/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/loopv2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 06:23:20,113 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 06:23:20,114 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 06:23:20,138 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 06:23:20,139 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 06:23:20,139 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 06:23:20,140 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 06:23:20,141 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 06:23:20,142 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 06:23:20,143 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 06:23:20,143 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 06:23:20,144 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 06:23:20,144 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 06:23:20,145 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 06:23:20,146 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 06:23:20,146 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 06:23:20,147 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 06:23:20,147 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 06:23:20,148 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 06:23:20,149 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 06:23:20,150 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 06:23:20,153 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 06:23:20,153 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 06:23:20,154 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 06:23:20,155 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 06:23:20,160 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 06:23:20,161 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 06:23:20,161 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 06:23:20,168 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 06:23:20,203 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 06:23:20,203 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 06:23:20,204 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 06:23:20,205 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 06:23:20,205 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 06:23:20,205 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 06:23:20,205 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 06:23:20,205 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 06:23:20,205 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 06:23:20,205 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 06:23:20,205 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 06:23:20,205 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 06:23:20,205 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 06:23:20,206 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 06:23:20,206 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 06:23:20,206 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 06:23:20,206 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 06:23:20,206 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 06:23:20,208 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 06:23:20,208 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 06:23:20,208 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 06:23:20,209 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 06:23:20,209 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 06:23:20,488 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 06:23:20,515 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 06:23:20,517 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 06:23:20,518 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 06:23:20,519 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 06:23:20,520 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/loopv2.c [2021-05-06 06:23:20,571 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0826af322/beae9c9ebf344ab39b6c9af9a4547577/FLAG638361c96 [2021-05-06 06:23:20,931 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 06:23:20,931 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/loopv2.c [2021-05-06 06:23:20,935 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0826af322/beae9c9ebf344ab39b6c9af9a4547577/FLAG638361c96 [2021-05-06 06:23:20,945 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0826af322/beae9c9ebf344ab39b6c9af9a4547577 [2021-05-06 06:23:20,947 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 06:23:20,948 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 06:23:20,950 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 06:23:20,950 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 06:23:20,953 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 06:23:20,954 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 06:23:20" (1/1) ... [2021-05-06 06:23:20,954 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75fd323c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 06:23:20, skipping insertion in model container [2021-05-06 06:23:20,954 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 06:23:20" (1/1) ... [2021-05-06 06:23:20,959 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 06:23:20,969 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 06:23:21,046 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/loopv2.c[454,467] [2021-05-06 06:23:21,053 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 06:23:21,058 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 06:23:21,096 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/loopv2.c[454,467] [2021-05-06 06:23:21,102 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 06:23:21,116 INFO L208 MainTranslator]: Completed translation [2021-05-06 06:23:21,117 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 06:23:21 WrapperNode [2021-05-06 06:23:21,117 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 06:23:21,119 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 06:23:21,119 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 06:23:21,119 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 06:23:21,126 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 06:23:21" (1/1) ... [2021-05-06 06:23:21,126 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 06:23:21" (1/1) ... [2021-05-06 06:23:21,131 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 06:23:21" (1/1) ... [2021-05-06 06:23:21,131 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 06:23:21" (1/1) ... [2021-05-06 06:23:21,138 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 06:23:21" (1/1) ... [2021-05-06 06:23:21,141 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 06:23:21" (1/1) ... [2021-05-06 06:23:21,146 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 06:23:21" (1/1) ... [2021-05-06 06:23:21,151 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 06:23:21,152 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 06:23:21,152 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 06:23:21,152 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 06:23:21,152 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 06:23:21" (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 [2021-05-06 06:23:21,203 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 06:23:21,203 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 06:23:21,204 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 06:23:21,204 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 06:23:21,204 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 06:23:21,204 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 06:23:21,204 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 06:23:21,204 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 06:23:21,204 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 06:23:21,204 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 06:23:21,204 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 06:23:21,204 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 06:23:21,204 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 06:23:21,205 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 06:23:21,205 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 06:23:21,205 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 06:23:21,205 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 06:23:21,205 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 06:23:21,205 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 06:23:21,205 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 06:23:21,354 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 06:23:21,355 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 06:23:21,355 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 06:23:21 BoogieIcfgContainer [2021-05-06 06:23:21,356 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 06:23:21,356 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 06:23:21,356 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 06:23:21,357 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 06:23:21,358 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 06:23:21" (1/1) ... [2021-05-06 06:23:21,407 WARN L240 tifierPushTermWalker]: treesize reduction 6, result has 89.8 percent of original size [2021-05-06 06:23:21,454 WARN L245 tifierPushTermWalker]: treesize reduction 6, result has 89.8 percent of original size 53 [2021-05-06 06:23:21,494 INFO L89 elerationTransformer]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 06:23:21,494 INFO L91 elerationTransformer]: Accelerated Formula: (and (< v_main_~i~0_5 v_main_~n~0_7) (= v_main_~j~0_6 (+ v_main_~i~0_4 2)) (= v_main_~i~0_4 (+ v_main_~i~0_5 4))) InVars {main_~i~0=v_main_~i~0_5, main_~n~0=v_main_~n~0_7} OutVars{main_~j~0=v_main_~j~0_6, main_~i~0=v_main_~i~0_4, main_~n~0=v_main_~n~0_7} AuxVars[] AssignedVars[main_~j~0, main_~i~0] to Formula: (or (let ((.cse0 (* v_itFin_1 4))) (and (< 0 v_itFin_1) (= v_main_~j~0_6 (+ .cse0 v_main_~i~0_5 2)) (< v_itFin_1 (+ (div (+ (* v_main_~i~0_5 (- 1)) v_main_~n~0_7 (- 1)) 4) 2)) (= v_main_~i~0_4 (+ .cse0 v_main_~i~0_5)))) (and (= v_main_~j~0_7 v_main_~j~0_6) (<= v_main_~n~0_7 v_main_~i~0_5) (= v_itFin_1 0) (= v_main_~i~0_4 v_main_~i~0_5))) InVars {main_~i~0=v_main_~i~0_5, main_~n~0=v_main_~n~0_7, main_~j~0=v_main_~j~0_7} OutVars{main_~i~0=v_main_~i~0_4, main_~n~0=v_main_~n~0_7, main_~j~0=v_main_~j~0_6} AuxVars[v_itFin_1] AssignedVars[main_~j~0, main_~i~0] [2021-05-06 06:23:21,514 WARN L240 tifierPushTermWalker]: treesize reduction 17, result has 70.2 percent of original size [2021-05-06 06:23:21,541 WARN L245 tifierPushTermWalker]: treesize reduction 17, result has 70.2 percent of original size 40 [2021-05-06 06:23:21,560 INFO L89 elerationTransformer]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 06:23:21,561 INFO L91 elerationTransformer]: Accelerated Formula: (and (= (let ((.cse0 (mod v_main_~j~0_3 2))) (ite (and (< v_main_~j~0_3 0) (not (= .cse0 0))) (+ .cse0 (- 2)) .cse0)) 0) (= v_main_~j~0_2 (+ v_main_~j~0_3 (- 4))) (= v_main_~k~0_1 (+ v_main_~k~0_2 (- 4)))) InVars {main_~k~0=v_main_~k~0_2, main_~j~0=v_main_~j~0_3} OutVars{main_~k~0=v_main_~k~0_1, main_~j~0=v_main_~j~0_2} AuxVars[] AssignedVars[main_~k~0, main_~j~0] to Formula: (let ((.cse0 (= (mod v_main_~j~0_3 2) 0))) (or (and (= v_main_~k~0_2 v_main_~k~0_1) (= v_itFin_2 0) (not .cse0) (= v_main_~j~0_3 v_main_~j~0_2)) (let ((.cse1 (* 4 v_itFin_2))) (and (< 0 v_itFin_2) (= v_main_~j~0_3 (+ .cse1 v_main_~j~0_2)) .cse0 (= (+ .cse1 v_main_~k~0_1) v_main_~k~0_2))))) InVars {main_~k~0=v_main_~k~0_2, main_~j~0=v_main_~j~0_3} OutVars{main_~k~0=v_main_~k~0_1, main_~j~0=v_main_~j~0_2} AuxVars[v_itFin_2] AssignedVars[main_~k~0, main_~j~0] [2021-05-06 06:23:21,564 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 06:23:21 BasicIcfg [2021-05-06 06:23:21,564 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 06:23:21,565 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 06:23:21,565 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 06:23:21,567 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 06:23:21,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 06:23:20" (1/4) ... [2021-05-06 06:23:21,568 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37c0d9c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 06:23:21, skipping insertion in model container [2021-05-06 06:23:21,568 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 06:23:21" (2/4) ... [2021-05-06 06:23:21,568 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37c0d9c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 06:23:21, skipping insertion in model container [2021-05-06 06:23:21,568 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 06:23:21" (3/4) ... [2021-05-06 06:23:21,569 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37c0d9c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 06:23:21, skipping insertion in model container [2021-05-06 06:23:21,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 06:23:21" (4/4) ... [2021-05-06 06:23:21,569 INFO L111 eAbstractionObserver]: Analyzing ICFG loopv2.cJordan [2021-05-06 06:23:21,573 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 06:23:21,575 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 06:23:21,586 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 06:23:21,596 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 06:23:21,597 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 06:23:21,597 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 06:23:21,597 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 06:23:21,597 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 06:23:21,597 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 06:23:21,597 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 06:23:21,597 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 06:23:21,605 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 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) [2021-05-06 06:23:21,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-06 06:23:21,610 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:23:21,610 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:23:21,611 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:23:21,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:23:21,614 INFO L82 PathProgramCache]: Analyzing trace with hash -123410816, now seen corresponding path program 1 times [2021-05-06 06:23:21,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:23:21,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624635517] [2021-05-06 06:23:21,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:23:21,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:23:21,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:23:21,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:23:21,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:23:21,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:23:21,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624635517] [2021-05-06 06:23:21,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624635517] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 06:23:21,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 06:23:21,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 06:23:21,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612884761] [2021-05-06 06:23:21,790 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 06:23:21,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:23:21,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 06:23:21,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 06:23:21,802 INFO L87 Difference]: Start difference. First operand has 22 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 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 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 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) [2021-05-06 06:23:21,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:23:21,835 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2021-05-06 06:23:21,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 06:23:21,837 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 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 14 [2021-05-06 06:23:21,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:23:21,843 INFO L225 Difference]: With dead ends: 22 [2021-05-06 06:23:21,843 INFO L226 Difference]: Without dead ends: 15 [2021-05-06 06:23:21,844 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 65.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 06:23:21,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-05-06 06:23:21,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-05-06 06:23:21,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.2) internal successors, (12), 10 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) [2021-05-06 06:23:21,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-05-06 06:23:21,864 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 14 [2021-05-06 06:23:21,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:23:21,865 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-05-06 06:23:21,865 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 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) [2021-05-06 06:23:21,865 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-05-06 06:23:21,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-06 06:23:21,866 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:23:21,866 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:23:21,866 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 06:23:21,866 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:23:21,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:23:21,868 INFO L82 PathProgramCache]: Analyzing trace with hash 765016386, now seen corresponding path program 1 times [2021-05-06 06:23:21,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:23:21,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500110116] [2021-05-06 06:23:21,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:23:21,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:23:21,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:23:21,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:23:22,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:23:22,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:23:22,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500110116] [2021-05-06 06:23:22,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500110116] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 06:23:22,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 06:23:22,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 06:23:22,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576561019] [2021-05-06 06:23:22,005 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 06:23:22,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:23:22,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 06:23:22,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 06:23:22,007 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 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) [2021-05-06 06:23:22,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:23:22,057 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2021-05-06 06:23:22,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 06:23:22,057 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 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 14 [2021-05-06 06:23:22,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:23:22,058 INFO L225 Difference]: With dead ends: 18 [2021-05-06 06:23:22,058 INFO L226 Difference]: Without dead ends: 18 [2021-05-06 06:23:22,058 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 47.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-06 06:23:22,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-05-06 06:23:22,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-05-06 06:23:22,062 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) [2021-05-06 06:23:22,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2021-05-06 06:23:22,063 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 14 [2021-05-06 06:23:22,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:23:22,063 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2021-05-06 06:23:22,064 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 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) [2021-05-06 06:23:22,065 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2021-05-06 06:23:22,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-06 06:23:22,066 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:23:22,066 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:23:22,066 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 06:23:22,070 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:23:22,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:23:22,070 INFO L82 PathProgramCache]: Analyzing trace with hash -2027574220, now seen corresponding path program 1 times [2021-05-06 06:23:22,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:23:22,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482175985] [2021-05-06 06:23:22,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:23:22,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:23:22,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:23:22,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:23:22,211 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:23:22,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:23:22,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482175985] [2021-05-06 06:23:22,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482175985] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:23:22,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844777556] [2021-05-06 06:23:22,212 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 [2021-05-06 06:23:22,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:23:22,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-06 06:23:22,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:23:22,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:23:22,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844777556] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:23:22,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:23:22,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 9 [2021-05-06 06:23:22,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105537457] [2021-05-06 06:23:22,314 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 06:23:22,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:23:22,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 06:23:22,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 06:23:22,315 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 7 states have internal predecessors, (16), 3 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) [2021-05-06 06:23:22,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:23:22,451 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2021-05-06 06:23:22,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 06:23:22,452 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 7 states have internal predecessors, (16), 3 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 15 [2021-05-06 06:23:22,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:23:22,452 INFO L225 Difference]: With dead ends: 19 [2021-05-06 06:23:22,452 INFO L226 Difference]: Without dead ends: 16 [2021-05-06 06:23:22,453 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 149.3ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-05-06 06:23:22,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-05-06 06:23:22,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-05-06 06:23:22,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 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) [2021-05-06 06:23:22,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2021-05-06 06:23:22,455 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 15 [2021-05-06 06:23:22,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:23:22,455 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2021-05-06 06:23:22,455 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 7 states have internal predecessors, (16), 3 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) [2021-05-06 06:23:22,455 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2021-05-06 06:23:22,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-06 06:23:22,455 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 06:23:22,456 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 06:23:22,674 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-06 06:23:22,674 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 06:23:22,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 06:23:22,674 INFO L82 PathProgramCache]: Analyzing trace with hash -2145658700, now seen corresponding path program 1 times [2021-05-06 06:23:22,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 06:23:22,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092360835] [2021-05-06 06:23:22,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 06:23:22,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:23:22,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 06:23:22,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:23:22,740 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:23:22,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 06:23:22,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092360835] [2021-05-06 06:23:22,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092360835] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:23:22,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837454780] [2021-05-06 06:23:22,741 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 [2021-05-06 06:23:22,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 06:23:22,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-06 06:23:22,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 06:23:22,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:23:22,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:23:22,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:23:22,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 06:23:22,915 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 06:23:22,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837454780] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 06:23:22,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-06 06:23:22,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-05-06 06:23:22,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687751360] [2021-05-06 06:23:22,916 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 06:23:22,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 06:23:22,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 06:23:22,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 06:23:22,917 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 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) [2021-05-06 06:23:23,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 06:23:23,056 INFO L93 Difference]: Finished difference Result 12 states and 13 transitions. [2021-05-06 06:23:23,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 06:23:23,057 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 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 [2021-05-06 06:23:23,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 06:23:23,057 INFO L225 Difference]: With dead ends: 12 [2021-05-06 06:23:23,057 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 06:23:23,057 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 137.5ms TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-05-06 06:23:23,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 06:23:23,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 06:23:23,058 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) [2021-05-06 06:23:23,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 06:23:23,058 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 15 [2021-05-06 06:23:23,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 06:23:23,058 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 06:23:23,058 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 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) [2021-05-06 06:23:23,058 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 06:23:23,058 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 06:23:23,272 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 06:23:23,275 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 06:23:23 BasicIcfg [2021-05-06 06:23:23,275 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 06:23:23,276 INFO L168 Benchmark]: Toolchain (without parser) took 2327.99 ms. Allocated memory was 205.5 MB in the beginning and 304.1 MB in the end (delta: 98.6 MB). Free memory was 171.4 MB in the beginning and 207.2 MB in the end (delta: -35.8 MB). Peak memory consumption was 64.2 MB. Max. memory is 8.0 GB. [2021-05-06 06:23:23,276 INFO L168 Benchmark]: CDTParser took 0.48 ms. Allocated memory is still 205.5 MB. Free memory is still 188.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 06:23:23,277 INFO L168 Benchmark]: CACSL2BoogieTranslator took 166.74 ms. Allocated memory is still 205.5 MB. Free memory was 171.2 MB in the beginning and 189.0 MB in the end (delta: -17.8 MB). Peak memory consumption was 10.9 MB. Max. memory is 8.0 GB. [2021-05-06 06:23:23,277 INFO L168 Benchmark]: Boogie Preprocessor took 32.45 ms. Allocated memory is still 205.5 MB. Free memory was 189.0 MB in the beginning and 187.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 06:23:23,277 INFO L168 Benchmark]: RCFGBuilder took 204.03 ms. Allocated memory is still 205.5 MB. Free memory was 187.6 MB in the beginning and 172.6 MB in the end (delta: 15.1 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-06 06:23:23,277 INFO L168 Benchmark]: IcfgTransformer took 208.05 ms. Allocated memory is still 205.5 MB. Free memory was 172.6 MB in the beginning and 149.9 MB in the end (delta: 22.7 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. [2021-05-06 06:23:23,277 INFO L168 Benchmark]: TraceAbstraction took 1710.36 ms. Allocated memory was 205.5 MB in the beginning and 304.1 MB in the end (delta: 98.6 MB). Free memory was 149.5 MB in the beginning and 207.2 MB in the end (delta: -57.7 MB). Peak memory consumption was 41.8 MB. Max. memory is 8.0 GB. [2021-05-06 06:23:23,278 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from IcfgTransformer: - StatisticsResult: Jordan loop acceleration statistics 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult - StatisticsResult: Jordan loop acceleration statistics 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.48 ms. Allocated memory is still 205.5 MB. Free memory is still 188.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 166.74 ms. Allocated memory is still 205.5 MB. Free memory was 171.2 MB in the beginning and 189.0 MB in the end (delta: -17.8 MB). Peak memory consumption was 10.9 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 32.45 ms. Allocated memory is still 205.5 MB. Free memory was 189.0 MB in the beginning and 187.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 204.03 ms. Allocated memory is still 205.5 MB. Free memory was 187.6 MB in the beginning and 172.6 MB in the end (delta: 15.1 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 208.05 ms. Allocated memory is still 205.5 MB. Free memory was 172.6 MB in the beginning and 149.9 MB in the end (delta: 22.7 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1710.36 ms. Allocated memory was 205.5 MB in the beginning and 304.1 MB in the end (delta: 98.6 MB). Free memory was 149.5 MB in the beginning and 207.2 MB in the end (delta: -57.7 MB). Peak memory consumption was 41.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: 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, 22 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1677.9ms, OverallIterations: 4, TraceHistogramMax: 1, EmptinessCheckTime: 8.6ms, AutomataDifference: 384.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 5.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 45 SDtfs, 46 SDslu, 51 SDs, 0 SdLazy, 117 SolverSat, 24 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 123.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 59 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 400.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred in iteration=0, InterpolantAutomatonStates: 19, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 18.6ms AutomataMinimizationTime, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 28.4ms SsaConstructionTime, 127.5ms SatisfiabilityAnalysisTime, 522.8ms InterpolantComputationTime, 88 NumberOfCodeBlocks, 88 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 82 ConstructedInterpolants, 0 QuantifiedInterpolants, 414 SizeOfPredicates, 7 NumberOfNonLiveVariables, 204 ConjunctsInSsa, 16 ConjunctsInUnsatCore, 6 InterpolantComputations, 2 PerfectInterpolantSequences, 0/4 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...