/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/nested9.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 18:08:48,108 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 18:08:48,111 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 18:08:48,151 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 18:08:48,151 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 18:08:48,155 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 18:08:48,159 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 18:08:48,168 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 18:08:48,169 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 18:08:48,170 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 18:08:48,170 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 18:08:48,171 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 18:08:48,172 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 18:08:48,172 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 18:08:48,173 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 18:08:48,174 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 18:08:48,175 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 18:08:48,176 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 18:08:48,177 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 18:08:48,178 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 18:08:48,180 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 18:08:48,181 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 18:08:48,182 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 18:08:48,182 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 18:08:48,185 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-05-02 18:08:48,185 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-05-02 18:08:48,185 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-05-02 18:08:48,186 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-05-02 18:08:48,186 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-05-02 18:08:48,187 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-05-02 18:08:48,187 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-02 18:08:48,188 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-02 18:08:48,188 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-02 18:08:48,189 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-02 18:08:48,197 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-02 18:08:48,197 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-02 18:08:48,198 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-02 18:08:48,198 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-02 18:08:48,198 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 18:08:48,199 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 18:08:48,200 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 18:08:48,201 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 18:08:48,213 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 18:08:48,213 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 18:08:48,214 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 18:08:48,215 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 18:08:48,215 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 18:08:48,215 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 18:08:48,215 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 18:08:48,215 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 18:08:48,215 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 18:08:48,216 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 18:08:48,216 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 18:08:48,216 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 18:08:48,216 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 18:08:48,216 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 18:08:48,219 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 18:08:48,219 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 18:08:48,219 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 18:08:48,220 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 18:08:48,220 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 18:08:48,220 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 18:08:48,220 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 18:08:48,221 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 18:08:48,221 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 18:08:48,538 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 18:08:48,555 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 18:08:48,557 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 18:08:48,558 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 18:08:48,558 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 18:08:48,559 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/nested9.i [2021-05-02 18:08:48,611 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8df737d98/04d3632a853f435dbd0c445ae765cabf/FLAGe69b7f9c4 [2021-05-02 18:08:49,149 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 18:08:49,150 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/nested9.i [2021-05-02 18:08:49,157 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8df737d98/04d3632a853f435dbd0c445ae765cabf/FLAGe69b7f9c4 [2021-05-02 18:08:49,622 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8df737d98/04d3632a853f435dbd0c445ae765cabf [2021-05-02 18:08:49,625 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 18:08:49,626 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 18:08:49,645 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 18:08:49,645 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 18:08:49,648 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 18:08:49,649 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 06:08:49" (1/1) ... [2021-05-02 18:08:49,650 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@351030ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:08:49, skipping insertion in model container [2021-05-02 18:08:49,650 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 06:08:49" (1/1) ... [2021-05-02 18:08:49,658 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 18:08:49,670 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 18:08:49,771 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/nested9.i[893,906] [2021-05-02 18:08:49,782 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 18:08:49,789 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 18:08:49,799 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/nested9.i[893,906] [2021-05-02 18:08:49,803 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 18:08:49,834 INFO L208 MainTranslator]: Completed translation [2021-05-02 18:08:49,835 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:08:49 WrapperNode [2021-05-02 18:08:49,835 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 18:08:49,846 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 18:08:49,846 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 18:08:49,846 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 18:08:49,854 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:08:49" (1/1) ... [2021-05-02 18:08:49,854 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:08:49" (1/1) ... [2021-05-02 18:08:49,861 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:08:49" (1/1) ... [2021-05-02 18:08:49,861 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:08:49" (1/1) ... [2021-05-02 18:08:49,873 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:08:49" (1/1) ... [2021-05-02 18:08:49,878 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:08:49" (1/1) ... [2021-05-02 18:08:49,882 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:08:49" (1/1) ... [2021-05-02 18:08:49,887 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 18:08:49,889 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 18:08:49,889 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 18:08:49,890 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 18:08:49,890 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:08:49" (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 18:08:49,962 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 18:08:49,963 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 18:08:49,963 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 18:08:49,963 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 18:08:49,963 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 18:08:49,963 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 18:08:49,963 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 18:08:49,964 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 18:08:49,964 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-02 18:08:49,964 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-02 18:08:49,964 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 18:08:49,964 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 18:08:49,964 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 18:08:49,965 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 18:08:49,965 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 18:08:49,965 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 18:08:49,965 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 18:08:49,965 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 18:08:49,966 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 18:08:49,966 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 18:08:49,966 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 18:08:49,967 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 18:08:50,262 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 18:08:50,262 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-05-02 18:08:50,263 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 06:08:50 BoogieIcfgContainer [2021-05-02 18:08:50,264 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 18:08:50,264 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 18:08:50,264 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 18:08:50,265 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 18:08:50,267 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 06:08:50" (1/1) ... [2021-05-02 18:08:50,287 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 06:08:50 BasicIcfg [2021-05-02 18:08:50,287 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 18:08:50,289 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 18:08:50,289 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 18:08:50,291 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 18:08:50,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 06:08:49" (1/4) ... [2021-05-02 18:08:50,292 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72fb87d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 06:08:50, skipping insertion in model container [2021-05-02 18:08:50,292 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 06:08:49" (2/4) ... [2021-05-02 18:08:50,292 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72fb87d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 06:08:50, skipping insertion in model container [2021-05-02 18:08:50,292 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 06:08:50" (3/4) ... [2021-05-02 18:08:50,293 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72fb87d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 06:08:50, skipping insertion in model container [2021-05-02 18:08:50,293 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 06:08:50" (4/4) ... [2021-05-02 18:08:50,294 INFO L111 eAbstractionObserver]: Analyzing ICFG nested9.iJordan [2021-05-02 18:08:50,298 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 18:08:50,301 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 18:08:50,315 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 18:08:50,331 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 18:08:50,331 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 18:08:50,331 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 18:08:50,331 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 18:08:50,331 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 18:08:50,332 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 18:08:50,332 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 18:08:50,332 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 18:08:50,343 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 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 18:08:50,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 18:08:50,348 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:08:50,349 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 18:08:50,349 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:08:50,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:08:50,354 INFO L82 PathProgramCache]: Analyzing trace with hash -340968139, now seen corresponding path program 1 times [2021-05-02 18:08:50,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:08:50,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127175916] [2021-05-02 18:08:50,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:08:50,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:08:50,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:08:50,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:08:50,685 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 18:08:50,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:08:50,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127175916] [2021-05-02 18:08:50,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127175916] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 18:08:50,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 18:08:50,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 18:08:50,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139643027] [2021-05-02 18:08:50,698 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 18:08:50,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:08:50,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 18:08:50,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-02 18:08:50,714 INFO L87 Difference]: Start difference. First operand has 29 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 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 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 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 18:08:51,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:08:51,188 INFO L93 Difference]: Finished difference Result 49 states and 61 transitions. [2021-05-02 18:08:51,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 18:08:51,194 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 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 18 [2021-05-02 18:08:51,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:08:51,200 INFO L225 Difference]: With dead ends: 49 [2021-05-02 18:08:51,200 INFO L226 Difference]: Without dead ends: 41 [2021-05-02 18:08:51,203 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 282.1ms TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-05-02 18:08:51,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-02 18:08:51,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 36. [2021-05-02 18:08:51,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 28 states have internal predecessors, (33), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 18:08:51,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2021-05-02 18:08:51,232 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 18 [2021-05-02 18:08:51,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:08:51,232 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2021-05-02 18:08:51,232 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 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 18:08:51,232 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2021-05-02 18:08:51,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-02 18:08:51,233 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:08:51,233 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:08:51,234 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 18:08:51,234 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:08:51,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:08:51,235 INFO L82 PathProgramCache]: Analyzing trace with hash 1058544685, now seen corresponding path program 1 times [2021-05-02 18:08:51,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:08:51,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494063709] [2021-05-02 18:08:51,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:08:51,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:08:51,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:08:51,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:08:51,433 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:08:51,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:08:51,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494063709] [2021-05-02 18:08:51,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494063709] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:08:51,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844327349] [2021-05-02 18:08:51,434 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 18:08:51,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:08:51,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-02 18:08:51,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:08:51,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:08:51,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:08:51,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:08:51,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:08:51,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:08:51,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:08:51,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:08:51,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:08:51,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:08:51,807 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:08:51,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844327349] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 18:08:51,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-05-02 18:08:51,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 16 [2021-05-02 18:08:51,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672655748] [2021-05-02 18:08:51,809 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 18:08:51,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:08:51,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 18:08:51,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-05-02 18:08:51,811 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:08:51,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:08:51,889 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2021-05-02 18:08:51,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 18:08:51,892 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-05-02 18:08:51,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:08:51,895 INFO L225 Difference]: With dead ends: 47 [2021-05-02 18:08:51,895 INFO L226 Difference]: Without dead ends: 47 [2021-05-02 18:08:51,896 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 199.4ms TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-05-02 18:08:51,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-02 18:08:51,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 30. [2021-05-02 18:08:51,906 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 18:08:51,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2021-05-02 18:08:51,913 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 21 [2021-05-02 18:08:51,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:08:51,913 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2021-05-02 18:08:51,913 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 18:08:51,913 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2021-05-02 18:08:51,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-02 18:08:51,914 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:08:51,914 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 18:08:52,117 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 18:08:52,117 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:08:52,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:08:52,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1484070290, now seen corresponding path program 1 times [2021-05-02 18:08:52,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:08:52,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133422731] [2021-05-02 18:08:52,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:08:52,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:08:52,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:08:52,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:08:52,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-05-02 18:08:52,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:08:52,252 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:08:52,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:08:52,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133422731] [2021-05-02 18:08:52,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133422731] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:08:52,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717572180] [2021-05-02 18:08:52,253 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 18:08:52,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:08:52,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-02 18:08:52,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:08:52,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:08:52,427 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 18:08:52,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717572180] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 18:08:52,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-05-02 18:08:52,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 11 [2021-05-02 18:08:52,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771716106] [2021-05-02 18:08:52,428 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 18:08:52,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:08:52,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 18:08:52,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-02 18:08:52,429 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 2 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 18:08:52,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:08:52,447 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2021-05-02 18:08:52,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 18:08:52,447 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2021-05-02 18:08:52,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:08:52,448 INFO L225 Difference]: With dead ends: 33 [2021-05-02 18:08:52,448 INFO L226 Difference]: Without dead ends: 33 [2021-05-02 18:08:52,449 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 75.2ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-02 18:08:52,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-02 18:08:52,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2021-05-02 18:08:52,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 25 states have internal predecessors, (28), 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 18:08:52,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2021-05-02 18:08:52,452 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 25 [2021-05-02 18:08:52,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:08:52,452 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2021-05-02 18:08:52,452 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 2 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 18:08:52,452 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2021-05-02 18:08:52,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 18:08:52,453 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:08:52,453 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:08:52,669 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:08:52,670 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:08:52,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:08:52,670 INFO L82 PathProgramCache]: Analyzing trace with hash 551024538, now seen corresponding path program 1 times [2021-05-02 18:08:52,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:08:52,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916145187] [2021-05-02 18:08:52,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:08:52,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:08:52,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:08:52,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:08:52,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 18:08:52,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:08:52,822 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:08:52,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:08:52,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916145187] [2021-05-02 18:08:52,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916145187] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:08:52,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101063157] [2021-05-02 18:08:52,822 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 18:08:52,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:08:52,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-02 18:08:52,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:08:52,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:08:52,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:08:52,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:08:52,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:08:52,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:08:53,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:08:53,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:08:53,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:08:53,068 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 18:08:53,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101063157] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:08:53,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:08:53,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-05-02 18:08:53,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820306251] [2021-05-02 18:08:53,069 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 18:08:53,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:08:53,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 18:08:53,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-02 18:08:53,070 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 18:08:53,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:08:53,609 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2021-05-02 18:08:53,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 18:08:53,610 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2021-05-02 18:08:53,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:08:53,611 INFO L225 Difference]: With dead ends: 47 [2021-05-02 18:08:53,611 INFO L226 Difference]: Without dead ends: 47 [2021-05-02 18:08:53,611 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 479.9ms TimeCoverageRelationStatistics Valid=119, Invalid=343, Unknown=0, NotChecked=0, Total=462 [2021-05-02 18:08:53,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-02 18:08:53,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2021-05-02 18:08:53,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 32 states have (on average 1.21875) internal successors, (39), 33 states have internal predecessors, (39), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 18:08:53,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2021-05-02 18:08:53,616 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 28 [2021-05-02 18:08:53,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:08:53,616 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2021-05-02 18:08:53,616 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 18:08:53,616 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2021-05-02 18:08:53,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 18:08:53,617 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:08:53,617 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 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 18:08:53,837 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:08:53,837 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:08:53,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:08:53,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1358482081, now seen corresponding path program 1 times [2021-05-02 18:08:53,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:08:53,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219192823] [2021-05-02 18:08:53,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:08:53,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:08:53,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:08:53,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:08:53,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-05-02 18:08:53,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:08:53,953 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-05-02 18:08:53,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:08:53,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219192823] [2021-05-02 18:08:53,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219192823] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:08:53,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017929386] [2021-05-02 18:08:53,954 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 18:08:54,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:08:54,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 18:08:54,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:08:54,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:08:54,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:08:54,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:08:54,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:08:54,139 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-02 18:08:54,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017929386] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 18:08:54,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-05-02 18:08:54,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 13 [2021-05-02 18:08:54,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609668726] [2021-05-02 18:08:54,141 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 18:08:54,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:08:54,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 18:08:54,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-05-02 18:08:54,142 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (3), 2 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 18:08:54,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:08:54,193 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2021-05-02 18:08:54,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 18:08:54,194 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 34 [2021-05-02 18:08:54,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:08:54,195 INFO L225 Difference]: With dead ends: 43 [2021-05-02 18:08:54,195 INFO L226 Difference]: Without dead ends: 43 [2021-05-02 18:08:54,196 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 107.0ms TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-05-02 18:08:54,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-02 18:08:54,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2021-05-02 18:08:54,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 32 states have (on average 1.15625) internal successors, (37), 33 states have internal predecessors, (37), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 18:08:54,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2021-05-02 18:08:54,199 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 34 [2021-05-02 18:08:54,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:08:54,200 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2021-05-02 18:08:54,200 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (3), 2 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 18:08:54,200 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2021-05-02 18:08:54,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 18:08:54,201 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 18:08:54,201 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 18:08:54,419 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:08:54,419 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 18:08:54,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 18:08:54,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1686349908, now seen corresponding path program 2 times [2021-05-02 18:08:54,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 18:08:54,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152746596] [2021-05-02 18:08:54,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 18:08:54,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:08:54,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 18:08:54,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:08:54,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 18:08:54,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:08:54,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-05-02 18:08:54,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 18:08:54,561 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-05-02 18:08:54,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 18:08:54,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152746596] [2021-05-02 18:08:54,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152746596] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:08:54,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629814849] [2021-05-02 18:08:54,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:08:54,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-05-02 18:08:54,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 18:08:54,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 18:08:54,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 18:08:54,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:08:54,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:08:54,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:08:54,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:08:54,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:08:54,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:08:54,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:08:54,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 18:08:54,797 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-05-02 18:08:54,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629814849] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 18:08:54,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 18:08:54,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 15 [2021-05-02 18:08:54,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039749488] [2021-05-02 18:08:54,798 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 18:08:54,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 18:08:54,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 18:08:54,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-05-02 18:08:54,799 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand has 15 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 6 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 18:08:55,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 18:08:55,194 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2021-05-02 18:08:55,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 18:08:55,195 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 6 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 41 [2021-05-02 18:08:55,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 18:08:55,196 INFO L225 Difference]: With dead ends: 40 [2021-05-02 18:08:55,196 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 18:08:55,196 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 409.2ms TimeCoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2021-05-02 18:08:55,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 18:08:55,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 18:08:55,197 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 18:08:55,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 18:08:55,197 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 41 [2021-05-02 18:08:55,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 18:08:55,197 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 18:08:55,197 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 6 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 18:08:55,198 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 18:08:55,198 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 18:08:55,400 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 18:08:55,404 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 06:08:55 BasicIcfg [2021-05-02 18:08:55,404 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 18:08:55,405 INFO L168 Benchmark]: Toolchain (without parser) took 5779.09 ms. Allocated memory was 183.5 MB in the beginning and 220.2 MB in the end (delta: 36.7 MB). Free memory was 149.2 MB in the beginning and 110.3 MB in the end (delta: 38.9 MB). Peak memory consumption was 77.0 MB. Max. memory is 8.0 GB. [2021-05-02 18:08:55,405 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 183.5 MB. Free memory is still 165.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 18:08:55,405 INFO L168 Benchmark]: CACSL2BoogieTranslator took 190.63 ms. Allocated memory is still 183.5 MB. Free memory was 149.0 MB in the beginning and 167.7 MB in the end (delta: -18.7 MB). Peak memory consumption was 13.8 MB. Max. memory is 8.0 GB. [2021-05-02 18:08:55,405 INFO L168 Benchmark]: Boogie Preprocessor took 41.89 ms. Allocated memory is still 183.5 MB. Free memory was 167.7 MB in the beginning and 166.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 18:08:55,405 INFO L168 Benchmark]: RCFGBuilder took 374.91 ms. Allocated memory is still 183.5 MB. Free memory was 166.1 MB in the beginning and 149.3 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-05-02 18:08:55,406 INFO L168 Benchmark]: IcfgTransformer took 23.07 ms. Allocated memory is still 183.5 MB. Free memory was 149.3 MB in the beginning and 147.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 18:08:55,406 INFO L168 Benchmark]: TraceAbstraction took 5115.78 ms. Allocated memory was 183.5 MB in the beginning and 220.2 MB in the end (delta: 36.7 MB). Free memory was 147.2 MB in the beginning and 110.3 MB in the end (delta: 36.9 MB). Peak memory consumption was 74.7 MB. Max. memory is 8.0 GB. [2021-05-02 18:08:55,406 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 183.5 MB. Free memory is still 165.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 190.63 ms. Allocated memory is still 183.5 MB. Free memory was 149.0 MB in the beginning and 167.7 MB in the end (delta: -18.7 MB). Peak memory consumption was 13.8 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 41.89 ms. Allocated memory is still 183.5 MB. Free memory was 167.7 MB in the beginning and 166.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 374.91 ms. Allocated memory is still 183.5 MB. Free memory was 166.1 MB in the beginning and 149.3 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * IcfgTransformer took 23.07 ms. Allocated memory is still 183.5 MB. Free memory was 149.3 MB in the beginning and 147.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 5115.78 ms. Allocated memory was 183.5 MB in the beginning and 220.2 MB in the end (delta: 36.7 MB). Free memory was 147.2 MB in the beginning and 110.3 MB in the end (delta: 36.9 MB). Peak memory consumption was 74.7 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, 29 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 5072.1ms, OverallIterations: 6, TraceHistogramMax: 3, EmptinessCheckTime: 12.5ms, AutomataDifference: 1602.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 123 SDtfs, 190 SDslu, 284 SDs, 0 SdLazy, 649 SolverSat, 78 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 501.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 243 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 1552.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=41occurred in iteration=4, InterpolantAutomatonStates: 52, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 48.7ms AutomataMinimizationTime, 6 MinimizatonAttempts, 31 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 74.1ms SsaConstructionTime, 205.2ms SatisfiabilityAnalysisTime, 1795.2ms InterpolantComputationTime, 316 NumberOfCodeBlocks, 293 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 305 ConstructedInterpolants, 0 QuantifiedInterpolants, 985 SizeOfPredicates, 11 NumberOfNonLiveVariables, 576 ConjunctsInSsa, 33 ConjunctsInUnsatCore, 11 InterpolantComputations, 4 PerfectInterpolantSequences, 84/112 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...