,691 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-22 02:21:39,693 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-22 02:21:39,693 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-22 02:21:39,696 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-22 02:21:39,698 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-22 02:21:39,700 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-22 02:21:39,718 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-22 02:21:39,719 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-22 02:21:39,727 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-22 02:21:39,735 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-22 02:21:39,737 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-22 02:21:39,739 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-22 02:21:39,740 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-22 02:21:39,743 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-22 02:21:39,752 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-22 02:21:39,764 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-22 02:21:39,765 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-22 02:21:39,766 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-22 02:21:39,767 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationWernerOverapprox_32.epf [2021-02-22 02:21:39,791 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-22 02:21:39,791 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-22 02:21:39,796 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-22 02:21:39,796 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-22 02:21:39,796 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-22 02:21:39,797 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-22 02:21:39,797 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-22 02:21:39,797 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-22 02:21:39,797 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-22 02:21:39,797 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-22 02:21:39,799 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-22 02:21:39,799 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-22 02:21:39,799 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-22 02:21:39,800 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-22 02:21:39,800 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-22 02:21:39,800 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-22 02:21:39,800 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-22 02:21:39,801 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-22 02:21:39,801 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-22 02:21:39,801 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-22 02:21:39,801 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-22 02:21:39,802 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-22 02:21:39,802 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX [2021-02-22 02:21:39,802 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-22 02:21:40,235 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-22 02:21:40,262 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-22 02:21:40,265 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-22 02:21:40,267 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-22 02:21:40,267 INFO L275 PluginConnector]: CDTParser initialized [2021-02-22 02:21:40,268 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/phases_2-2.c [2021-02-22 02:21:40,342 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40fc750e5/bba97e74c41a4ae1b84ebd74e7161d07/FLAGf1401bbfe [2021-02-22 02:21:40,954 INFO L306 CDTParser]: Found 1 translation units. [2021-02-22 02:21:40,954 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/phases_2-2.c [2021-02-22 02:21:40,964 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40fc750e5/bba97e74c41a4ae1b84ebd74e7161d07/FLAGf1401bbfe [2021-02-22 02:21:41,313 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40fc750e5/bba97e74c41a4ae1b84ebd74e7161d07 [2021-02-22 02:21:41,317 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-22 02:21:41,333 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-22 02:21:41,341 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-22 02:21:41,341 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-22 02:21:41,345 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-22 02:21:41,346 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 02:21:41" (1/1) ... [2021-02-22 02:21:41,348 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c3bd2b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:41, skipping insertion in model container [2021-02-22 02:21:41,348 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 02:21:41" (1/1) ... [2021-02-22 02:21:41,357 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-22 02:21:41,377 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-22 02:21:41,585 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-acceleration/phases_2-2.c[459,472] [2021-02-22 02:21:41,602 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 02:21:41,618 INFO L203 MainTranslator]: Completed pre-run [2021-02-22 02:21:41,635 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-acceleration/phases_2-2.c[459,472] [2021-02-22 02:21:41,643 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 02:21:41,673 INFO L208 MainTranslator]: Completed translation [2021-02-22 02:21:41,673 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:41 WrapperNode [2021-02-22 02:21:41,673 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-22 02:21:41,677 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-22 02:21:41,677 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-22 02:21:41,678 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-22 02:21:41,693 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:41" (1/1) ... [2021-02-22 02:21:41,694 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:41" (1/1) ... [2021-02-22 02:21:41,704 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:41" (1/1) ... [2021-02-22 02:21:41,705 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:41" (1/1) ... [2021-02-22 02:21:41,723 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:41" (1/1) ... [2021-02-22 02:21:41,731 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:41" (1/1) ... [2021-02-22 02:21:41,735 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:41" (1/1) ... [2021-02-22 02:21:41,743 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-22 02:21:41,746 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-22 02:21:41,746 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-22 02:21:41,747 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-22 02:21:41,748 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:41" (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 [2021-02-22 02:21:41,879 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-22 02:21:41,879 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-22 02:21:41,879 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-22 02:21:41,879 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-22 02:21:41,880 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-22 02:21:41,880 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-22 02:21:41,880 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-22 02:21:41,881 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-22 02:21:41,881 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-22 02:21:41,882 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-22 02:21:41,882 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-22 02:21:41,882 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2021-02-22 02:21:41,882 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-22 02:21:41,883 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-22 02:21:41,883 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-22 02:21:41,884 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-22 02:21:41,884 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-22 02:21:41,885 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-22 02:21:41,886 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-22 02:21:41,887 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-22 02:21:42,317 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-22 02:21:42,317 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-22 02:21:42,323 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 02:21:42 BoogieIcfgContainer [2021-02-22 02:21:42,323 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-22 02:21:42,329 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-22 02:21:42,329 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-22 02:21:42,338 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-22 02:21:42,339 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.02 02:21:41" (1/3) ... [2021-02-22 02:21:42,340 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27c25049 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 02:21:42, skipping insertion in model container [2021-02-22 02:21:42,341 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:21:41" (2/3) ... [2021-02-22 02:21:42,341 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27c25049 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 02:21:42, skipping insertion in model container [2021-02-22 02:21:42,341 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 02:21:42" (3/3) ... [2021-02-22 02:21:42,343 INFO L111 eAbstractionObserver]: Analyzing ICFG phases_2-2.c [2021-02-22 02:21:42,352 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-22 02:21:42,357 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-22 02:21:42,379 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-22 02:21:42,406 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-22 02:21:42,406 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-22 02:21:42,406 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-22 02:21:42,406 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-22 02:21:42,407 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-22 02:21:42,407 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-22 02:21:42,407 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-22 02:21:42,407 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-22 02:21:42,423 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2021-02-22 02:21:42,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-22 02:21:42,433 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:21:42,435 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] [2021-02-22 02:21:42,435 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:21:42,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:21:42,443 INFO L82 PathProgramCache]: Analyzing trace with hash 1523584107, now seen corresponding path program 1 times [2021-02-22 02:21:42,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:21:42,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1286065663] [2021-02-22 02:21:42,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:21:42,543 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 02:21:42,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:21:42,660 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:42,662 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:42,664 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:42,665 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:42,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 02:21:42,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:21:42,801 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:42,804 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:42,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 02:21:42,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1286065663] [2021-02-22 02:21:42,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 02:21:42,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-22 02:21:42,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431886783] [2021-02-22 02:21:42,839 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-22 02:21:42,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 02:21:42,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-22 02:21:42,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-22 02:21:42,858 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2021-02-22 02:21:42,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 02:21:42,966 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2021-02-22 02:21:42,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-22 02:21:42,969 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2021-02-22 02:21:42,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 02:21:42,977 INFO L225 Difference]: With dead ends: 46 [2021-02-22 02:21:42,978 INFO L226 Difference]: Without dead ends: 27 [2021-02-22 02:21:42,981 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 [2021-02-22 02:21:43,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-02-22 02:21:43,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-02-22 02:21:43,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-02-22 02:21:43,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-02-22 02:21:43,030 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 21 [2021-02-22 02:21:43,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 02:21:43,030 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-02-22 02:21:43,031 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-22 02:21:43,031 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-02-22 02:21:43,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-22 02:21:43,032 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:21:43,032 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] [2021-02-22 02:21:43,033 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-22 02:21:43,033 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:21:43,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:21:43,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1510654813, now seen corresponding path program 1 times [2021-02-22 02:21:43,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:21:43,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1208574468] [2021-02-22 02:21:43,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:21:43,038 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 02:21:43,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:21:43,127 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:43,128 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:43,129 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:43,130 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-22 02:21:43,140 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:43,141 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-22 02:21:43,153 WARN L141 QuantifierPusher]: treesize reduction 3, result has 92.5 percent of original size [2021-02-22 02:21:43,156 WARN L147 QuantifierPusher]: treesize reduction 3, result has 92.5 percent of original size 37 [2021-02-22 02:21:43,199 WARN L141 QuantifierPusher]: treesize reduction 21, result has 77.2 percent of original size [2021-02-22 02:21:43,202 WARN L147 QuantifierPusher]: treesize reduction 21, result has 77.2 percent of original size 71 [2021-02-22 02:21:43,249 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:43,250 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 02:21:43,258 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:43,259 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 02:21:43,269 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:43,270 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:43,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 02:21:43,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:21:43,322 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:21:43,323 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:21:43,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 02:21:43,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1208574468] [2021-02-22 02:21:43,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 02:21:43,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-22 02:21:43,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573695753] [2021-02-22 02:21:43,329 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-22 02:21:43,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 02:21:43,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-22 02:21:43,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-02-22 02:21:43,331 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 8 states. [2021-02-22 02:21:43,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 02:21:43,685 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2021-02-22 02:21:43,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-22 02:21:43,686 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2021-02-22 02:21:43,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 02:21:43,688 INFO L225 Difference]: With dead ends: 37 [2021-02-22 02:21:43,688 INFO L226 Difference]: Without dead ends: 32 [2021-02-22 02:21:43,690 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-02-22 02:21:43,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-02-22 02:21:43,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2021-02-22 02:21:43,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-02-22 02:21:43,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2021-02-22 02:21:43,704 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 21 [2021-02-22 02:21:43,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 02:21:43,705 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2021-02-22 02:21:43,705 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-22 02:21:43,705 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2021-02-22 02:21:43,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-22 02:21:43,706 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:21:43,706 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] [2021-02-22 02:21:43,707 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-22 02:21:43,707 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:21:43,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:21:43,708 INFO L82 PathProgramCache]: Analyzing trace with hash -2050410236, now seen corresponding path program 1 times [2021-02-22 02:21:43,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:21:43,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [699356173] [2021-02-22 02:21:43,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY