/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/loops/sum04-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 17:39:33,719 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 17:39:33,721 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 17:39:33,739 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 17:39:33,740 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 17:39:33,740 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 17:39:33,741 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 17:39:33,743 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 17:39:33,744 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 17:39:33,744 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 17:39:33,745 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 17:39:33,746 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2021-05-02 17:39:33,770 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 17:39:33,770 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 17:39:33,770 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 17:39:33,774 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 17:39:33,786 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 17:39:33,786 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 17:39:33,787 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 17:39:33,787 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 17:39:33,787 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 17:39:33,787 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 17:39:33,787 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 17:39:33,787 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 17:39:33,788 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 17:39:33,788 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 17:39:33,788 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 17:39:33,788 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 17:39:33,788 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 17:39:33,788 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 17:39:33,788 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 17:39:33,788 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 17:39:33,788 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 17:39:33,788 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 17:39:33,789 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 17:39:33,789 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 17:39:33,789 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 17:39:33,789 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 17:39:33,789 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 17:39:34,075 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 17:39:34,089 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 17:39:34,091 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 17:39:34,092 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 17:39:34,093 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 17:39:34,093 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum04-2.i [2021-05-02 17:39:34,138 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/62ee5edcd/6fa6f09e4ace492c9a9902de6a224d69/FLAG0259bef9f [2021-05-02 17:39:34,492 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 17:39:34,493 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum04-2.i [2021-05-02 17:39:34,497 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/62ee5edcd/6fa6f09e4ace492c9a9902de6a224d69/FLAG0259bef9f [2021-05-02 17:39:34,506 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/62ee5edcd/6fa6f09e4ace492c9a9902de6a224d69 [2021-05-02 17:39:34,508 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 17:39:34,511 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 17:39:34,512 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 17:39:34,512 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 17:39:34,523 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 17:39:34,524 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 05:39:34" (1/1) ... [2021-05-02 17:39:34,525 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61cc4643 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:39:34, skipping insertion in model container [2021-05-02 17:39:34,525 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 05:39:34" (1/1) ... [2021-05-02 17:39:34,530 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 17:39:34,544 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 17:39:34,665 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/sum04-2.i[808,821] [2021-05-02 17:39:34,673 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 17:39:34,679 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 17:39:34,687 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/sum04-2.i[808,821] [2021-05-02 17:39:34,690 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 17:39:34,700 INFO L208 MainTranslator]: Completed translation [2021-05-02 17:39:34,700 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:39:34 WrapperNode [2021-05-02 17:39:34,700 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 17:39:34,701 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 17:39:34,701 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 17:39:34,703 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 17:39:34,736 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:39:34" (1/1) ... [2021-05-02 17:39:34,736 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:39:34" (1/1) ... [2021-05-02 17:39:34,741 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:39:34" (1/1) ... [2021-05-02 17:39:34,741 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:39:34" (1/1) ... [2021-05-02 17:39:34,744 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:39:34" (1/1) ... [2021-05-02 17:39:34,747 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:39:34" (1/1) ... [2021-05-02 17:39:34,751 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:39:34" (1/1) ... [2021-05-02 17:39:34,754 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 17:39:34,756 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 17:39:34,756 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 17:39:34,756 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 17:39:34,759 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:39:34" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 17:39:34,825 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 17:39:34,825 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 17:39:34,825 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 17:39:34,825 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 17:39:34,826 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 17:39:34,826 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 17:39:34,826 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 17:39:34,826 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-02 17:39:34,826 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-02 17:39:34,826 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 17:39:34,826 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 17:39:34,827 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 17:39:34,827 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 17:39:34,827 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 17:39:34,827 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 17:39:34,827 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 17:39:34,827 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 17:39:34,827 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 17:39:34,828 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 17:39:35,018 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 17:39:35,019 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 17:39:35,021 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 05:39:35 BoogieIcfgContainer [2021-05-02 17:39:35,021 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 17:39:35,022 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 17:39:35,022 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 17:39:35,023 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 17:39:35,024 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 05:39:35" (1/1) ... [2021-05-02 17:39:35,037 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 05:39:35 BasicIcfg [2021-05-02 17:39:35,037 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 17:39:35,038 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 17:39:35,038 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 17:39:35,040 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 17:39:35,040 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 05:39:34" (1/4) ... [2021-05-02 17:39:35,041 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6af3c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 05:39:35, skipping insertion in model container [2021-05-02 17:39:35,041 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:39:34" (2/4) ... [2021-05-02 17:39:35,042 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6af3c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 05:39:35, skipping insertion in model container [2021-05-02 17:39:35,042 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 05:39:35" (3/4) ... [2021-05-02 17:39:35,043 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6af3c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 05:39:35, skipping insertion in model container [2021-05-02 17:39:35,043 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 05:39:35" (4/4) ... [2021-05-02 17:39:35,044 INFO L111 eAbstractionObserver]: Analyzing ICFG sum04-2.iJordan [2021-05-02 17:39:35,048 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 17:39:35,052 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 17:39:35,063 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 17:39:35,084 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 17:39:35,084 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 17:39:35,084 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 17:39:35,084 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 17:39:35,085 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 17:39:35,085 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 17:39:35,085 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 17:39:35,085 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 17:39:35,096 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 17:39:35,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 17:39:35,102 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:39:35,103 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:39:35,103 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:39:35,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:39:35,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1795998501, now seen corresponding path program 1 times [2021-05-02 17:39:35,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:39:35,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326374832] [2021-05-02 17:39:35,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:39:35,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:39:35,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:39:35,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:39:35,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:39:35,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:39:35,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326374832] [2021-05-02 17:39:35,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326374832] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 17:39:35,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 17:39:35,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 17:39:35,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869755079] [2021-05-02 17:39:35,305 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 17:39:35,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:39:35,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 17:39:35,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 17:39:35,314 INFO L87 Difference]: Start difference. First operand has 19 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:39:35,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:39:35,358 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2021-05-02 17:39:35,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 17:39:35,360 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-02 17:39:35,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:39:35,364 INFO L225 Difference]: With dead ends: 19 [2021-05-02 17:39:35,364 INFO L226 Difference]: Without dead ends: 13 [2021-05-02 17:39:35,365 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 17:39:35,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-05-02 17:39:35,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-05-02 17:39:35,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:39:35,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2021-05-02 17:39:35,384 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2021-05-02 17:39:35,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:39:35,384 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2021-05-02 17:39:35,384 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:39:35,384 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2021-05-02 17:39:35,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 17:39:35,385 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:39:35,385 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:39:35,385 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 17:39:35,385 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:39:35,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:39:35,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1796922022, now seen corresponding path program 1 times [2021-05-02 17:39:35,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:39:35,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928951197] [2021-05-02 17:39:35,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:39:35,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:39:35,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:39:35,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:39:35,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:39:35,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:39:35,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928951197] [2021-05-02 17:39:35,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928951197] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 17:39:35,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 17:39:35,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 17:39:35,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725167545] [2021-05-02 17:39:35,445 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 17:39:35,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:39:35,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 17:39:35,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 17:39:35,446 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:39:35,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:39:35,483 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2021-05-02 17:39:35,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 17:39:35,484 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-02 17:39:35,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:39:35,484 INFO L225 Difference]: With dead ends: 15 [2021-05-02 17:39:35,485 INFO L226 Difference]: Without dead ends: 15 [2021-05-02 17:39:35,485 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-02 17:39:35,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-05-02 17:39:35,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2021-05-02 17:39:35,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:39:35,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2021-05-02 17:39:35,487 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2021-05-02 17:39:35,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:39:35,488 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2021-05-02 17:39:35,488 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:39:35,488 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2021-05-02 17:39:35,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-02 17:39:35,488 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:39:35,488 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:39:35,488 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 17:39:35,489 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:39:35,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:39:35,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1176605188, now seen corresponding path program 1 times [2021-05-02 17:39:35,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:39:35,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510734966] [2021-05-02 17:39:35,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:39:35,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:39:35,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:39:35,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:39:35,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:39:35,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:39:35,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510734966] [2021-05-02 17:39:35,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510734966] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:39:35,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482666256] [2021-05-02 17:39:35,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:39:35,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:39:35,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-02 17:39:35,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:39:35,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:35,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:35,703 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:39:35,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482666256] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:39:35,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:39:35,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-05-02 17:39:35,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982054241] [2021-05-02 17:39:35,704 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 17:39:35,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:39:35,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 17:39:35,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 17:39:35,709 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:39:35,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:39:35,799 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2021-05-02 17:39:35,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 17:39:35,800 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-05-02 17:39:35,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:39:35,801 INFO L225 Difference]: With dead ends: 17 [2021-05-02 17:39:35,801 INFO L226 Difference]: Without dead ends: 17 [2021-05-02 17:39:35,801 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 85.4ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 17:39:35,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-05-02 17:39:35,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2021-05-02 17:39:35,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:39:35,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2021-05-02 17:39:35,803 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2021-05-02 17:39:35,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:39:35,803 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2021-05-02 17:39:35,804 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:39:35,804 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2021-05-02 17:39:35,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-02 17:39:35,804 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:39:35,804 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:39:36,006 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-02 17:39:36,007 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:39:36,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:39:36,007 INFO L82 PathProgramCache]: Analyzing trace with hash 2052581858, now seen corresponding path program 2 times [2021-05-02 17:39:36,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:39:36,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399681096] [2021-05-02 17:39:36,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:39:36,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:39:36,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:39:36,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:39:36,082 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:39:36,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:39:36,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399681096] [2021-05-02 17:39:36,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399681096] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:39:36,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401201886] [2021-05-02 17:39:36,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:39:36,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 17:39:36,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:39:36,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-02 17:39:36,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:39:36,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:36,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:36,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:36,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:36,192 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:39:36,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401201886] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:39:36,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:39:36,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-05-02 17:39:36,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554878361] [2021-05-02 17:39:36,194 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 17:39:36,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:39:36,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 17:39:36,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 17:39:36,198 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:39:36,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:39:36,277 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2021-05-02 17:39:36,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 17:39:36,277 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-05-02 17:39:36,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:39:36,279 INFO L225 Difference]: With dead ends: 19 [2021-05-02 17:39:36,279 INFO L226 Difference]: Without dead ends: 19 [2021-05-02 17:39:36,280 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 73.5ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-05-02 17:39:36,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-05-02 17:39:36,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2021-05-02 17:39:36,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 13 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:39:36,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2021-05-02 17:39:36,285 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 15 [2021-05-02 17:39:36,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:39:36,286 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2021-05-02 17:39:36,286 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:39:36,286 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2021-05-02 17:39:36,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 17:39:36,287 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:39:36,287 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:39:36,505 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:39:36,506 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:39:36,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:39:36,506 INFO L82 PathProgramCache]: Analyzing trace with hash 2052571712, now seen corresponding path program 3 times [2021-05-02 17:39:36,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:39:36,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069123690] [2021-05-02 17:39:36,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:39:36,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:39:36,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:39:36,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:39:36,558 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:39:36,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:39:36,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069123690] [2021-05-02 17:39:36,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069123690] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:39:36,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850715814] [2021-05-02 17:39:36,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:39:36,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 17:39:36,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:39:36,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 17:39:36,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:39:36,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:36,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:36,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:36,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:36,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:36,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:36,658 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:39:36,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850715814] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:39:36,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:39:36,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-05-02 17:39:36,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861969365] [2021-05-02 17:39:36,659 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 17:39:36,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:39:36,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 17:39:36,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 17:39:36,660 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:39:36,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:39:36,768 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2021-05-02 17:39:36,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 17:39:36,769 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-05-02 17:39:36,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:39:36,771 INFO L225 Difference]: With dead ends: 21 [2021-05-02 17:39:36,771 INFO L226 Difference]: Without dead ends: 21 [2021-05-02 17:39:36,771 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 93.4ms TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2021-05-02 17:39:36,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-05-02 17:39:36,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2021-05-02 17:39:36,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:39:36,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2021-05-02 17:39:36,785 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 17 [2021-05-02 17:39:36,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:39:36,785 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2021-05-02 17:39:36,785 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:39:36,785 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2021-05-02 17:39:36,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-02 17:39:36,785 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:39:36,786 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:39:37,003 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:39:37,004 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:39:37,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:39:37,004 INFO L82 PathProgramCache]: Analyzing trace with hash 2042821406, now seen corresponding path program 4 times [2021-05-02 17:39:37,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:39:37,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459041130] [2021-05-02 17:39:37,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:39:37,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:39:37,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:39:37,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:39:37,104 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:39:37,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:39:37,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459041130] [2021-05-02 17:39:37,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459041130] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:39:37,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91052118] [2021-05-02 17:39:37,105 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:39:37,143 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 17:39:37,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:39:37,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-02 17:39:37,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:39:37,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:37,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:37,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:37,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:37,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:37,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:37,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:37,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:37,222 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:39:37,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91052118] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:39:37,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:39:37,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2021-05-02 17:39:37,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090838793] [2021-05-02 17:39:37,223 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 17:39:37,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:39:37,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 17:39:37,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-02 17:39:37,225 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:39:37,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:39:37,355 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2021-05-02 17:39:37,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 17:39:37,356 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-05-02 17:39:37,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:39:37,356 INFO L225 Difference]: With dead ends: 23 [2021-05-02 17:39:37,356 INFO L226 Difference]: Without dead ends: 23 [2021-05-02 17:39:37,357 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 148.9ms TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-05-02 17:39:37,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-05-02 17:39:37,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2021-05-02 17:39:37,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 17 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:39:37,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2021-05-02 17:39:37,359 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 19 [2021-05-02 17:39:37,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:39:37,359 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2021-05-02 17:39:37,359 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:39:37,359 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2021-05-02 17:39:37,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-02 17:39:37,360 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:39:37,360 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:39:37,564 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:39:37,565 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:39:37,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:39:37,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1262711932, now seen corresponding path program 5 times [2021-05-02 17:39:37,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:39:37,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128353976] [2021-05-02 17:39:37,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:39:37,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:39:37,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:39:37,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:39:37,643 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:39:37,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:39:37,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128353976] [2021-05-02 17:39:37,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128353976] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:39:37,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111962610] [2021-05-02 17:39:37,644 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:39:37,765 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-02 17:39:37,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:39:37,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 17:39:37,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:39:37,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:37,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:37,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:37,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:37,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:37,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:37,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:37,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:37,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:37,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:37,833 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:39:37,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111962610] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:39:37,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:39:37,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2021-05-02 17:39:37,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853240631] [2021-05-02 17:39:37,834 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 17:39:37,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:39:37,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 17:39:37,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-02 17:39:37,835 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:39:37,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:39:37,962 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2021-05-02 17:39:37,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 17:39:37,963 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-05-02 17:39:37,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:39:37,964 INFO L225 Difference]: With dead ends: 25 [2021-05-02 17:39:37,964 INFO L226 Difference]: Without dead ends: 25 [2021-05-02 17:39:37,964 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 138.8ms TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2021-05-02 17:39:37,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-02 17:39:37,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2021-05-02 17:39:37,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 19 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:39:37,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2021-05-02 17:39:37,966 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 21 [2021-05-02 17:39:37,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:39:37,966 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2021-05-02 17:39:37,966 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:39:37,966 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2021-05-02 17:39:37,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 17:39:37,966 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:39:37,967 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:39:38,170 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-02 17:39:38,171 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:39:38,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:39:38,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1098183078, now seen corresponding path program 6 times [2021-05-02 17:39:38,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:39:38,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316446380] [2021-05-02 17:39:38,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:39:38,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:39:38,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:39:38,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:39:38,243 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:39:38,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:39:38,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316446380] [2021-05-02 17:39:38,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316446380] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:39:38,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203006461] [2021-05-02 17:39:38,243 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:39:38,281 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-02 17:39:38,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:39:38,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-02 17:39:38,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:39:38,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:38,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:38,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:38,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:38,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:38,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:38,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:38,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:38,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:38,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:38,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:38,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:38,351 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:39:38,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203006461] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:39:38,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:39:38,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-05-02 17:39:38,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73322148] [2021-05-02 17:39:38,352 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 17:39:38,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:39:38,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 17:39:38,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-02 17:39:38,354 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:39:38,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:39:38,512 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2021-05-02 17:39:38,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 17:39:38,512 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2021-05-02 17:39:38,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:39:38,513 INFO L225 Difference]: With dead ends: 27 [2021-05-02 17:39:38,513 INFO L226 Difference]: Without dead ends: 27 [2021-05-02 17:39:38,513 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 143.8ms TimeCoverageRelationStatistics Valid=118, Invalid=188, Unknown=0, NotChecked=0, Total=306 [2021-05-02 17:39:38,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-02 17:39:38,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2021-05-02 17:39:38,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 21 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:39:38,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2021-05-02 17:39:38,515 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 23 [2021-05-02 17:39:38,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:39:38,515 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2021-05-02 17:39:38,515 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:39:38,516 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2021-05-02 17:39:38,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-02 17:39:38,516 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:39:38,516 INFO L523 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:39:38,721 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:39:38,721 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:39:38,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:39:38,722 INFO L82 PathProgramCache]: Analyzing trace with hash 2119411896, now seen corresponding path program 7 times [2021-05-02 17:39:38,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:39:38,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904528577] [2021-05-02 17:39:38,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:39:38,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:39:38,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:39:38,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:39:38,802 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:39:38,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:39:38,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904528577] [2021-05-02 17:39:38,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904528577] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:39:38,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054461667] [2021-05-02 17:39:38,803 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:39:38,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:39:38,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 17:39:38,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:39:38,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:38,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:38,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:38,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:38,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:38,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:38,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:38,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:38,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:38,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:38,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:38,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:38,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:38,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:38,911 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:39:38,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054461667] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:39:38,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:39:38,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2021-05-02 17:39:38,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792039699] [2021-05-02 17:39:38,914 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 17:39:38,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:39:38,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 17:39:38,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-02 17:39:38,915 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:39:39,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:39:39,127 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2021-05-02 17:39:39,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 17:39:39,127 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2021-05-02 17:39:39,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:39:39,128 INFO L225 Difference]: With dead ends: 28 [2021-05-02 17:39:39,128 INFO L226 Difference]: Without dead ends: 28 [2021-05-02 17:39:39,128 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 203.4ms TimeCoverageRelationStatistics Valid=146, Invalid=234, Unknown=0, NotChecked=0, Total=380 [2021-05-02 17:39:39,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-05-02 17:39:39,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-05-02 17:39:39,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:39:39,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2021-05-02 17:39:39,130 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 25 [2021-05-02 17:39:39,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:39:39,131 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2021-05-02 17:39:39,131 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:39:39,131 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2021-05-02 17:39:39,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-02 17:39:39,131 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:39:39,131 INFO L523 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:39:39,347 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:39:39,348 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:39:39,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:39:39,348 INFO L82 PathProgramCache]: Analyzing trace with hash 1851728790, now seen corresponding path program 8 times [2021-05-02 17:39:39,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:39:39,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028281340] [2021-05-02 17:39:39,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:39:39,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:39:39,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:39:39,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:39:39,493 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:39:39,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:39:39,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028281340] [2021-05-02 17:39:39,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028281340] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:39:39,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473615811] [2021-05-02 17:39:39,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:39:39,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 17:39:39,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:39:39,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-02 17:39:39,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:39:39,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:39,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:39,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:39,629 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:39:39,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473615811] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:39:39,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:39:39,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 16 [2021-05-02 17:39:39,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033986925] [2021-05-02 17:39:39,630 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 17:39:39,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:39:39,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 17:39:39,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-05-02 17:39:39,631 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 13 states have internal predecessors, (26), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:39:39,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:39:39,958 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2021-05-02 17:39:39,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 17:39:39,958 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 13 states have internal predecessors, (26), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2021-05-02 17:39:39,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:39:39,959 INFO L225 Difference]: With dead ends: 33 [2021-05-02 17:39:39,959 INFO L226 Difference]: Without dead ends: 30 [2021-05-02 17:39:39,959 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 313.5ms TimeCoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2021-05-02 17:39:39,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-05-02 17:39:39,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-05-02 17:39:39,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.04) internal successors, (26), 25 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:39:39,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2021-05-02 17:39:39,961 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 27 [2021-05-02 17:39:39,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:39:39,961 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2021-05-02 17:39:39,961 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 13 states have internal predecessors, (26), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:39:39,962 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2021-05-02 17:39:39,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 17:39:39,962 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:39:39,962 INFO L523 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:39:40,176 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-02 17:39:40,177 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:39:40,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:39:40,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1988665612, now seen corresponding path program 9 times [2021-05-02 17:39:40,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:39:40,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210423233] [2021-05-02 17:39:40,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:39:40,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:39:40,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:39:40,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:39:40,249 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 66 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:39:40,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:39:40,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210423233] [2021-05-02 17:39:40,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210423233] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:39:40,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395966525] [2021-05-02 17:39:40,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:39:40,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-05-02 17:39:40,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:39:40,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-02 17:39:40,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:39:40,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:40,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:40,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:40,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:40,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:40,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:40,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:40,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:40,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:40,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:40,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:40,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:40,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:40,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:40,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:40,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:40,360 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:39:40,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395966525] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 17:39:40,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:39:40,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [12] total 13 [2021-05-02 17:39:40,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125927677] [2021-05-02 17:39:40,361 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 17:39:40,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:39:40,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 17:39:40,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-05-02 17:39:40,362 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:39:40,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:39:40,385 INFO L93 Difference]: Finished difference Result 23 states and 22 transitions. [2021-05-02 17:39:40,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 17:39:40,385 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2021-05-02 17:39:40,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:39:40,386 INFO L225 Difference]: With dead ends: 23 [2021-05-02 17:39:40,386 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 17:39:40,386 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 50.7ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-05-02 17:39:40,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 17:39:40,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 17:39:40,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-02 17:39:40,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 17:39:40,387 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2021-05-02 17:39:40,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:39:40,387 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 17:39:40,387 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:39:40,387 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 17:39:40,387 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 17:39:40,603 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:39:40,607 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 05:39:40 BasicIcfg [2021-05-02 17:39:40,607 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 17:39:40,608 INFO L168 Benchmark]: Toolchain (without parser) took 6099.07 ms. Allocated memory was 192.9 MB in the beginning and 231.7 MB in the end (delta: 38.8 MB). Free memory was 159.0 MB in the beginning and 135.8 MB in the end (delta: 23.2 MB). Peak memory consumption was 62.8 MB. Max. memory is 8.0 GB. [2021-05-02 17:39:40,608 INFO L168 Benchmark]: CDTParser took 0.51 ms. Allocated memory is still 192.9 MB. Free memory is still 175.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 17:39:40,608 INFO L168 Benchmark]: CACSL2BoogieTranslator took 188.83 ms. Allocated memory is still 192.9 MB. Free memory was 158.8 MB in the beginning and 149.5 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-02 17:39:40,608 INFO L168 Benchmark]: Boogie Preprocessor took 53.41 ms. Allocated memory is still 192.9 MB. Free memory was 149.5 MB in the beginning and 176.5 MB in the end (delta: -27.0 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2021-05-02 17:39:40,608 INFO L168 Benchmark]: RCFGBuilder took 265.10 ms. Allocated memory is still 192.9 MB. Free memory was 176.5 MB in the beginning and 163.5 MB in the end (delta: 13.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-05-02 17:39:40,608 INFO L168 Benchmark]: IcfgTransformer took 15.13 ms. Allocated memory is still 192.9 MB. Free memory was 163.5 MB in the beginning and 162.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 17:39:40,608 INFO L168 Benchmark]: TraceAbstraction took 5569.08 ms. Allocated memory was 192.9 MB in the beginning and 231.7 MB in the end (delta: 38.8 MB). Free memory was 161.9 MB in the beginning and 135.8 MB in the end (delta: 26.2 MB). Peak memory consumption was 66.0 MB. Max. memory is 8.0 GB. [2021-05-02 17:39:40,609 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.51 ms. Allocated memory is still 192.9 MB. Free memory is still 175.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 188.83 ms. Allocated memory is still 192.9 MB. Free memory was 158.8 MB in the beginning and 149.5 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 53.41 ms. Allocated memory is still 192.9 MB. Free memory was 149.5 MB in the beginning and 176.5 MB in the end (delta: -27.0 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 265.10 ms. Allocated memory is still 192.9 MB. Free memory was 176.5 MB in the beginning and 163.5 MB in the end (delta: 13.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * IcfgTransformer took 15.13 ms. Allocated memory is still 192.9 MB. Free memory was 163.5 MB in the beginning and 162.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 5569.08 ms. Allocated memory was 192.9 MB in the beginning and 231.7 MB in the end (delta: 38.8 MB). Free memory was 161.9 MB in the beginning and 135.8 MB in the end (delta: 26.2 MB). Peak memory consumption was 66.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 5521.5ms, OverallIterations: 11, TraceHistogramMax: 9, EmptinessCheckTime: 12.4ms, AutomataDifference: 1383.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 8.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 120 SDtfs, 155 SDslu, 259 SDs, 0 SdLazy, 594 SolverSat, 76 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 344.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 327 GetRequests, 201 SyntacticMatches, 2 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 1329.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred in iteration=10, InterpolantAutomatonStates: 88, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 42.9ms AutomataMinimizationTime, 11 MinimizatonAttempts, 7 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 63.8ms SsaConstructionTime, 222.5ms SatisfiabilityAnalysisTime, 1486.4ms InterpolantComputationTime, 400 NumberOfCodeBlocks, 398 NumberOfCodeBlocksAsserted, 45 NumberOfCheckSat, 380 ConstructedInterpolants, 0 QuantifiedInterpolants, 1184 SizeOfPredicates, 1 NumberOfNonLiveVariables, 855 ConjunctsInSsa, 76 ConjunctsInUnsatCore, 20 InterpolantComputations, 3 PerfectInterpolantSequences, 147/570 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...