/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/loop-invgen/seq-3.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 18:09:10,001 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 18:09:10,004 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 18:09:10,040 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 18:09:10,040 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 18:09:10,043 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 18:09:10,046 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 18:09:10,051 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 18:09:10,053 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 18:09:10,057 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 18:09:10,058 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 18:09:10,059 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 18:09:10,060 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 18:09:10,061 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 18:09:10,063 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 18:09:10,064 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 18:09:10,066 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 18:09:10,067 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 18:09:10,069 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 18:09:10,074 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 18:09:10,076 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 18:09:10,077 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 18:09:10,077 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 18:09:10,079 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 18:09:10,085 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-05-02 18:09:10,086 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-05-02 18:09:10,086 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-05-02 18:09:10,088 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-05-02 18:09:10,088 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-05-02 18:09:10,089 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-05-02 18:09:10,089 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-02 18:09:10,091 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-02 18:09:10,093 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-02 18:09:10,093 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-02 18:09:10,094 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-02 18:09:10,095 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-02 18:09:10,095 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-02 18:09:10,095 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-02 18:09:10,096 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 18:09:10,096 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 18:09:10,097 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 18:09:10,101 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 18:09:10,116 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 18:09:10,117 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 18:09:10,119 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 18:09:10,120 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 18:09:10,120 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 18:09:10,120 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 18:09:10,120 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 18:09:10,120 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 18:09:10,120 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 18:09:10,121 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 18:09:10,121 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 18:09:10,122 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 18:09:10,122 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 18:09:10,122 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 18:09:10,122 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 18:09:10,122 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 18:09:10,123 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 18:09:10,123 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 18:09:10,123 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 18:09:10,123 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 18:09:10,123 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 18:09:10,125 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 18:09:10,125 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 18:09:10,440 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 18:09:10,470 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 18:09:10,473 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 18:09:10,474 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 18:09:10,474 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 18:09:10,475 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/seq-3.i [2021-05-02 18:09:10,537 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36bfc744b/7dd6673a2c754ca490af65140def5efe/FLAGc8d7b017c [2021-05-02 18:09:10,935 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 18:09:10,936 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/seq-3.i [2021-05-02 18:09:10,941 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36bfc744b/7dd6673a2c754ca490af65140def5efe/FLAGc8d7b017c [2021-05-02 18:09:10,961 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36bfc744b/7dd6673a2c754ca490af65140def5efe [2021-05-02 18:09:10,964 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 18:09:10,966 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 18:09:10,970 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 18:09:10,970 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 18:09:10,974 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 18:09:10,974 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 06:09:10" (1/1) ... [2021-05-02 18:09:10,975 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74896444 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:09:10, skipping insertion in model container [2021-05-02 18:09:10,975 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 06:09:10" (1/1) ... [2021-05-02 18:09:10,981 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 18:09:10,996 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 18:09:11,142 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/seq-3.i[893,906] [2021-05-02 18:09:11,157 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 18:09:11,164 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 18:09:11,176 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/seq-3.i[893,906] [2021-05-02 18:09:11,186 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 18:09:11,204 INFO L208 MainTranslator]: Completed translation [2021-05-02 18:09:11,205 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:09:11 WrapperNode [2021-05-02 18:09:11,205 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 18:09:11,206 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 18:09:11,206 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 18:09:11,206 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 18:09:11,232 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:09:11" (1/1) ... [2021-05-02 18:09:11,232 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:09:11" (1/1) ... [2021-05-02 18:09:11,238 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:09:11" (1/1) ... [2021-05-02 18:09:11,238 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:09:11" (1/1) ... [2021-05-02 18:09:11,267 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:09:11" (1/1) ... [2021-05-02 18:09:11,271 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:09:11" (1/1) ... [2021-05-02 18:09:11,276 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:09:11" (1/1) ... [2021-05-02 18:09:11,282 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 18:09:11,283 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 18:09:11,284 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 18:09:11,284 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 18:09:11,285 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:09:11" (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 18:09:11,358 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 18:09:11,358 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 18:09:11,358 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 18:09:11,358 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 18:09:11,358 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 18:09:11,359 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 18:09:11,359 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 18:09:11,359 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 18:09:11,359 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-02 18:09:11,359 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-02 18:09:11,359 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 18:09:11,360 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 18:09:11,360 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 18:09:11,360 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 18:09:11,360 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 18:09:11,360 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 18:09:11,360 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 18:09:11,361 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 18:09:11,361 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 18:09:11,361 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 18:09:11,362 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 18:09:11,362 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 18:09:11,663 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 18:09:11,663 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-05-02 18:09:11,664 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 06:09:11 BoogieIcfgContainer [2021-05-02 18:09:11,664 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 18:09:11,665 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 18:09:11,665 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 18:09:11,666 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 18:09:11,668 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 06:09:11" (1/1) ... [2021-05-02 18:09:11,732 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i0~0_2 v_main_~n0~0_1) InVars {main_~i0~0=v_main_~i0~0_2, main_~n0~0=v_main_~n0~0_1} OutVars{main_~i0~0=v_main_~i0~0_2, main_~n0~0=v_main_~n0~0_1} AuxVars[] AssignedVars[] [2021-05-02 18:09:11,774 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.1 percent of original size [2021-05-02 18:09:11,897 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.1 percent of original size 57 [2021-05-02 18:09:11,933 INFO L1112 elerationTransformer]: Accelerated Formula: (and (< v_main_~i0~0_2 v_main_~n0~0_1) (= (+ v_main_~k~0_2 1) v_main_~k~0_1) (= (+ v_main_~i0~0_2 1) v_main_~i0~0_1)) InVars {main_~k~0=v_main_~k~0_2, main_~i0~0=v_main_~i0~0_2, main_~n0~0=v_main_~n0~0_1} OutVars{main_~k~0=v_main_~k~0_1, main_#t~post5=|v_main_#t~post5_1|, main_~i0~0=v_main_~i0~0_1, main_~n0~0=v_main_~n0~0_1, main_#t~post6=|v_main_#t~post6_1|} AuxVars[] AssignedVars[main_~k~0, main_#t~post5, main_~i0~0, main_#t~post6] with Formula: (or (and (= v_itFin_1 0) (= |v_main_#t~post6_3| |v_main_#t~post6_1|) (= v_main_~k~0_2 v_main_~k~0_1) (<= v_main_~n0~0_1 v_main_~i0~0_2) (= |v_main_#t~post5_3| |v_main_#t~post5_1|) (= v_main_~i0~0_2 v_main_~i0~0_1)) (let ((.cse0 (+ v_itFin_1 v_main_~i0~0_2))) (and (= v_main_~k~0_1 (+ v_itFin_1 v_main_~k~0_2)) (< v_main_~i0~0_2 v_main_~n0~0_1) (< .cse0 (+ v_main_~n0~0_1 1)) (<= v_main_~n0~0_1 .cse0) (= v_main_~i0~0_1 .cse0)))) InVars {main_#t~post5=|v_main_#t~post5_3|, main_~i0~0=v_main_~i0~0_2, main_~n0~0=v_main_~n0~0_1, main_~k~0=v_main_~k~0_2, main_#t~post6=|v_main_#t~post6_3|} OutVars{main_#t~post5=|v_main_#t~post5_1|, main_~i0~0=v_main_~i0~0_1, main_~n0~0=v_main_~n0~0_1, main_~k~0=v_main_~k~0_1, main_#t~post6=|v_main_#t~post6_1|} AuxVars[v_itFin_1] AssignedVars[main_~k~0, main_#t~post5, main_~i0~0, main_#t~post6] [2021-05-02 18:09:11,949 INFO L181 rdanLoopAcceleration]: Guard: Formula: (< v_main_~i1~0_4 v_main_~n1~0_2) InVars {main_~n1~0=v_main_~n1~0_2, main_~i1~0=v_main_~i1~0_4} OutVars{main_~n1~0=v_main_~n1~0_2, main_~i1~0=v_main_~i1~0_4} AuxVars[] AssignedVars[] [2021-05-02 18:09:11,967 WARN L240 tifierPushTermWalker]: treesize reduction 7, result has 89.1 percent of original size [2021-05-02 18:09:12,055 WARN L245 tifierPushTermWalker]: treesize reduction 7, result has 89.1 percent of original size 57 [2021-05-02 18:09:12,083 INFO L1112 elerationTransformer]: Accelerated Formula: (and (= v_main_~k~0_3 (+ v_main_~k~0_4 1)) (< v_main_~i1~0_4 v_main_~n1~0_2) (= v_main_~i1~0_3 (+ v_main_~i1~0_4 1))) InVars {main_~n1~0=v_main_~n1~0_2, main_~i1~0=v_main_~i1~0_4, main_~k~0=v_main_~k~0_4} OutVars{main_~n1~0=v_main_~n1~0_2, main_~i1~0=v_main_~i1~0_3, main_~k~0=v_main_~k~0_3, main_#t~post8=|v_main_#t~post8_1|, main_#t~post7=|v_main_#t~post7_1|} AuxVars[] AssignedVars[main_~i1~0, main_~k~0, main_#t~post8, main_#t~post7] with Formula: (or (and (= |v_main_#t~post7_3| |v_main_#t~post7_1|) (= |v_main_#t~post8_3| |v_main_#t~post8_1|) (= v_main_~i1~0_3 v_main_~i1~0_4) (<= v_main_~n1~0_2 v_main_~i1~0_4) (= v_itFin_2 0) (= v_main_~k~0_4 v_main_~k~0_3)) (let ((.cse0 (+ v_itFin_2 v_main_~i1~0_4))) (and (= v_main_~i1~0_3 .cse0) (= (+ v_itFin_2 v_main_~k~0_4) v_main_~k~0_3) (< .cse0 (+ v_main_~n1~0_2 1)) (< v_main_~i1~0_4 v_main_~n1~0_2) (<= v_main_~n1~0_2 .cse0)))) InVars {main_~n1~0=v_main_~n1~0_2, main_#t~post8=|v_main_#t~post8_3|, main_~i1~0=v_main_~i1~0_4, main_~k~0=v_main_~k~0_4, main_#t~post7=|v_main_#t~post7_3|} OutVars{main_~n1~0=v_main_~n1~0_2, main_#t~post8=|v_main_#t~post8_1|, main_~i1~0=v_main_~i1~0_3, main_~k~0=v_main_~k~0_3, main_#t~post7=|v_main_#t~post7_1|} AuxVars[v_itFin_2] AssignedVars[main_~i1~0, main_~k~0, main_#t~post8, main_#t~post7] [2021-05-02 18:09:12,089 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 06:09:12 BasicIcfg [2021-05-02 18:09:12,089 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 18:09:12,091 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 18:09:12,091 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 18:09:12,093 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 18:09:12,093 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 06:09:10" (1/4) ... [2021-05-02 18:09:12,094 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63c86812 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 06:09:12, skipping insertion in model container [2021-05-02 18:09:12,094 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:09:11" (2/4) ... [2021-05-02 18:09:12,095 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63c86812 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 06:09:12, skipping insertion in model container [2021-05-02 18:09:12,096 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 06:09:11" (3/4) ... [2021-05-02 18:09:12,097 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63c86812 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 06:09:12, skipping insertion in model container [2021-05-02 18:09:12,098 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 06:09:12" (4/4) ... [2021-05-02 18:09:12,099 INFO L111 eAbstractionObserver]: Analyzing ICFG seq-3.iJordan [2021-05-02 18:09:12,103 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 18:09:12,107 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 18:09:12,121 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 18:09:12,143 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 18:09:12,143 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 18:09:12,143 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 18:09:12,144 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 18:09:12,144 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 18:09:12,144 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 18:09:12,144 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 18:09:12,144 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 18:09:12,158 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 17 states have (on average 1.588235294117647) internal successors, (27), 18 states have internal predecessors, (27), 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 18:09:12,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 18:09:12,165 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:09:12,165 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 18:09:12,166 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:09:12,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:09:12,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1622270520, now seen corresponding path program 1 times [2021-05-02 18:09:12,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:09:12,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783117134] [2021-05-02 18:09:12,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:09:12,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:09:12,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:09:12,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:09:12,366 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 18:09:12,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:09:12,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783117134] [2021-05-02 18:09:12,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783117134] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 18:09:12,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 18:09:12,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 18:09:12,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214265775] [2021-05-02 18:09:12,373 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 18:09:12,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:09:12,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 18:09:12,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 18:09:12,388 INFO L87 Difference]: Start difference. First operand has 25 states, 17 states have (on average 1.588235294117647) internal successors, (27), 18 states have internal predecessors, (27), 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 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 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 18:09:12,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:09:12,425 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2021-05-02 18:09:12,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 18:09:12,427 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 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 17 [2021-05-02 18:09:12,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:09:12,433 INFO L225 Difference]: With dead ends: 25 [2021-05-02 18:09:12,433 INFO L226 Difference]: Without dead ends: 21 [2021-05-02 18:09:12,435 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 18:09:12,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-05-02 18:09:12,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-05-02 18:09:12,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 18:09:12,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2021-05-02 18:09:12,461 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 17 [2021-05-02 18:09:12,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:09:12,462 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2021-05-02 18:09:12,462 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 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 18:09:12,462 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2021-05-02 18:09:12,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 18:09:12,463 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:09:12,463 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 18:09:12,464 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 18:09:12,464 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:09:12,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:09:12,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1752745994, now seen corresponding path program 1 times [2021-05-02 18:09:12,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:09:12,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92190901] [2021-05-02 18:09:12,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:09:12,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:09:12,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:09:12,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:09:12,630 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 18:09:12,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:09:12,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92190901] [2021-05-02 18:09:12,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92190901] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 18:09:12,631 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 18:09:12,631 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 18:09:12,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140058588] [2021-05-02 18:09:12,632 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 18:09:12,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:09:12,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 18:09:12,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-02 18:09:12,633 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 8 states, 8 states have (on average 1.625) internal successors, (13), 7 states have internal predecessors, (13), 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 18:09:12,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:09:12,912 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2021-05-02 18:09:12,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 18:09:12,913 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 7 states have internal predecessors, (13), 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 17 [2021-05-02 18:09:12,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:09:12,916 INFO L225 Difference]: With dead ends: 31 [2021-05-02 18:09:12,916 INFO L226 Difference]: Without dead ends: 29 [2021-05-02 18:09:12,918 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 237.0ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-05-02 18:09:12,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-02 18:09:12,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 24. [2021-05-02 18:09:12,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 18:09:12,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-05-02 18:09:12,928 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 17 [2021-05-02 18:09:12,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:09:12,931 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-05-02 18:09:12,931 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 7 states have internal predecessors, (13), 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 18:09:12,932 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-05-02 18:09:12,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 18:09:12,932 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:09:12,937 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:09:12,938 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 18:09:12,938 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:09:12,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:09:12,938 INFO L82 PathProgramCache]: Analyzing trace with hash -1618517526, now seen corresponding path program 1 times [2021-05-02 18:09:12,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:09:12,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915132947] [2021-05-02 18:09:12,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:09:12,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:09:13,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:09:13,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:09:13,140 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 18:09:13,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:09:13,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915132947] [2021-05-02 18:09:13,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915132947] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:09:13,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273626307] [2021-05-02 18:09:13,141 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 18:09:13,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:09:13,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-02 18:09:13,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:09:13,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:13,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:13,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:13,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:13,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:13,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:13,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:13,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:13,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:13,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:13,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:13,449 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 18:09:13,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273626307] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:09:13,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:09:13,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-05-02 18:09:13,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812502918] [2021-05-02 18:09:13,451 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-02 18:09:13,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:09:13,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-02 18:09:13,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-05-02 18:09:13,452 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 19 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 16 states have internal predecessors, (26), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:09:14,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:09:14,066 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2021-05-02 18:09:14,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 18:09:14,066 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 16 states have internal predecessors, (26), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-05-02 18:09:14,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:09:14,067 INFO L225 Difference]: With dead ends: 36 [2021-05-02 18:09:14,067 INFO L226 Difference]: Without dead ends: 36 [2021-05-02 18:09:14,068 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 648.9ms TimeCoverageRelationStatistics Valid=136, Invalid=676, Unknown=0, NotChecked=0, Total=812 [2021-05-02 18:09:14,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-02 18:09:14,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2021-05-02 18:09:14,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 25 states have internal predecessors, (29), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 18:09:14,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2021-05-02 18:09:14,073 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 18 [2021-05-02 18:09:14,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:09:14,073 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2021-05-02 18:09:14,073 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 16 states have internal predecessors, (26), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:09:14,073 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2021-05-02 18:09:14,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 18:09:14,074 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:09:14,074 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:09:14,289 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-02 18:09:14,289 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:09:14,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:09:14,290 INFO L82 PathProgramCache]: Analyzing trace with hash 866414186, now seen corresponding path program 1 times [2021-05-02 18:09:14,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:09:14,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235980553] [2021-05-02 18:09:14,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:09:14,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:09:14,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:09:14,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:09:14,444 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 18:09:14,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:09:14,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235980553] [2021-05-02 18:09:14,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235980553] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:09:14,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289887221] [2021-05-02 18:09:14,445 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 18:09:14,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:09:14,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-02 18:09:14,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:09:14,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:14,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:14,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:14,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:14,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:14,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:14,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:14,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:14,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:14,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:14,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:14,740 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:09:14,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289887221] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:09:14,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:09:14,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-05-02 18:09:14,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610238472] [2021-05-02 18:09:14,742 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 18:09:14,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:09:14,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 18:09:14,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-05-02 18:09:14,747 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 15 states have internal predecessors, (26), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:09:15,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:09:15,832 INFO L93 Difference]: Finished difference Result 48 states and 55 transitions. [2021-05-02 18:09:15,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-02 18:09:15,832 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 15 states have internal predecessors, (26), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-05-02 18:09:15,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:09:15,834 INFO L225 Difference]: With dead ends: 48 [2021-05-02 18:09:15,834 INFO L226 Difference]: Without dead ends: 48 [2021-05-02 18:09:15,835 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 1076.3ms TimeCoverageRelationStatistics Valid=226, Invalid=1034, Unknown=0, NotChecked=0, Total=1260 [2021-05-02 18:09:15,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-02 18:09:15,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 30. [2021-05-02 18:09:15,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 18:09:15,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2021-05-02 18:09:15,840 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 18 [2021-05-02 18:09:15,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:09:15,840 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2021-05-02 18:09:15,840 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 15 states have internal predecessors, (26), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:09:15,840 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2021-05-02 18:09:15,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-02 18:09:15,841 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:09:15,841 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:09:16,057 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:09:16,058 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:09:16,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:09:16,058 INFO L82 PathProgramCache]: Analyzing trace with hash 760418478, now seen corresponding path program 1 times [2021-05-02 18:09:16,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:09:16,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740533304] [2021-05-02 18:09:16,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:09:16,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:09:16,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:09:16,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:09:16,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-05-02 18:09:16,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:09:16,216 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:09:16,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:09:16,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740533304] [2021-05-02 18:09:16,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740533304] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:09:16,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482180723] [2021-05-02 18:09:16,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:09:16,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:09:16,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 18:09:16,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:09:16,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:16,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:16,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:16,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:16,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:16,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:16,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:16,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:16,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:16,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:16,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:16,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:16,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:16,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:16,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:16,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:16,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:16,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:16,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:16,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:16,581 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:09:16,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482180723] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:09:16,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:09:16,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2021-05-02 18:09:16,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709468919] [2021-05-02 18:09:16,582 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 18:09:16,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:09:16,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 18:09:16,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-05-02 18:09:16,583 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 22 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 19 states have internal predecessors, (36), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 18:09:17,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:09:17,355 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2021-05-02 18:09:17,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 18:09:17,356 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 19 states have internal predecessors, (36), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 25 [2021-05-02 18:09:17,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:09:17,357 INFO L225 Difference]: With dead ends: 49 [2021-05-02 18:09:17,357 INFO L226 Difference]: Without dead ends: 28 [2021-05-02 18:09:17,358 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 772.6ms TimeCoverageRelationStatistics Valid=174, Invalid=1158, Unknown=0, NotChecked=0, Total=1332 [2021-05-02 18:09:17,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-05-02 18:09:17,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-05-02 18:09:17,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 18:09:17,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2021-05-02 18:09:17,361 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 25 [2021-05-02 18:09:17,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:09:17,361 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2021-05-02 18:09:17,362 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 19 states have internal predecessors, (36), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 18:09:17,362 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2021-05-02 18:09:17,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-02 18:09:17,362 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:09:17,362 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:09:17,569 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-02 18:09:17,569 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:09:17,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:09:17,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1387858898, now seen corresponding path program 1 times [2021-05-02 18:09:17,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:09:17,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343618703] [2021-05-02 18:09:17,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:09:17,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:09:17,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:09:17,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:09:17,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-05-02 18:09:17,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:09:17,726 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:09:17,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:09:17,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343618703] [2021-05-02 18:09:17,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343618703] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:09:17,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510857171] [2021-05-02 18:09:17,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:09:17,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:09:17,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 18:09:17,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:09:17,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:17,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:17,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:17,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:17,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:17,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:17,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:17,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:17,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:17,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:17,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:17,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:17,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:17,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:17,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:17,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:17,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:18,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:18,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:18,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:18,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:18,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:18,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:18,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:09:18,130 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:09:18,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510857171] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:09:18,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:09:18,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 22 [2021-05-02 18:09:18,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131361352] [2021-05-02 18:09:18,131 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 18:09:18,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:09:18,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 18:09:18,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-05-02 18:09:18,132 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 22 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 19 states have internal predecessors, (36), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 18:09:19,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:09:19,024 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2021-05-02 18:09:19,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 18:09:19,025 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 19 states have internal predecessors, (36), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 25 [2021-05-02 18:09:19,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:09:19,025 INFO L225 Difference]: With dead ends: 35 [2021-05-02 18:09:19,025 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 18:09:19,026 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 966.9ms TimeCoverageRelationStatistics Valid=207, Invalid=1125, Unknown=0, NotChecked=0, Total=1332 [2021-05-02 18:09:19,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 18:09:19,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 18:09:19,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-02 18:09:19,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 18:09:19,026 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 25 [2021-05-02 18:09:19,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:09:19,026 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 18:09:19,027 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 19 states have internal predecessors, (36), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 18:09:19,027 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 18:09:19,027 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 18:09:19,240 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:09:19,243 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 06:09:19 BasicIcfg [2021-05-02 18:09:19,243 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 18:09:19,244 INFO L168 Benchmark]: Toolchain (without parser) took 8278.37 ms. Allocated memory was 190.8 MB in the beginning and 282.1 MB in the end (delta: 91.2 MB). Free memory was 156.0 MB in the beginning and 194.9 MB in the end (delta: -38.9 MB). Peak memory consumption was 52.9 MB. Max. memory is 8.0 GB. [2021-05-02 18:09:19,244 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 190.8 MB. Free memory is still 172.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 18:09:19,244 INFO L168 Benchmark]: CACSL2BoogieTranslator took 235.22 ms. Allocated memory is still 190.8 MB. Free memory was 155.8 MB in the beginning and 146.2 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-02 18:09:19,244 INFO L168 Benchmark]: Boogie Preprocessor took 75.81 ms. Allocated memory is still 190.8 MB. Free memory was 146.0 MB in the beginning and 174.0 MB in the end (delta: -27.9 MB). Peak memory consumption was 3.4 MB. Max. memory is 8.0 GB. [2021-05-02 18:09:19,244 INFO L168 Benchmark]: RCFGBuilder took 381.06 ms. Allocated memory is still 190.8 MB. Free memory was 174.0 MB in the beginning and 157.7 MB in the end (delta: 16.3 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-02 18:09:19,244 INFO L168 Benchmark]: IcfgTransformer took 424.18 ms. Allocated memory is still 190.8 MB. Free memory was 157.7 MB in the beginning and 130.4 MB in the end (delta: 27.3 MB). Peak memory consumption was 27.3 MB. Max. memory is 8.0 GB. [2021-05-02 18:09:19,245 INFO L168 Benchmark]: TraceAbstraction took 7152.61 ms. Allocated memory was 190.8 MB in the beginning and 282.1 MB in the end (delta: 91.2 MB). Free memory was 129.9 MB in the beginning and 194.9 MB in the end (delta: -65.0 MB). Peak memory consumption was 27.5 MB. Max. memory is 8.0 GB. [2021-05-02 18:09:19,245 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from IcfgTransformer: - StatisticsResult: Jordan loop acceleration statistics 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult - StatisticsResult: Jordan loop acceleration statistics 2 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 0.12 ms. Allocated memory is still 190.8 MB. Free memory is still 172.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 235.22 ms. Allocated memory is still 190.8 MB. Free memory was 155.8 MB in the beginning and 146.2 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 75.81 ms. Allocated memory is still 190.8 MB. Free memory was 146.0 MB in the beginning and 174.0 MB in the end (delta: -27.9 MB). Peak memory consumption was 3.4 MB. Max. memory is 8.0 GB. * RCFGBuilder took 381.06 ms. Allocated memory is still 190.8 MB. Free memory was 174.0 MB in the beginning and 157.7 MB in the end (delta: 16.3 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 424.18 ms. Allocated memory is still 190.8 MB. Free memory was 157.7 MB in the beginning and 130.4 MB in the end (delta: 27.3 MB). Peak memory consumption was 27.3 MB. Max. memory is 8.0 GB. * TraceAbstraction took 7152.61 ms. Allocated memory was 190.8 MB in the beginning and 282.1 MB in the end (delta: 91.2 MB). Free memory was 129.9 MB in the beginning and 194.9 MB in the end (delta: -65.0 MB). Peak memory consumption was 27.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 19]: 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, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 7100.6ms, OverallIterations: 6, TraceHistogramMax: 2, EmptinessCheckTime: 13.7ms, AutomataDifference: 3723.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 9.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 95 SDtfs, 298 SDslu, 257 SDs, 0 SdLazy, 1104 SolverSat, 180 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 757.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 217 GetRequests, 70 SyntacticMatches, 4 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 972 ImplicationChecksByTransitivity, 3732.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=3, InterpolantAutomatonStates: 81, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 38.4ms AutomataMinimizationTime, 6 MinimizatonAttempts, 27 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 51.0ms SsaConstructionTime, 163.8ms SatisfiabilityAnalysisTime, 2028.7ms InterpolantComputationTime, 206 NumberOfCodeBlocks, 206 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 196 ConstructedInterpolants, 0 QuantifiedInterpolants, 1266 SizeOfPredicates, 34 NumberOfNonLiveVariables, 396 ConjunctsInSsa, 67 ConjunctsInUnsatCore, 10 InterpolantComputations, 2 PerfectInterpolantSequences, 6/24 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...