/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/loop-acceleration/overflow_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 18:00:53,412 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 18:00:53,414 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 18:00:53,433 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 18:00:53,433 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 18:00:53,434 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 18:00:53,435 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 18:00:53,436 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 18:00:53,437 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 18:00:53,438 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 18:00:53,450 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 18:00:53,450 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 18:00:53,451 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 18:00:53,451 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 18:00:53,452 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 18:00:53,453 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 18:00:53,453 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 18:00:53,454 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 18:00:53,472 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 18:00:53,475 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 18:00:53,476 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 18:00:53,477 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 18:00:53,478 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 18:00:53,478 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 18:00:53,480 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 18:00:53,485 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 18:00:53,486 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 18:00:53,486 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 18:00:53,487 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 18:00:53,494 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 18:00:53,494 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 18:00:53,495 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 18:00:53,495 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 18:00:53,495 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 18:00:53,495 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 18:00:53,495 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 18:00:53,495 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 18:00:53,496 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 18:00:53,496 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 18:00:53,496 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 18:00:53,496 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 18:00:53,496 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 18:00:53,496 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 18:00:53,496 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 18:00:53,496 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 18:00:53,496 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 18:00:53,497 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 18:00:53,497 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 18:00:53,497 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 18:00:53,497 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 18:00:53,497 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 18:00:53,497 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 18:00:53,714 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 18:00:53,727 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 18:00:53,729 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 18:00:53,730 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 18:00:53,731 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 18:00:53,732 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/overflow_1-1.c [2021-05-02 18:00:53,800 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06d10c7bc/236ec5aa8b3c41e8885081de568b7929/FLAGa361daa37 [2021-05-02 18:00:54,159 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 18:00:54,159 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/overflow_1-1.c [2021-05-02 18:00:54,163 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06d10c7bc/236ec5aa8b3c41e8885081de568b7929/FLAGa361daa37 [2021-05-02 18:00:54,577 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06d10c7bc/236ec5aa8b3c41e8885081de568b7929 [2021-05-02 18:00:54,579 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 18:00:54,580 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 18:00:54,581 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 18:00:54,581 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 18:00:54,583 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 18:00:54,584 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 06:00:54" (1/1) ... [2021-05-02 18:00:54,585 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5cb42fe0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:00:54, skipping insertion in model container [2021-05-02 18:00:54,585 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 06:00:54" (1/1) ... [2021-05-02 18:00:54,589 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 18:00:54,597 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 18:00:54,674 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/overflow_1-1.c[324,337] [2021-05-02 18:00:54,678 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 18:00:54,683 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 18:00:54,690 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/overflow_1-1.c[324,337] [2021-05-02 18:00:54,691 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 18:00:54,732 INFO L208 MainTranslator]: Completed translation [2021-05-02 18:00:54,732 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:00:54 WrapperNode [2021-05-02 18:00:54,732 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 18:00:54,733 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 18:00:54,733 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 18:00:54,733 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 18:00:54,739 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:00:54" (1/1) ... [2021-05-02 18:00:54,746 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:00:54" (1/1) ... [2021-05-02 18:00:54,750 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:00:54" (1/1) ... [2021-05-02 18:00:54,750 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:00:54" (1/1) ... [2021-05-02 18:00:54,753 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:00:54" (1/1) ... [2021-05-02 18:00:54,755 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:00:54" (1/1) ... [2021-05-02 18:00:54,757 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:00:54" (1/1) ... [2021-05-02 18:00:54,758 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 18:00:54,759 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 18:00:54,759 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 18:00:54,759 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 18:00:54,760 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:00:54" (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 18:00:54,838 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 18:00:54,838 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 18:00:54,838 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 18:00:54,838 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 18:00:54,838 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 18:00:54,838 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 18:00:54,838 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 18:00:54,838 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 18:00:54,838 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 18:00:54,838 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 18:00:54,838 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 18:00:54,839 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 18:00:54,839 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 18:00:54,839 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 18:00:54,839 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 18:00:54,839 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 18:00:54,839 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 18:00:54,965 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 18:00:54,965 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 18:00:54,966 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 06:00:54 BoogieIcfgContainer [2021-05-02 18:00:54,966 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 18:00:54,966 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 18:00:54,967 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 18:00:54,967 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 18:00:54,969 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 06:00:54" (1/1) ... [2021-05-02 18:00:55,012 INFO L181 rdanLoopAcceleration]: Guard: Formula: (<= 10 (mod v_main_~x~0_2 4294967296)) InVars {main_~x~0=v_main_~x~0_2} OutVars{main_~x~0=v_main_~x~0_2} AuxVars[] AssignedVars[] [2021-05-02 18:00:55,050 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size [2021-05-02 18:00:55,334 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2021-05-02 18:00:55,535 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.4 percent of original size 57 [2021-05-02 18:00:55,599 INFO L1112 elerationTransformer]: Accelerated Formula: (and (= v_main_~x~0_1 (+ v_main_~x~0_2 2)) (<= 10 (mod v_main_~x~0_2 4294967296))) InVars {main_~x~0=v_main_~x~0_2} OutVars{main_~x~0=v_main_~x~0_1} AuxVars[] AssignedVars[main_~x~0] with Formula: (let ((.cse0 (mod v_main_~x~0_2 4294967296))) (or (and (<= (div (+ (* v_itFin_1 (- 1)) (div (+ (* v_main_~x~0_2 (- 1)) (- 1)) 2) 1) (- 2147483648)) (+ (div (+ (* (div (+ v_main_~x~0_2 (- 10)) (- 2)) (- 1)) 1) 2147483648) 1)) (< 0 v_itFin_1) (<= 10 .cse0) (= v_main_~x~0_1 (+ (* 2 v_itFin_1) v_main_~x~0_2)) (< (mod (+ (* v_itFin_1 2) v_main_~x~0_2) 4294967296) 10)) (and (= v_itFin_1 0) (< .cse0 10) (= v_main_~x~0_2 v_main_~x~0_1)))) InVars {main_~x~0=v_main_~x~0_2} OutVars{main_~x~0=v_main_~x~0_1} AuxVars[v_itFin_1] AssignedVars[main_~x~0] [2021-05-02 18:00:55,604 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 06:00:55 BasicIcfg [2021-05-02 18:00:55,604 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 18:00:55,605 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 18:00:55,605 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 18:00:55,607 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 18:00:55,608 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 06:00:54" (1/4) ... [2021-05-02 18:00:55,608 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c408ab6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 06:00:55, skipping insertion in model container [2021-05-02 18:00:55,608 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:00:54" (2/4) ... [2021-05-02 18:00:55,608 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c408ab6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 06:00:55, skipping insertion in model container [2021-05-02 18:00:55,608 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 06:00:54" (3/4) ... [2021-05-02 18:00:55,609 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c408ab6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 06:00:55, skipping insertion in model container [2021-05-02 18:00:55,609 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 06:00:55" (4/4) ... [2021-05-02 18:00:55,609 INFO L111 eAbstractionObserver]: Analyzing ICFG overflow_1-1.cJordan [2021-05-02 18:00:55,613 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 18:00:55,615 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 18:00:55,625 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 18:00:55,636 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 18:00:55,636 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 18:00:55,636 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 18:00:55,636 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 18:00:55,636 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 18:00:55,637 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 18:00:55,637 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 18:00:55,637 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 18:00:55,645 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 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 18:00:55,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 18:00:55,649 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:00:55,649 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:00:55,649 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:00:55,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:00:55,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1690616289, now seen corresponding path program 1 times [2021-05-02 18:00:55,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:00:55,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010287765] [2021-05-02 18:00:55,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:00:55,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:00:55,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:00:55,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:00:55,839 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 18:00:55,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:00:55,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010287765] [2021-05-02 18:00:55,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010287765] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 18:00:55,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 18:00:55,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 18:00:55,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720620644] [2021-05-02 18:00:55,846 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 18:00:55,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:00:55,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 18:00:55,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 18:00:55,860 INFO L87 Difference]: Start difference. First operand has 18 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 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 18:00:55,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:00:55,938 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2021-05-02 18:00:55,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 18:00:55,940 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 18:00:55,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:00:55,946 INFO L225 Difference]: With dead ends: 18 [2021-05-02 18:00:55,946 INFO L226 Difference]: Without dead ends: 12 [2021-05-02 18:00:55,947 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 18:00:55,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-05-02 18:00:55,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-05-02 18:00:55,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 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 18:00:55,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2021-05-02 18:00:55,966 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 11 [2021-05-02 18:00:55,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:00:55,966 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2021-05-02 18:00:55,966 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 18:00:55,966 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2021-05-02 18:00:55,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 18:00:55,967 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:00:55,967 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:00:55,967 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 18:00:55,967 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:00:55,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:00:55,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1689692768, now seen corresponding path program 1 times [2021-05-02 18:00:55,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:00:55,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848698110] [2021-05-02 18:00:55,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:00:55,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:00:56,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:00:56,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:00:56,091 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 18:00:56,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:00:56,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848698110] [2021-05-02 18:00:56,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848698110] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 18:00:56,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 18:00:56,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 18:00:56,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007645215] [2021-05-02 18:00:56,093 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 18:00:56,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:00:56,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 18:00:56,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 18:00:56,095 INFO L87 Difference]: Start difference. First operand 12 states and 12 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 18:00:56,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:00:56,137 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2021-05-02 18:00:56,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 18:00:56,137 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 18:00:56,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:00:56,138 INFO L225 Difference]: With dead ends: 13 [2021-05-02 18:00:56,138 INFO L226 Difference]: Without dead ends: 13 [2021-05-02 18:00:56,139 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 52.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-02 18:00:56,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-05-02 18:00:56,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-05-02 18:00:56,141 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 18:00:56,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2021-05-02 18:00:56,142 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2021-05-02 18:00:56,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:00:56,142 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2021-05-02 18:00:56,142 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 18:00:56,142 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2021-05-02 18:00:56,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 18:00:56,143 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:00:56,143 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:00:56,143 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 18:00:56,144 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:00:56,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:00:56,146 INFO L82 PathProgramCache]: Analyzing trace with hash -814146699, now seen corresponding path program 1 times [2021-05-02 18:00:56,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:00:56,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316675630] [2021-05-02 18:00:56,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:00:56,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:00:56,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:00:56,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:00:56,286 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 18:00:56,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:00:56,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316675630] [2021-05-02 18:00:56,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316675630] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:00:56,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165932454] [2021-05-02 18:00:56,287 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 18:00:56,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:00:56,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-02 18:00:56,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:00:56,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:00:56,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:00:56,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:00:56,413 WARN L159 QuantifierPusher]: Ignoring assumption.