/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-crafted-1/sum_by_3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 18:53:55,334 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 18:53:55,336 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 18:53:55,377 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 18:53:55,378 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 18:53:55,381 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 18:53:55,384 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 18:53:55,389 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 18:53:55,391 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 18:53:55,395 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 18:53:55,396 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 18:53:55,398 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 18:53:55,398 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 18:53:55,401 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 18:53:55,403 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 18:53:55,404 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 18:53:55,407 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 18:53:55,408 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 18:53:55,410 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 18:53:55,416 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 18:53:55,417 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 18:53:55,419 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 18:53:55,420 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 18:53:55,422 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 18:53:55,427 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 18:53:55,436 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 18:53:55,436 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 18:53:55,437 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 18:53:55,438 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 18:53:55,455 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 18:53:55,455 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 18:53:55,458 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 18:53:55,458 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 18:53:55,459 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 18:53:55,459 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 18:53:55,459 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 18:53:55,459 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 18:53:55,459 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 18:53:55,459 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 18:53:55,460 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 18:53:55,461 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 18:53:55,461 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 18:53:55,461 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 18:53:55,461 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 18:53:55,461 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 18:53:55,462 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 18:53:55,462 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 18:53:55,462 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 18:53:55,462 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 18:53:55,462 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 18:53:55,463 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 18:53:55,464 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 18:53:55,770 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 18:53:55,801 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 18:53:55,803 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 18:53:55,804 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 18:53:55,805 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 18:53:55,806 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/sum_by_3.c [2021-05-02 18:53:55,873 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4066f30aa/3c308fde33404380b686c6172dc1a74d/FLAG21171c28e [2021-05-02 18:53:56,333 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 18:53:56,334 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/sum_by_3.c [2021-05-02 18:53:56,343 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4066f30aa/3c308fde33404380b686c6172dc1a74d/FLAG21171c28e [2021-05-02 18:53:56,368 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4066f30aa/3c308fde33404380b686c6172dc1a74d [2021-05-02 18:53:56,371 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 18:53:56,373 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 18:53:56,378 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 18:53:56,378 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 18:53:56,381 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 18:53:56,382 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 06:53:56" (1/1) ... [2021-05-02 18:53:56,383 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a25f54b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:53:56, skipping insertion in model container [2021-05-02 18:53:56,383 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 06:53:56" (1/1) ... [2021-05-02 18:53:56,389 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 18:53:56,403 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 18:53:56,545 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-crafted-1/sum_by_3.c[406,419] [2021-05-02 18:53:56,561 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 18:53:56,569 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 18:53:56,610 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-crafted-1/sum_by_3.c[406,419] [2021-05-02 18:53:56,639 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 18:53:56,654 INFO L208 MainTranslator]: Completed translation [2021-05-02 18:53:56,654 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:53:56 WrapperNode [2021-05-02 18:53:56,655 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 18:53:56,657 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 18:53:56,657 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 18:53:56,657 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 18:53:56,667 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:53:56" (1/1) ... [2021-05-02 18:53:56,668 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:53:56" (1/1) ... [2021-05-02 18:53:56,673 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:53:56" (1/1) ... [2021-05-02 18:53:56,674 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:53:56" (1/1) ... [2021-05-02 18:53:56,684 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:53:56" (1/1) ... [2021-05-02 18:53:56,690 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:53:56" (1/1) ... [2021-05-02 18:53:56,695 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:53:56" (1/1) ... [2021-05-02 18:53:56,699 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 18:53:56,700 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 18:53:56,701 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 18:53:56,701 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 18:53:56,702 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:53:56" (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 18:53:56,774 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 18:53:56,774 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 18:53:56,774 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 18:53:56,774 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 18:53:56,774 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 18:53:56,775 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 18:53:56,775 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 18:53:56,775 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 18:53:56,775 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 18:53:56,775 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 18:53:56,775 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 18:53:56,776 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 18:53:56,776 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2021-05-02 18:53:56,776 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 18:53:56,776 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 18:53:56,776 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 18:53:56,777 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 18:53:56,777 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 18:53:56,777 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 18:53:56,777 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 18:53:57,115 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 18:53:57,115 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-05-02 18:53:57,117 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 06:53:57 BoogieIcfgContainer [2021-05-02 18:53:57,117 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 18:53:57,117 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 18:53:57,117 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 18:53:57,118 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 18:53:57,121 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 06:53:57" (1/1) ... [2021-05-02 18:53:57,174 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~i~0_6 4294967296) (mod v_main_~n~0_11 4294967296)) InVars {main_~i~0=v_main_~i~0_6, main_~n~0=v_main_~n~0_11} OutVars{main_~i~0=v_main_~i~0_6, main_~n~0=v_main_~n~0_11} AuxVars[] AssignedVars[] [2021-05-02 18:53:57,208 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.4 percent of original size [2021-05-02 18:53:59,278 WARN L205 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 8 [2021-05-02 18:54:01,295 WARN L205 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 3 [2021-05-02 18:54:01,379 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.4 percent of original size 59 [2021-05-02 18:54:01,411 INFO L1112 elerationTransformer]: Accelerated Formula: (and (= v_main_~i~0_5 (+ v_main_~i~0_6 1)) (< (mod v_main_~i~0_6 4294967296) (mod v_main_~n~0_11 4294967296))) InVars {main_~i~0=v_main_~i~0_6, main_~n~0=v_main_~n~0_11} OutVars{main_~i~0=v_main_~i~0_5, main_~n~0=v_main_~n~0_11} AuxVars[] AssignedVars[main_~i~0] with Formula: (let ((.cse0 (mod v_main_~n~0_11 4294967296)) (.cse2 (mod v_main_~i~0_6 4294967296))) (or (let ((.cse1 (+ v_itFin_1 v_main_~i~0_6))) (and (<= .cse0 (mod .cse1 4294967296)) (< 0 v_itFin_1) (<= (div (+ (* v_itFin_1 (- 1)) (* v_main_~i~0_6 (- 1)) .cse0) (- 4294967296)) (+ (div (+ v_main_~i~0_6 (- 4294967295)) 4294967296) 1)) (= v_main_~i~0_5 .cse1) (< .cse2 .cse0))) (and (= v_itFin_1 0) (= v_main_~i~0_6 v_main_~i~0_5) (<= .cse0 .cse2)))) InVars {main_~i~0=v_main_~i~0_6, main_~n~0=v_main_~n~0_11} OutVars{main_~i~0=v_main_~i~0_5, main_~n~0=v_main_~n~0_11} AuxVars[v_itFin_1] AssignedVars[main_~i~0] [2021-05-02 18:54:01,419 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~j~0_3 4294967296) (mod v_main_~n~0_2 4294967296)) InVars {main_~j~0=v_main_~j~0_3, main_~n~0=v_main_~n~0_2} OutVars{main_~j~0=v_main_~j~0_3, main_~n~0=v_main_~n~0_2} AuxVars[] AssignedVars[] [2021-05-02 18:54:01,426 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.4 percent of original size [2021-05-02 18:54:05,471 WARN L205 SmtUtils]: Spent 4.01 s on a formula simplification that was a NOOP. DAG size: 6 [2021-05-02 18:54:05,522 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.4 percent of original size 59 [2021-05-02 18:54:05,562 INFO L1112 elerationTransformer]: Accelerated Formula: (and (< (mod v_main_~j~0_3 4294967296) (mod v_main_~n~0_2 4294967296)) (= v_main_~j~0_2 (+ v_main_~j~0_3 1))) InVars {main_~j~0=v_main_~j~0_3, main_~n~0=v_main_~n~0_2} OutVars{main_~j~0=v_main_~j~0_2, main_~n~0=v_main_~n~0_2} AuxVars[] AssignedVars[main_~j~0] with Formula: (let ((.cse2 (mod v_main_~n~0_2 4294967296)) (.cse1 (mod v_main_~j~0_3 4294967296))) (or (let ((.cse0 (+ v_itFin_2 v_main_~j~0_3))) (and (= .cse0 v_main_~j~0_2) (< .cse1 .cse2) (< 0 v_itFin_2) (<= (div (+ (* v_itFin_2 (- 1)) .cse2 (* v_main_~j~0_3 (- 1))) (- 4294967296)) (+ (div (+ v_main_~j~0_3 (- 4294967295)) 4294967296) 1)) (<= .cse2 (mod .cse0 4294967296)))) (and (<= .cse2 .cse1) (= v_itFin_2 0) (= v_main_~j~0_3 v_main_~j~0_2)))) InVars {main_~j~0=v_main_~j~0_3, main_~n~0=v_main_~n~0_2} OutVars{main_~j~0=v_main_~j~0_2, main_~n~0=v_main_~n~0_2} AuxVars[v_itFin_2] AssignedVars[main_~j~0] [2021-05-02 18:54:05,566 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< (mod v_main_~k~0_5 4294967296) (mod v_main_~n~0_9 4294967296)) InVars {main_~k~0=v_main_~k~0_5, main_~n~0=v_main_~n~0_9} OutVars{main_~k~0=v_main_~k~0_5, main_~n~0=v_main_~n~0_9} AuxVars[] AssignedVars[] [2021-05-02 18:54:05,573 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.4 percent of original size [2021-05-02 18:54:05,660 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.4 percent of original size 59 [2021-05-02 18:54:05,712 INFO L1112 elerationTransformer]: Accelerated Formula: (and (< (mod v_main_~k~0_5 4294967296) (mod v_main_~n~0_9 4294967296)) (= v_main_~k~0_4 (+ v_main_~k~0_5 1))) InVars {main_~k~0=v_main_~k~0_5, main_~n~0=v_main_~n~0_9} OutVars{main_~k~0=v_main_~k~0_4, main_~n~0=v_main_~n~0_9} AuxVars[] AssignedVars[main_~k~0] with Formula: (let ((.cse0 (mod v_main_~n~0_9 4294967296)) (.cse1 (mod v_main_~k~0_5 4294967296))) (or (and (<= .cse0 (mod (+ v_main_~k~0_5 v_itFin_3) 4294967296)) (< 0 v_itFin_3) (= v_main_~k~0_4 (+ v_itFin_3 v_main_~k~0_5)) (<= (div (+ (* v_itFin_3 (- 1)) (* v_main_~k~0_5 (- 1)) .cse0) (- 4294967296)) (+ (div (+ v_main_~k~0_5 (- 4294967295)) 4294967296) 1)) (< .cse1 .cse0)) (and (= v_main_~k~0_5 v_main_~k~0_4) (<= .cse0 .cse1) (= v_itFin_3 0)))) InVars {main_~k~0=v_main_~k~0_5, main_~n~0=v_main_~n~0_9} OutVars{main_~k~0=v_main_~k~0_4, main_~n~0=v_main_~n~0_9} AuxVars[v_itFin_3] AssignedVars[main_~k~0] [2021-05-02 18:54:05,716 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 06:54:05 BasicIcfg [2021-05-02 18:54:05,717 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 18:54:05,718 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 18:54:05,718 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 18:54:05,721 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 18:54:05,721 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 06:53:56" (1/4) ... [2021-05-02 18:54:05,721 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ec2cd15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 06:54:05, skipping insertion in model container [2021-05-02 18:54:05,721 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:53:56" (2/4) ... [2021-05-02 18:54:05,722 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ec2cd15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 06:54:05, skipping insertion in model container [2021-05-02 18:54:05,722 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 06:53:57" (3/4) ... [2021-05-02 18:54:05,722 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ec2cd15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 06:54:05, skipping insertion in model container [2021-05-02 18:54:05,722 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 06:54:05" (4/4) ... [2021-05-02 18:54:05,723 INFO L111 eAbstractionObserver]: Analyzing ICFG sum_by_3.cJordan [2021-05-02 18:54:05,728 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 18:54:05,731 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 18:54:05,773 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 18:54:05,802 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 18:54:05,803 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 18:54:05,803 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 18:54:05,803 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 18:54:05,803 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 18:54:05,803 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 18:54:05,803 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 18:54:05,803 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 18:54:05,819 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 16 states have (on average 1.5625) internal successors, (25), 17 states have internal predecessors, (25), 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 18:54:05,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-02 18:54:05,829 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:54:05,830 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:54:05,830 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:54:05,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:54:05,834 INFO L82 PathProgramCache]: Analyzing trace with hash -1502834522, now seen corresponding path program 1 times [2021-05-02 18:54:05,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:54:05,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648203781] [2021-05-02 18:54:05,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:54:05,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:54:06,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:54:06,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:54:06,069 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 18:54:06,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:54:06,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648203781] [2021-05-02 18:54:06,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648203781] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 18:54:06,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 18:54:06,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 18:54:06,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980881485] [2021-05-02 18:54:06,075 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 18:54:06,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:54:06,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 18:54:06,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 18:54:06,090 INFO L87 Difference]: Start difference. First operand has 24 states, 16 states have (on average 1.5625) internal successors, (25), 17 states have internal predecessors, (25), 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 4.0) internal successors, (12), 2 states have internal predecessors, (12), 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 18:54:06,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:54:06,145 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2021-05-02 18:54:06,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 18:54:06,147 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 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 16 [2021-05-02 18:54:06,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:54:06,153 INFO L225 Difference]: With dead ends: 24 [2021-05-02 18:54:06,153 INFO L226 Difference]: Without dead ends: 17 [2021-05-02 18:54:06,154 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 18:54:06,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-05-02 18:54:06,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-05-02 18:54:06,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 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 18:54:06,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-05-02 18:54:06,180 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 16 [2021-05-02 18:54:06,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:54:06,180 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-05-02 18:54:06,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 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 18:54:06,181 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-05-02 18:54:06,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-02 18:54:06,181 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:54:06,181 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:54:06,182 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 18:54:06,182 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:54:06,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:54:06,182 INFO L82 PathProgramCache]: Analyzing trace with hash 1872181992, now seen corresponding path program 1 times [2021-05-02 18:54:06,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:54:06,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718899141] [2021-05-02 18:54:06,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:54:06,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:54:06,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:54:06,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:54:06,712 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 18:54:06,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:54:06,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718899141] [2021-05-02 18:54:06,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718899141] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 18:54:06,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 18:54:06,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 18:54:06,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876573313] [2021-05-02 18:54:06,714 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 18:54:06,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:54:06,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 18:54:06,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 18:54:06,715 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 9 states, 8 states have (on average 1.5) internal successors, (12), 6 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 18:54:07,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:54:07,176 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2021-05-02 18:54:07,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 18:54:07,177 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.5) internal successors, (12), 6 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) Word has length 16 [2021-05-02 18:54:07,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:54:07,179 INFO L225 Difference]: With dead ends: 31 [2021-05-02 18:54:07,179 INFO L226 Difference]: Without dead ends: 28 [2021-05-02 18:54:07,180 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 574.6ms TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-05-02 18:54:07,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-05-02 18:54:07,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 22. [2021-05-02 18:54:07,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 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 18:54:07,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2021-05-02 18:54:07,185 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 16 [2021-05-02 18:54:07,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:54:07,185 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2021-05-02 18:54:07,185 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 1.5) internal successors, (12), 6 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 18:54:07,185 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2021-05-02 18:54:07,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 18:54:07,186 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:54:07,186 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:54:07,186 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 18:54:07,186 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:54:07,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:54:07,187 INFO L82 PathProgramCache]: Analyzing trace with hash -2065178785, now seen corresponding path program 1 times [2021-05-02 18:54:07,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:54:07,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187880649] [2021-05-02 18:54:07,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:54:07,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:54:07,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:54:07,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:54:07,710 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 18:54:07,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:54:07,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187880649] [2021-05-02 18:54:07,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187880649] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:54:07,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770632976] [2021-05-02 18:54:07,710 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 18:54:07,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:54:07,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-02 18:54:07,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:54:07,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:08,011 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 18:54:08,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770632976] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:54:08,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:54:08,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2021-05-02 18:54:08,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368785056] [2021-05-02 18:54:08,012 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 18:54:08,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:54:08,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 18:54:08,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-05-02 18:54:08,014 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 15 states have internal predecessors, (25), 4 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 18:54:08,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:54:08,583 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2021-05-02 18:54:08,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 18:54:08,584 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 15 states have internal predecessors, (25), 4 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-02 18:54:08,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:54:08,585 INFO L225 Difference]: With dead ends: 28 [2021-05-02 18:54:08,585 INFO L226 Difference]: Without dead ends: 18 [2021-05-02 18:54:08,585 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 864.1ms TimeCoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2021-05-02 18:54:08,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-05-02 18:54:08,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-05-02 18:54:08,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 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 18:54:08,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2021-05-02 18:54:08,591 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 17 [2021-05-02 18:54:08,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:54:08,592 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2021-05-02 18:54:08,592 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 15 states have internal predecessors, (25), 4 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 18:54:08,592 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2021-05-02 18:54:08,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 18:54:08,593 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:54:08,593 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:54:08,809 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-02 18:54:08,809 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:54:08,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:54:08,809 INFO L82 PathProgramCache]: Analyzing trace with hash 301668447, now seen corresponding path program 1 times [2021-05-02 18:54:08,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:54:08,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681280321] [2021-05-02 18:54:08,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:54:08,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:54:09,234 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 62 [2021-05-02 18:54:09,793 WARN L205 SmtUtils]: Spent 455.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 64 [2021-05-02 18:54:09,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:54:09,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:54:09,873 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 18:54:09,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:54:09,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681280321] [2021-05-02 18:54:09,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681280321] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:54:09,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888719501] [2021-05-02 18:54:09,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 18:54:09,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:54:09,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-02 18:54:09,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:54:10,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:54:10,033 WARN L159 QuantifierPusher]: Ignoring assumption.