/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/nla-digbench/hard2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 19:19:30,883 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 19:19:30,885 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 19:19:30,917 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 19:19:30,918 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 19:19:30,919 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 19:19:30,920 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 19:19:30,942 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 19:19:30,944 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 19:19:30,948 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 19:19:30,949 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 19:19:30,951 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 19:19:30,951 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 19:19:30,956 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 19:19:30,957 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 19:19:30,959 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 19:19:30,962 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 19:19:30,963 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 19:19:30,966 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 19:19:30,971 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 19:19:30,973 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 19:19:30,974 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 19:19:30,977 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 19:19:30,979 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 19:19:30,983 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-05-02 19:19:30,983 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-05-02 19:19:30,983 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-05-02 19:19:30,989 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-05-02 19:19:30,989 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-05-02 19:19:30,990 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-05-02 19:19:30,990 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-02 19:19:30,991 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-02 19:19:30,992 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-02 19:19:30,993 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-02 19:19:30,994 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-02 19:19:30,994 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-02 19:19:30,995 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-02 19:19:30,995 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-02 19:19:30,995 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 19:19:30,996 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 19:19:30,996 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 19:19:31,000 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 19:19:31,017 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 19:19:31,018 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 19:19:31,020 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 19:19:31,020 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 19:19:31,021 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 19:19:31,021 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 19:19:31,021 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 19:19:31,021 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 19:19:31,021 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 19:19:31,021 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 19:19:31,022 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 19:19:31,022 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 19:19:31,022 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 19:19:31,022 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 19:19:31,023 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 19:19:31,023 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 19:19:31,023 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 19:19:31,023 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 19:19:31,023 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 19:19:31,023 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 19:19:31,024 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 19:19:31,025 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 19:19:31,025 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 19:19:31,364 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 19:19:31,389 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 19:19:31,391 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 19:19:31,392 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 19:19:31,393 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 19:19:31,394 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/hard2.c [2021-05-02 19:19:31,444 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca72f4f0c/c9bfae51bb8f4e488408b97a1665882e/FLAG7738ba51f [2021-05-02 19:19:31,863 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 19:19:31,864 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/hard2.c [2021-05-02 19:19:31,869 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca72f4f0c/c9bfae51bb8f4e488408b97a1665882e/FLAG7738ba51f [2021-05-02 19:19:31,886 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca72f4f0c/c9bfae51bb8f4e488408b97a1665882e [2021-05-02 19:19:31,891 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 19:19:31,893 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 19:19:31,897 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 19:19:31,897 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 19:19:31,900 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 19:19:31,901 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 07:19:31" (1/1) ... [2021-05-02 19:19:31,902 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c8edcf4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:19:31, skipping insertion in model container [2021-05-02 19:19:31,902 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 07:19:31" (1/1) ... [2021-05-02 19:19:31,909 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 19:19:31,924 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 19:19:32,061 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/hard2.c[526,539] [2021-05-02 19:19:32,081 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 19:19:32,089 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 19:19:32,101 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/hard2.c[526,539] [2021-05-02 19:19:32,117 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 19:19:32,130 INFO L208 MainTranslator]: Completed translation [2021-05-02 19:19:32,130 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:19:32 WrapperNode [2021-05-02 19:19:32,131 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 19:19:32,132 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 19:19:32,132 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 19:19:32,132 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 19:19:32,172 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:19:32" (1/1) ... [2021-05-02 19:19:32,172 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:19:32" (1/1) ... [2021-05-02 19:19:32,206 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:19:32" (1/1) ... [2021-05-02 19:19:32,206 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:19:32" (1/1) ... [2021-05-02 19:19:32,217 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:19:32" (1/1) ... [2021-05-02 19:19:32,224 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:19:32" (1/1) ... [2021-05-02 19:19:32,229 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:19:32" (1/1) ... [2021-05-02 19:19:32,232 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 19:19:32,233 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 19:19:32,233 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 19:19:32,233 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 19:19:32,234 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:19:32" (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 19:19:32,300 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 19:19:32,301 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 19:19:32,301 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 19:19:32,301 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 19:19:32,301 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 19:19:32,301 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 19:19:32,301 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 19:19:32,302 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 19:19:32,302 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 19:19:32,302 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 19:19:32,302 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 19:19:32,302 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 19:19:32,303 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 19:19:32,303 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 19:19:32,303 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 19:19:32,303 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 19:19:32,303 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 19:19:32,303 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 19:19:32,304 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 19:19:32,304 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 19:19:32,596 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 19:19:32,596 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 19:19:32,597 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:19:32 BoogieIcfgContainer [2021-05-02 19:19:32,597 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 19:19:32,598 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 19:19:32,598 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 19:19:32,598 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 19:19:32,617 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:19:32" (1/1) ... [2021-05-02 19:19:32,631 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 07:19:32 BasicIcfg [2021-05-02 19:19:32,631 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 19:19:32,645 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 19:19:32,645 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 19:19:32,647 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 19:19:32,648 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 07:19:31" (1/4) ... [2021-05-02 19:19:32,648 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@294fd7e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 07:19:32, skipping insertion in model container [2021-05-02 19:19:32,649 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:19:32" (2/4) ... [2021-05-02 19:19:32,649 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@294fd7e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 07:19:32, skipping insertion in model container [2021-05-02 19:19:32,649 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:19:32" (3/4) ... [2021-05-02 19:19:32,649 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@294fd7e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 07:19:32, skipping insertion in model container [2021-05-02 19:19:32,649 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 07:19:32" (4/4) ... [2021-05-02 19:19:32,650 INFO L111 eAbstractionObserver]: Analyzing ICFG hard2.cJordan [2021-05-02 19:19:32,655 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 19:19:32,658 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 19:19:32,697 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 19:19:32,721 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 19:19:32,721 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 19:19:32,721 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 19:19:32,721 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 19:19:32,722 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 19:19:32,722 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 19:19:32,722 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 19:19:32,722 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 19:19:32,737 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 15 states have (on average 1.6) internal successors, (24), 16 states have internal predecessors, (24), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 19:19:32,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 19:19:32,743 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:19:32,743 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:19:32,744 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:19:32,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:19:32,748 INFO L82 PathProgramCache]: Analyzing trace with hash -1059151250, now seen corresponding path program 1 times [2021-05-02 19:19:32,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:19:32,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927324066] [2021-05-02 19:19:32,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:19:32,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:19:33,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:19:33,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:19:33,058 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 19:19:33,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:19:33,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927324066] [2021-05-02 19:19:33,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927324066] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:19:33,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:19:33,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 19:19:33,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559949735] [2021-05-02 19:19:33,065 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 19:19:33,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:19:33,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 19:19:33,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 19:19:33,082 INFO L87 Difference]: Start difference. First operand has 29 states, 15 states have (on average 1.6) internal successors, (24), 16 states have internal predecessors, (24), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:19:33,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:19:33,429 INFO L93 Difference]: Finished difference Result 43 states and 56 transitions. [2021-05-02 19:19:33,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 19:19:33,431 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-02 19:19:33,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:19:33,438 INFO L225 Difference]: With dead ends: 43 [2021-05-02 19:19:33,438 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 19:19:33,439 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 205.7ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:19:33,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 19:19:33,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2021-05-02 19:19:33,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 19:19:33,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2021-05-02 19:19:33,477 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 11 [2021-05-02 19:19:33,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:19:33,478 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2021-05-02 19:19:33,478 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 19:19:33,478 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2021-05-02 19:19:33,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-02 19:19:33,480 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:19:33,480 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:19:33,480 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 19:19:33,480 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:19:33,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:19:33,481 INFO L82 PathProgramCache]: Analyzing trace with hash -2043934920, now seen corresponding path program 1 times [2021-05-02 19:19:33,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:19:33,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41726266] [2021-05-02 19:19:33,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:19:33,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:19:33,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:19:33,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:19:33,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-05-02 19:19:33,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:19:33,599 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 19:19:33,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:19:33,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41726266] [2021-05-02 19:19:33,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41726266] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:19:33,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:19:33,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 19:19:33,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028506552] [2021-05-02 19:19:33,601 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 19:19:33,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:19:33,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 19:19:33,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 19:19:33,602 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 19:19:33,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:19:33,824 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2021-05-02 19:19:33,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 19:19:33,825 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2021-05-02 19:19:33,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:19:33,827 INFO L225 Difference]: With dead ends: 39 [2021-05-02 19:19:33,827 INFO L226 Difference]: Without dead ends: 39 [2021-05-02 19:19:33,828 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 122.7ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:19:33,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-02 19:19:33,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2021-05-02 19:19:33,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 19:19:33,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2021-05-02 19:19:33,842 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 16 [2021-05-02 19:19:33,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:19:33,843 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2021-05-02 19:19:33,843 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 19:19:33,844 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2021-05-02 19:19:33,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-02 19:19:33,845 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:19:33,845 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:19:33,846 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 19:19:33,847 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:19:33,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:19:33,850 INFO L82 PathProgramCache]: Analyzing trace with hash 106953131, now seen corresponding path program 1 times [2021-05-02 19:19:33,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:19:33,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422023740] [2021-05-02 19:19:33,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:19:33,880 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:19:33,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1275461300] [2021-05-02 19:19:33,880 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 19:19:33,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:19:33,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 19:19:33,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:19:34,160 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 19:19:34,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:19:34,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422023740] [2021-05-02 19:19:34,161 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:19:34,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275461300] [2021-05-02 19:19:34,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275461300] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:19:34,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:19:34,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 19:19:34,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81570472] [2021-05-02 19:19:34,162 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 19:19:34,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:19:34,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 19:19:34,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-02 19:19:34,163 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 19:19:34,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:19:34,326 INFO L93 Difference]: Finished difference Result 51 states and 62 transitions. [2021-05-02 19:19:34,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 19:19:34,327 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 21 [2021-05-02 19:19:34,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:19:34,328 INFO L225 Difference]: With dead ends: 51 [2021-05-02 19:19:34,328 INFO L226 Difference]: Without dead ends: 50 [2021-05-02 19:19:34,330 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 63.4ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:19:34,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-02 19:19:34,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-05-02 19:19:34,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 30 states have internal predecessors, (33), 15 states have call successors, (15), 7 states have call predecessors, (15), 6 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 19:19:34,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2021-05-02 19:19:34,344 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 21 [2021-05-02 19:19:34,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:19:34,344 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2021-05-02 19:19:34,344 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 19:19:34,344 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2021-05-02 19:19:34,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 19:19:34,345 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:19:34,346 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:19:34,561 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-02 19:19:34,561 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:19:34,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:19:34,562 INFO L82 PathProgramCache]: Analyzing trace with hash 606156080, now seen corresponding path program 1 times [2021-05-02 19:19:34,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:19:34,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294674335] [2021-05-02 19:19:34,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:19:34,571 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:19:34,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1461639376] [2021-05-02 19:19:34,572 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 19:19:34,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:19:34,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 19:19:34,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:19:34,794 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-02 19:19:34,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:19:34,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294674335] [2021-05-02 19:19:34,794 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:19:34,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461639376] [2021-05-02 19:19:34,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461639376] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:19:34,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:19:34,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 19:19:34,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328507702] [2021-05-02 19:19:34,795 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 19:19:34,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:19:34,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 19:19:34,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-02 19:19:34,796 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 19:19:34,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:19:34,906 INFO L93 Difference]: Finished difference Result 61 states and 75 transitions. [2021-05-02 19:19:34,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 19:19:34,907 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2021-05-02 19:19:34,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:19:34,908 INFO L225 Difference]: With dead ends: 61 [2021-05-02 19:19:34,908 INFO L226 Difference]: Without dead ends: 56 [2021-05-02 19:19:34,909 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 50.1ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-02 19:19:34,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-02 19:19:34,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2021-05-02 19:19:34,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 32 states have (on average 1.1875) internal successors, (38), 34 states have internal predecessors, (38), 15 states have call successors, (15), 8 states have call predecessors, (15), 7 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 19:19:34,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 66 transitions. [2021-05-02 19:19:34,918 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 66 transitions. Word has length 28 [2021-05-02 19:19:34,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:19:34,918 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 66 transitions. [2021-05-02 19:19:34,918 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 19:19:34,919 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 66 transitions. [2021-05-02 19:19:34,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 19:19:34,919 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:19:34,920 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:19:35,140 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:19:35,141 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:19:35,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:19:35,142 INFO L82 PathProgramCache]: Analyzing trace with hash 312970699, now seen corresponding path program 1 times [2021-05-02 19:19:35,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:19:35,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266295326] [2021-05-02 19:19:35,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:19:35,150 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:19:35,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1974538910] [2021-05-02 19:19:35,150 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 19:19:35,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:19:35,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 19:19:35,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:19:35,358 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 19:19:35,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:19:35,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266295326] [2021-05-02 19:19:35,358 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:19:35,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974538910] [2021-05-02 19:19:35,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974538910] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:19:35,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:19:35,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 19:19:35,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303228319] [2021-05-02 19:19:35,359 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 19:19:35,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:19:35,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 19:19:35,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 19:19:35,360 INFO L87 Difference]: Start difference. First operand 55 states and 66 transitions. Second operand has 9 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2021-05-02 19:19:35,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:19:35,595 INFO L93 Difference]: Finished difference Result 79 states and 98 transitions. [2021-05-02 19:19:35,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 19:19:35,595 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 38 [2021-05-02 19:19:35,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:19:35,598 INFO L225 Difference]: With dead ends: 79 [2021-05-02 19:19:35,598 INFO L226 Difference]: Without dead ends: 73 [2021-05-02 19:19:35,598 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 64.7ms TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-02 19:19:35,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-05-02 19:19:35,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-05-02 19:19:35,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 45 states have internal predecessors, (50), 20 states have call successors, (20), 10 states have call predecessors, (20), 9 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-02 19:19:35,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 88 transitions. [2021-05-02 19:19:35,605 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 88 transitions. Word has length 38 [2021-05-02 19:19:35,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:19:35,605 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 88 transitions. [2021-05-02 19:19:35,606 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2021-05-02 19:19:35,606 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 88 transitions. [2021-05-02 19:19:35,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-02 19:19:35,607 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:19:35,607 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:19:35,822 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:19:35,823 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:19:35,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:19:35,823 INFO L82 PathProgramCache]: Analyzing trace with hash 641121707, now seen corresponding path program 2 times [2021-05-02 19:19:35,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:19:35,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140517649] [2021-05-02 19:19:35,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:19:35,829 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:19:35,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1834983013] [2021-05-02 19:19:35,829 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 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 19:19:35,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 19:19:35,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:19:35,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 19:19:35,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:19:36,092 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 33 proven. 17 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-05-02 19:19:36,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:19:36,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140517649] [2021-05-02 19:19:36,093 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:19:36,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834983013] [2021-05-02 19:19:36,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834983013] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:19:36,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:19:36,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 19:19:36,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606197851] [2021-05-02 19:19:36,095 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 19:19:36,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:19:36,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 19:19:36,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:19:36,096 INFO L87 Difference]: Start difference. First operand 73 states and 88 transitions. Second operand has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-02 19:19:36,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:19:36,363 INFO L93 Difference]: Finished difference Result 102 states and 128 transitions. [2021-05-02 19:19:36,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 19:19:36,364 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) Word has length 55 [2021-05-02 19:19:36,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:19:36,365 INFO L225 Difference]: With dead ends: 102 [2021-05-02 19:19:36,365 INFO L226 Difference]: Without dead ends: 96 [2021-05-02 19:19:36,366 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 74.8ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-02 19:19:36,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-05-02 19:19:36,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 94. [2021-05-02 19:19:36,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 55 states have (on average 1.1636363636363636) internal successors, (64), 58 states have internal predecessors, (64), 27 states have call successors, (27), 12 states have call predecessors, (27), 11 states have return successors, (25), 23 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-02 19:19:36,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 116 transitions. [2021-05-02 19:19:36,374 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 116 transitions. Word has length 55 [2021-05-02 19:19:36,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:19:36,374 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 116 transitions. [2021-05-02 19:19:36,374 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-02 19:19:36,374 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 116 transitions. [2021-05-02 19:19:36,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-02 19:19:36,386 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:19:36,387 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 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 19:19:36,604 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:19:36,605 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:19:36,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:19:36,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1500982750, now seen corresponding path program 1 times [2021-05-02 19:19:36,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:19:36,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330014283] [2021-05-02 19:19:36,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:19:36,611 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:19:36,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [811476028] [2021-05-02 19:19:36,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 19:19:36,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:19:36,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-02 19:19:36,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:19:36,841 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 24 proven. 20 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-05-02 19:19:36,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:19:36,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330014283] [2021-05-02 19:19:36,841 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:19:36,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811476028] [2021-05-02 19:19:36,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811476028] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:19:36,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:19:36,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 19:19:36,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605374748] [2021-05-02 19:19:36,842 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 19:19:36,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:19:36,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 19:19:36,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 19:19:36,843 INFO L87 Difference]: Start difference. First operand 94 states and 116 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-02 19:19:37,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:19:37,017 INFO L93 Difference]: Finished difference Result 115 states and 139 transitions. [2021-05-02 19:19:37,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 19:19:37,018 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 58 [2021-05-02 19:19:37,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:19:37,021 INFO L225 Difference]: With dead ends: 115 [2021-05-02 19:19:37,021 INFO L226 Difference]: Without dead ends: 115 [2021-05-02 19:19:37,022 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 70.4ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-02 19:19:37,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-05-02 19:19:37,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 113. [2021-05-02 19:19:37,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 69 states have (on average 1.1594202898550725) internal successors, (80), 71 states have internal predecessors, (80), 29 states have call successors, (29), 15 states have call predecessors, (29), 14 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) [2021-05-02 19:19:37,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 136 transitions. [2021-05-02 19:19:37,041 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 136 transitions. Word has length 58 [2021-05-02 19:19:37,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:19:37,041 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 136 transitions. [2021-05-02 19:19:37,041 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-02 19:19:37,042 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 136 transitions. [2021-05-02 19:19:37,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-05-02 19:19:37,043 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:19:37,043 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:19:37,243 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-02 19:19:37,244 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:19:37,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:19:37,244 INFO L82 PathProgramCache]: Analyzing trace with hash 2105329000, now seen corresponding path program 2 times [2021-05-02 19:19:37,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:19:37,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814174401] [2021-05-02 19:19:37,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:19:37,252 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:19:37,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [260589706] [2021-05-02 19:19:37,253 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:19:37,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 19:19:37,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:19:37,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 19:19:37,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:19:37,529 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 26 proven. 24 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-05-02 19:19:37,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:19:37,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814174401] [2021-05-02 19:19:37,529 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:19:37,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260589706] [2021-05-02 19:19:37,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260589706] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:19:37,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:19:37,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 19:19:37,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527851833] [2021-05-02 19:19:37,532 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 19:19:37,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:19:37,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 19:19:37,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:19:37,533 INFO L87 Difference]: Start difference. First operand 113 states and 136 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2021-05-02 19:19:37,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:19:37,723 INFO L93 Difference]: Finished difference Result 118 states and 139 transitions. [2021-05-02 19:19:37,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 19:19:37,727 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) Word has length 63 [2021-05-02 19:19:37,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:19:37,728 INFO L225 Difference]: With dead ends: 118 [2021-05-02 19:19:37,728 INFO L226 Difference]: Without dead ends: 117 [2021-05-02 19:19:37,728 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 82.4ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-02 19:19:37,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-05-02 19:19:37,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2021-05-02 19:19:37,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 71 states have (on average 1.1267605633802817) internal successors, (80), 74 states have internal predecessors, (80), 30 states have call successors, (30), 16 states have call predecessors, (30), 15 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) [2021-05-02 19:19:37,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 137 transitions. [2021-05-02 19:19:37,735 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 137 transitions. Word has length 63 [2021-05-02 19:19:37,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:19:37,736 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 137 transitions. [2021-05-02 19:19:37,736 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2021-05-02 19:19:37,736 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 137 transitions. [2021-05-02 19:19:37,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-02 19:19:37,737 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:19:37,737 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:19:37,952 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:19:37,953 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:19:37,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:19:37,953 INFO L82 PathProgramCache]: Analyzing trace with hash -781577916, now seen corresponding path program 1 times [2021-05-02 19:19:37,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:19:37,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226273586] [2021-05-02 19:19:37,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:19:37,972 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:19:37,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [131603736] [2021-05-02 19:19:37,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:19:38,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:19:38,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 19:19:38,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:19:38,267 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 28 proven. 28 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-05-02 19:19:38,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:19:38,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226273586] [2021-05-02 19:19:38,267 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:19:38,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131603736] [2021-05-02 19:19:38,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131603736] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:19:38,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:19:38,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 19:19:38,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574276324] [2021-05-02 19:19:38,268 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 19:19:38,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:19:38,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 19:19:38,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:19:38,271 INFO L87 Difference]: Start difference. First operand 117 states and 137 transitions. Second operand has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 19:19:38,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:19:38,432 INFO L93 Difference]: Finished difference Result 121 states and 140 transitions. [2021-05-02 19:19:38,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 19:19:38,433 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 69 [2021-05-02 19:19:38,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:19:38,434 INFO L225 Difference]: With dead ends: 121 [2021-05-02 19:19:38,434 INFO L226 Difference]: Without dead ends: 95 [2021-05-02 19:19:38,434 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 72.6ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-02 19:19:38,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-05-02 19:19:38,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2021-05-02 19:19:38,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 57 states have (on average 1.1403508771929824) internal successors, (65), 59 states have internal predecessors, (65), 25 states have call successors, (25), 13 states have call predecessors, (25), 12 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2021-05-02 19:19:38,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 113 transitions. [2021-05-02 19:19:38,440 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 113 transitions. Word has length 69 [2021-05-02 19:19:38,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:19:38,440 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 113 transitions. [2021-05-02 19:19:38,440 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 19:19:38,440 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 113 transitions. [2021-05-02 19:19:38,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-05-02 19:19:38,442 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:19:38,442 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:19:38,656 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:19:38,657 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:19:38,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:19:38,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1968092725, now seen corresponding path program 3 times [2021-05-02 19:19:38,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:19:38,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734582297] [2021-05-02 19:19:38,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:19:38,664 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:19:38,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1545792640] [2021-05-02 19:19:38,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:19:38,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 19:19:38,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:19:38,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 19:19:38,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:19:38,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:19:38,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:19:38,958 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 90 proven. 8 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2021-05-02 19:19:38,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:19:38,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734582297] [2021-05-02 19:19:38,959 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:19:38,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545792640] [2021-05-02 19:19:38,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545792640] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:19:38,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:19:38,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 19:19:38,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851953425] [2021-05-02 19:19:38,959 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 19:19:38,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:19:38,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 19:19:38,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-02 19:19:38,960 INFO L87 Difference]: Start difference. First operand 95 states and 113 transitions. Second operand has 11 states, 10 states have (on average 1.8) internal successors, (18), 8 states have internal predecessors, (18), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 19:19:39,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:19:39,207 INFO L93 Difference]: Finished difference Result 109 states and 131 transitions. [2021-05-02 19:19:39,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 19:19:39,208 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.8) internal successors, (18), 8 states have internal predecessors, (18), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) Word has length 72 [2021-05-02 19:19:39,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:19:39,209 INFO L225 Difference]: With dead ends: 109 [2021-05-02 19:19:39,209 INFO L226 Difference]: Without dead ends: 109 [2021-05-02 19:19:39,210 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 94.8ms TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-05-02 19:19:39,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-05-02 19:19:39,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 108. [2021-05-02 19:19:39,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 65 states have (on average 1.1384615384615384) internal successors, (74), 67 states have internal predecessors, (74), 29 states have call successors, (29), 14 states have call predecessors, (29), 13 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) [2021-05-02 19:19:39,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 130 transitions. [2021-05-02 19:19:39,215 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 130 transitions. Word has length 72 [2021-05-02 19:19:39,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:19:39,216 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 130 transitions. [2021-05-02 19:19:39,216 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 1.8) internal successors, (18), 8 states have internal predecessors, (18), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 19:19:39,216 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 130 transitions. [2021-05-02 19:19:39,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-02 19:19:39,217 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:19:39,217 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:19:39,432 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-02 19:19:39,433 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:19:39,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:19:39,433 INFO L82 PathProgramCache]: Analyzing trace with hash 711962046, now seen corresponding path program 3 times [2021-05-02 19:19:39,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:19:39,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151172360] [2021-05-02 19:19:39,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:19:39,443 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:19:39,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [301294526] [2021-05-02 19:19:39,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:19:39,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 19:19:39,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:19:39,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-02 19:19:39,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:19:39,733 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 39 proven. 30 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-05-02 19:19:39,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:19:39,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151172360] [2021-05-02 19:19:39,734 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:19:39,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301294526] [2021-05-02 19:19:39,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301294526] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:19:39,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:19:39,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 19:19:39,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230366626] [2021-05-02 19:19:39,736 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 19:19:39,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:19:39,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 19:19:39,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:19:39,737 INFO L87 Difference]: Start difference. First operand 108 states and 130 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-02 19:19:39,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:19:39,964 INFO L93 Difference]: Finished difference Result 127 states and 151 transitions. [2021-05-02 19:19:39,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 19:19:39,965 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 75 [2021-05-02 19:19:39,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:19:39,966 INFO L225 Difference]: With dead ends: 127 [2021-05-02 19:19:39,966 INFO L226 Difference]: Without dead ends: 127 [2021-05-02 19:19:39,966 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 85.2ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-02 19:19:39,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-05-02 19:19:39,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 125. [2021-05-02 19:19:39,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 77 states have (on average 1.1428571428571428) internal successors, (88), 79 states have internal predecessors, (88), 31 states have call successors, (31), 17 states have call predecessors, (31), 16 states have return successors, (29), 28 states have call predecessors, (29), 29 states have call successors, (29) [2021-05-02 19:19:39,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 148 transitions. [2021-05-02 19:19:39,979 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 148 transitions. Word has length 75 [2021-05-02 19:19:39,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:19:39,980 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 148 transitions. [2021-05-02 19:19:39,980 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-02 19:19:39,980 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 148 transitions. [2021-05-02 19:19:39,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-02 19:19:39,982 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:19:39,982 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:19:40,205 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:19:40,206 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:19:40,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:19:40,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1120325240, now seen corresponding path program 4 times [2021-05-02 19:19:40,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:19:40,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511897217] [2021-05-02 19:19:40,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:19:40,219 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:19:40,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1497479822] [2021-05-02 19:19:40,220 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:19:40,279 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 19:19:40,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:19:40,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 48 conjunts are in the unsatisfiable core [2021-05-02 19:19:40,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:19:54,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:19:54,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:19:54,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:19:54,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:19:54,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:19:54,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:03,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:03,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:03,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:03,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:03,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:03,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:10,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:10,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:10,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:24,985 WARN L205 SmtUtils]: Spent 6.04 s on a formula simplification that was a NOOP. DAG size: 24 [2021-05-02 19:20:25,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:20:25,078 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 50 proven. 61 refuted. 7 times theorem prover too weak. 188 trivial. 0 not checked. [2021-05-02 19:20:25,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:20:25,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511897217] [2021-05-02 19:20:25,079 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:20:25,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497479822] [2021-05-02 19:20:25,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497479822] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:20:25,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:20:25,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 19:20:25,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592804064] [2021-05-02 19:20:25,079 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 19:20:25,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:20:25,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 19:20:25,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=106, Unknown=17, NotChecked=0, Total=156 [2021-05-02 19:20:25,081 INFO L87 Difference]: Start difference. First operand 125 states and 148 transitions. Second operand has 13 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 8 states have call successors, (15), 1 states have call predecessors, (15), 2 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2021-05-02 19:20:52,074 WARN L205 SmtUtils]: Spent 4.04 s on a formula simplification that was a NOOP. DAG size: 19 [2021-05-02 19:21:14,293 WARN L205 SmtUtils]: Spent 6.07 s on a formula simplification that was a NOOP. DAG size: 26 [2021-05-02 19:21:36,432 WARN L205 SmtUtils]: Spent 6.14 s on a formula simplification that was a NOOP. DAG size: 28 [2021-05-02 19:21:56,654 WARN L205 SmtUtils]: Spent 20.20 s on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-05-02 19:22:13,061 WARN L205 SmtUtils]: Spent 12.13 s on a formula simplification. DAG size of input: 32 DAG size of output: 31 [2021-05-02 19:22:25,768 WARN L205 SmtUtils]: Spent 12.13 s on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2021-05-02 19:22:30,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:22:30,773 INFO L93 Difference]: Finished difference Result 133 states and 155 transitions. [2021-05-02 19:22:30,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 19:22:30,774 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 8 states have call successors, (15), 1 states have call predecessors, (15), 2 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) Word has length 80 [2021-05-02 19:22:30,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:22:30,774 INFO L225 Difference]: With dead ends: 133 [2021-05-02 19:22:30,774 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 19:22:30,775 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 132222.1ms TimeCoverageRelationStatistics Valid=85, Invalid=265, Unknown=30, NotChecked=0, Total=380 [2021-05-02 19:22:30,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 19:22:30,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 19:22:30,775 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 19:22:30,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 19:22:30,775 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 80 [2021-05-02 19:22:30,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:22:30,775 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 19:22:30,775 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 8 states have call successors, (15), 1 states have call predecessors, (15), 2 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2021-05-02 19:22:30,776 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 19:22:30,776 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 19:22:30,980 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:22:30,988 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 07:22:30 BasicIcfg [2021-05-02 19:22:30,988 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 19:22:30,989 INFO L168 Benchmark]: Toolchain (without parser) took 179096.05 ms. Allocated memory was 210.8 MB in the beginning and 348.1 MB in the end (delta: 137.4 MB). Free memory was 175.5 MB in the beginning and 292.6 MB in the end (delta: -117.1 MB). Peak memory consumption was 21.3 MB. Max. memory is 8.0 GB. [2021-05-02 19:22:30,989 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 210.8 MB. Free memory is still 192.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 19:22:30,989 INFO L168 Benchmark]: CACSL2BoogieTranslator took 233.79 ms. Allocated memory is still 210.8 MB. Free memory was 175.2 MB in the beginning and 165.5 MB in the end (delta: 9.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-05-02 19:22:30,989 INFO L168 Benchmark]: Boogie Preprocessor took 100.18 ms. Allocated memory is still 210.8 MB. Free memory was 165.4 MB in the beginning and 193.5 MB in the end (delta: -28.1 MB). Peak memory consumption was 3.4 MB. Max. memory is 8.0 GB. [2021-05-02 19:22:30,989 INFO L168 Benchmark]: RCFGBuilder took 364.22 ms. Allocated memory is still 210.8 MB. Free memory was 193.5 MB in the beginning and 178.1 MB in the end (delta: 15.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-02 19:22:30,989 INFO L168 Benchmark]: IcfgTransformer took 33.77 ms. Allocated memory is still 210.8 MB. Free memory was 178.1 MB in the beginning and 176.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 19:22:30,989 INFO L168 Benchmark]: TraceAbstraction took 178343.44 ms. Allocated memory was 210.8 MB in the beginning and 348.1 MB in the end (delta: 137.4 MB). Free memory was 176.3 MB in the beginning and 292.6 MB in the end (delta: -116.2 MB). Peak memory consumption was 22.1 MB. Max. memory is 8.0 GB. [2021-05-02 19:22:30,990 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 210.8 MB. Free memory is still 192.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 233.79 ms. Allocated memory is still 210.8 MB. Free memory was 175.2 MB in the beginning and 165.5 MB in the end (delta: 9.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 100.18 ms. Allocated memory is still 210.8 MB. Free memory was 165.4 MB in the beginning and 193.5 MB in the end (delta: -28.1 MB). Peak memory consumption was 3.4 MB. Max. memory is 8.0 GB. * RCFGBuilder took 364.22 ms. Allocated memory is still 210.8 MB. Free memory was 193.5 MB in the beginning and 178.1 MB in the end (delta: 15.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 33.77 ms. Allocated memory is still 210.8 MB. Free memory was 178.1 MB in the beginning and 176.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 178343.44 ms. Allocated memory was 210.8 MB in the beginning and 348.1 MB in the end (delta: 137.4 MB). Free memory was 176.3 MB in the beginning and 292.6 MB in the end (delta: -116.2 MB). Peak memory consumption was 22.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 17]: 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: 178262.5ms, OverallIterations: 12, TraceHistogramMax: 13, EmptinessCheckTime: 34.0ms, AutomataDifference: 128105.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 9.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 317 SDtfs, 238 SDslu, 1366 SDs, 0 SdLazy, 2315 SolverSat, 229 SolverUnsat, 15 SolverUnknown, 0 SolverNotchecked, 38740.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 599 GetRequests, 481 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 133209.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=125occurred in iteration=11, InterpolantAutomatonStates: 107, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 126.6ms AutomataMinimizationTime, 12 MinimizatonAttempts, 22 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 102.4ms SsaConstructionTime, 303.1ms SatisfiabilityAnalysisTime, 46888.1ms InterpolantComputationTime, 586 NumberOfCodeBlocks, 520 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 574 ConstructedInterpolants, 0 QuantifiedInterpolants, 3156 SizeOfPredicates, 48 NumberOfNonLiveVariables, 1669 ConjunctsInSsa, 312 ConjunctsInUnsatCore, 12 InterpolantComputations, 2 PerfectInterpolantSequences, 1357/1571 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! [MP z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process Received shutdown request...