/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-scaling/egcd3-ll_valuebound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7390193 [2022-04-05 02:31:19,820 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-05 02:31:19,822 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-05 02:31:19,848 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-04-05 02:31:19,848 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-04-05 02:31:19,849 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-04-05 02:31:19,850 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-04-05 02:31:19,852 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-04-05 02:31:19,854 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-04-05 02:31:19,855 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-04-05 02:31:19,855 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-04-05 02:31:19,857 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-04-05 02:31:19,857 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-05 02:31:19,858 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-05 02:31:19,859 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-05 02:31:19,870 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-05 02:31:19,871 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-05 02:31:19,872 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-05 02:31:19,873 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-05 02:31:19,874 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-05 02:31:19,876 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-05 02:31:19,882 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-05 02:31:19,883 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-05 02:31:19,884 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-05 02:31:19,885 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-05 02:31:19,887 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-04-05 02:31:19,887 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-04-05 02:31:19,887 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-04-05 02:31:19,888 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-04-05 02:31:19,889 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-04-05 02:31:19,889 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-04-05 02:31:19,890 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-04-05 02:31:19,890 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-04-05 02:31:19,891 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-04-05 02:31:19,891 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-04-05 02:31:19,892 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-04-05 02:31:19,892 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-04-05 02:31:19,893 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-04-05 02:31:19,893 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-04-05 02:31:19,893 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-05 02:31:19,894 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-05 02:31:19,895 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-05 02:31:19,896 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-04-05 02:31:19,904 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-05 02:31:19,904 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-05 02:31:19,905 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-05 02:31:19,905 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-05 02:31:19,905 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-05 02:31:19,905 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-05 02:31:19,906 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-05 02:31:19,906 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-05 02:31:19,906 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-05 02:31:19,906 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-05 02:31:19,906 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-05 02:31:19,906 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-05 02:31:19,907 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-05 02:31:19,907 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-05 02:31:19,907 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-05 02:31:19,907 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-05 02:31:19,907 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-05 02:31:19,907 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-05 02:31:19,907 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 02:31:19,908 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-05 02:31:19,908 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-05 02:31:19,908 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-05 02:31:19,908 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-05 02:31:20,120 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-05 02:31:20,147 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-05 02:31:20,149 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-05 02:31:20,150 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-05 02:31:20,151 INFO L275 PluginConnector]: CDTParser initialized [2022-04-05 02:31:20,152 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound1.c [2022-04-05 02:31:20,227 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/562adf4b3/625e27fc6ccf4317ac02bf320f9e64b3/FLAGfbd6daed3 [2022-04-05 02:31:20,614 INFO L306 CDTParser]: Found 1 translation units. [2022-04-05 02:31:20,614 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound1.c [2022-04-05 02:31:20,622 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/562adf4b3/625e27fc6ccf4317ac02bf320f9e64b3/FLAGfbd6daed3 [2022-04-05 02:31:20,636 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/562adf4b3/625e27fc6ccf4317ac02bf320f9e64b3 [2022-04-05 02:31:20,638 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-05 02:31:20,640 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-05 02:31:20,641 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-05 02:31:20,641 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-05 02:31:20,645 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-05 02:31:20,645 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 02:31:20" (1/1) ... [2022-04-05 02:31:20,646 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21e79041 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 02:31:20, skipping insertion in model container [2022-04-05 02:31:20,646 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 02:31:20" (1/1) ... [2022-04-05 02:31:20,652 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-05 02:31:20,666 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-05 02:31:20,812 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound1.c[490,503] [2022-04-05 02:31:20,835 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 02:31:20,843 INFO L203 MainTranslator]: Completed pre-run [2022-04-05 02:31:20,851 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound1.c[490,503] [2022-04-05 02:31:20,859 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 02:31:20,870 INFO L208 MainTranslator]: Completed translation [2022-04-05 02:31:20,870 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 02:31:20 WrapperNode [2022-04-05 02:31:20,871 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-05 02:31:20,872 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-05 02:31:20,872 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-05 02:31:20,872 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-05 02:31:20,880 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 02:31:20" (1/1) ... [2022-04-05 02:31:20,881 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 02:31:20" (1/1) ... [2022-04-05 02:31:20,886 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 02:31:20" (1/1) ... [2022-04-05 02:31:20,886 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 02:31:20" (1/1) ... [2022-04-05 02:31:20,890 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 02:31:20" (1/1) ... [2022-04-05 02:31:20,894 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 02:31:20" (1/1) ... [2022-04-05 02:31:20,895 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 02:31:20" (1/1) ... [2022-04-05 02:31:20,897 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-05 02:31:20,898 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-05 02:31:20,898 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-05 02:31:20,898 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-05 02:31:20,908 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 02:31:20" (1/1) ... [2022-04-05 02:31:20,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 02:31:20,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:31:20,940 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-05 02:31:20,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-05 02:31:20,986 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-05 02:31:20,986 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-05 02:31:20,986 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-05 02:31:20,986 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-05 02:31:20,987 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-05 02:31:20,987 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-05 02:31:20,987 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-05 02:31:20,987 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-05 02:31:20,988 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-05 02:31:20,988 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-05 02:31:20,988 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-05 02:31:20,988 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-05 02:31:20,988 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-05 02:31:20,989 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-05 02:31:20,989 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-05 02:31:20,991 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-05 02:31:20,991 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-05 02:31:20,991 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-05 02:31:20,991 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-05 02:31:20,992 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-05 02:31:21,055 INFO L234 CfgBuilder]: Building ICFG [2022-04-05 02:31:21,057 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-05 02:31:21,197 INFO L275 CfgBuilder]: Performing block encoding [2022-04-05 02:31:21,203 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-05 02:31:21,204 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-04-05 02:31:21,206 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 02:31:21 BoogieIcfgContainer [2022-04-05 02:31:21,206 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-05 02:31:21,207 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-05 02:31:21,207 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-05 02:31:21,208 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-05 02:31:21,211 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 02:31:21" (1/1) ... [2022-04-05 02:31:21,213 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_JORDAN [2022-04-05 02:31:21,230 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 02:31:21 BasicIcfg [2022-04-05 02:31:21,231 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-05 02:31:21,237 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-05 02:31:21,237 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-05 02:31:21,239 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-05 02:31:21,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.04 02:31:20" (1/4) ... [2022-04-05 02:31:21,240 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c1ae932 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 02:31:21, skipping insertion in model container [2022-04-05 02:31:21,241 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 02:31:20" (2/4) ... [2022-04-05 02:31:21,241 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c1ae932 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 02:31:21, skipping insertion in model container [2022-04-05 02:31:21,241 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 02:31:21" (3/4) ... [2022-04-05 02:31:21,241 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c1ae932 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.04 02:31:21, skipping insertion in model container [2022-04-05 02:31:21,241 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 02:31:21" (4/4) ... [2022-04-05 02:31:21,242 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound1.cJordan [2022-04-05 02:31:21,247 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-04-05 02:31:21,248 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-05 02:31:21,333 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-05 02:31:21,342 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-05 02:31:21,342 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-05 02:31:21,363 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-05 02:31:21,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-05 02:31:21,372 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:31:21,373 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 02:31:21,373 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:31:21,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:31:21,380 INFO L85 PathProgramCache]: Analyzing trace with hash 958536290, now seen corresponding path program 1 times [2022-04-05 02:31:21,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:31:21,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382710250] [2022-04-05 02:31:21,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:31:21,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:31:21,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:31:21,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 02:31:21,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:31:21,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-05 02:31:21,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:31:21,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-05 02:31:21,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:31:21,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-05 02:31:21,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:31:21,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-04-05 02:31:21,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:31:21,639 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-05 02:31:21,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:31:21,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382710250] [2022-04-05 02:31:21,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382710250] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 02:31:21,643 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 02:31:21,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-05 02:31:21,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881986370] [2022-04-05 02:31:21,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 02:31:21,653 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-05 02:31:21,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:31:21,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-05 02:31:21,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-05 02:31:21,690 INFO L87 Difference]: Start difference. First operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-05 02:31:21,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:31:21,788 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2022-04-05 02:31:21,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-05 02:31:21,797 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-04-05 02:31:21,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:31:21,806 INFO L225 Difference]: With dead ends: 40 [2022-04-05 02:31:21,807 INFO L226 Difference]: Without dead ends: 35 [2022-04-05 02:31:21,809 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-05 02:31:21,812 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 24 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 02:31:21,813 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 43 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 02:31:21,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-04-05 02:31:21,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-04-05 02:31:21,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-05 02:31:21,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2022-04-05 02:31:21,855 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 33 [2022-04-05 02:31:21,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:31:21,856 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2022-04-05 02:31:21,856 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-05 02:31:21,857 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2022-04-05 02:31:21,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-04-05 02:31:21,859 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:31:21,860 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 02:31:21,860 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-05 02:31:21,860 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:31:21,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:31:21,863 INFO L85 PathProgramCache]: Analyzing trace with hash 641145651, now seen corresponding path program 1 times [2022-04-05 02:31:21,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:31:21,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201150022] [2022-04-05 02:31:21,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:31:21,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:31:21,898 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:31:21,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [24600284] [2022-04-05 02:31:21,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:31:21,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:31:21,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:31:21,900 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 02:31:21,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-05 02:31:21,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:31:21,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-05 02:31:21,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:31:22,125 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-05 02:31:22,126 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 02:31:22,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:31:22,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201150022] [2022-04-05 02:31:22,127 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:31:22,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24600284] [2022-04-05 02:31:22,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24600284] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 02:31:22,130 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 02:31:22,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-05 02:31:22,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758577792] [2022-04-05 02:31:22,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 02:31:22,133 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-05 02:31:22,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:31:22,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-05 02:31:22,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-05 02:31:22,136 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-05 02:31:22,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:31:22,247 INFO L93 Difference]: Finished difference Result 47 states and 62 transitions. [2022-04-05 02:31:22,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-05 02:31:22,252 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 34 [2022-04-05 02:31:22,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:31:22,253 INFO L225 Difference]: With dead ends: 47 [2022-04-05 02:31:22,253 INFO L226 Difference]: Without dead ends: 47 [2022-04-05 02:31:22,254 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-04-05 02:31:22,255 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 31 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 02:31:22,255 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 133 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 02:31:22,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-04-05 02:31:22,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 37. [2022-04-05 02:31:22,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-05 02:31:22,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2022-04-05 02:31:22,263 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 34 [2022-04-05 02:31:22,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:31:22,263 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2022-04-05 02:31:22,263 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-05 02:31:22,263 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2022-04-05 02:31:22,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-04-05 02:31:22,264 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:31:22,264 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 02:31:22,290 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-05 02:31:22,487 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:31:22,487 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:31:22,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:31:22,488 INFO L85 PathProgramCache]: Analyzing trace with hash 283168444, now seen corresponding path program 1 times [2022-04-05 02:31:22,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:31:22,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607162258] [2022-04-05 02:31:22,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:31:22,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:31:22,508 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:31:22,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1291120178] [2022-04-05 02:31:22,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:31:22,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:31:22,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:31:22,510 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 02:31:22,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-05 02:31:22,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:31:22,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 23 conjunts are in the unsatisfiable core [2022-04-05 02:31:22,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:31:22,914 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-05 02:31:22,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 02:31:23,128 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-05 02:31:23,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:31:23,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607162258] [2022-04-05 02:31:23,131 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:31:23,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291120178] [2022-04-05 02:31:23,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291120178] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-05 02:31:23,131 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-05 02:31:23,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 14 [2022-04-05 02:31:23,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779174387] [2022-04-05 02:31:23,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 02:31:23,132 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-05 02:31:23,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:31:23,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-05 02:31:23,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2022-04-05 02:31:23,134 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-05 02:31:23,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:31:23,231 INFO L93 Difference]: Finished difference Result 51 states and 65 transitions. [2022-04-05 02:31:23,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-05 02:31:23,231 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 37 [2022-04-05 02:31:23,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:31:23,235 INFO L225 Difference]: With dead ends: 51 [2022-04-05 02:31:23,235 INFO L226 Difference]: Without dead ends: 51 [2022-04-05 02:31:23,236 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-04-05 02:31:23,238 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 27 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 02:31:23,239 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 167 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 02:31:23,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-04-05 02:31:23,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2022-04-05 02:31:23,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 30 states have (on average 1.2) internal successors, (36), 31 states have internal predecessors, (36), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-05 02:31:23,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2022-04-05 02:31:23,257 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 37 [2022-04-05 02:31:23,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:31:23,257 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2022-04-05 02:31:23,257 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-05 02:31:23,257 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2022-04-05 02:31:23,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-04-05 02:31:23,258 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:31:23,258 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 02:31:23,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-05 02:31:23,478 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-04-05 02:31:23,478 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:31:23,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:31:23,479 INFO L85 PathProgramCache]: Analyzing trace with hash 656144812, now seen corresponding path program 1 times [2022-04-05 02:31:23,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:31:23,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696236586] [2022-04-05 02:31:23,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:31:23,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:31:23,495 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:31:23,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1983307916] [2022-04-05 02:31:23,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:31:23,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:31:23,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:31:23,498 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 02:31:23,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-05 02:31:23,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:31:23,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-05 02:31:23,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:31:23,684 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-05 02:31:23,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 02:31:23,780 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-05 02:31:23,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:31:23,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696236586] [2022-04-05 02:31:23,780 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:31:23,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983307916] [2022-04-05 02:31:23,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983307916] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 02:31:23,781 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 02:31:23,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-04-05 02:31:23,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655231193] [2022-04-05 02:31:23,781 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 02:31:23,781 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-05 02:31:23,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:31:23,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-05 02:31:23,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-04-05 02:31:23,782 INFO L87 Difference]: Start difference. First operand 50 states and 64 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-05 02:31:24,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:31:24,056 INFO L93 Difference]: Finished difference Result 96 states and 136 transitions. [2022-04-05 02:31:24,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-05 02:31:24,057 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2022-04-05 02:31:24,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:31:24,058 INFO L225 Difference]: With dead ends: 96 [2022-04-05 02:31:24,058 INFO L226 Difference]: Without dead ends: 96 [2022-04-05 02:31:24,058 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-04-05 02:31:24,059 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 60 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 02:31:24,060 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 238 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 02:31:24,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-04-05 02:31:24,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2022-04-05 02:31:24,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 47 states have (on average 1.2553191489361701) internal successors, (59), 48 states have internal predecessors, (59), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-04-05 02:31:24,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 95 transitions. [2022-04-05 02:31:24,069 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 95 transitions. Word has length 39 [2022-04-05 02:31:24,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:31:24,070 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 95 transitions. [2022-04-05 02:31:24,070 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-05 02:31:24,070 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 95 transitions. [2022-04-05 02:31:24,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-05 02:31:24,071 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:31:24,071 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 02:31:24,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-05 02:31:24,287 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:31:24,288 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:31:24,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:31:24,288 INFO L85 PathProgramCache]: Analyzing trace with hash -2079765955, now seen corresponding path program 1 times [2022-04-05 02:31:24,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:31:24,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841335113] [2022-04-05 02:31:24,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:31:24,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:31:24,300 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:31:24,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1916471209] [2022-04-05 02:31:24,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:31:24,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:31:24,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:31:24,302 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 02:31:24,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-05 02:31:24,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:31:24,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-05 02:31:24,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:31:24,586 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-05 02:31:24,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 02:31:24,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:31:24,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841335113] [2022-04-05 02:31:24,653 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:31:24,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916471209] [2022-04-05 02:31:24,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916471209] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 02:31:24,653 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-05 02:31:24,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-04-05 02:31:24,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539103020] [2022-04-05 02:31:24,654 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-05 02:31:24,654 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-05 02:31:24,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:31:24,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-05 02:31:24,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-04-05 02:31:24,655 INFO L87 Difference]: Start difference. First operand 71 states and 95 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-04-05 02:31:24,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:31:24,800 INFO L93 Difference]: Finished difference Result 77 states and 100 transitions. [2022-04-05 02:31:24,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-05 02:31:24,800 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 42 [2022-04-05 02:31:24,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:31:24,801 INFO L225 Difference]: With dead ends: 77 [2022-04-05 02:31:24,801 INFO L226 Difference]: Without dead ends: 77 [2022-04-05 02:31:24,801 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-04-05 02:31:24,802 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 28 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 02:31:24,802 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 207 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 02:31:24,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-04-05 02:31:24,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2022-04-05 02:31:24,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 50 states have (on average 1.24) internal successors, (62), 51 states have internal predecessors, (62), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-04-05 02:31:24,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 98 transitions. [2022-04-05 02:31:24,809 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 98 transitions. Word has length 42 [2022-04-05 02:31:24,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:31:24,809 INFO L478 AbstractCegarLoop]: Abstraction has 75 states and 98 transitions. [2022-04-05 02:31:24,809 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-04-05 02:31:24,809 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 98 transitions. [2022-04-05 02:31:24,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-05 02:31:24,810 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:31:24,810 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 02:31:24,834 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-05 02:31:25,024 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:31:25,024 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:31:25,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:31:25,025 INFO L85 PathProgramCache]: Analyzing trace with hash 446575011, now seen corresponding path program 1 times [2022-04-05 02:31:25,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:31:25,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543705030] [2022-04-05 02:31:25,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:31:25,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:31:25,036 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:31:25,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [706544298] [2022-04-05 02:31:25,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:31:25,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:31:25,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:31:25,040 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 02:31:25,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-05 02:31:25,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:31:25,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 17 conjunts are in the unsatisfiable core [2022-04-05 02:31:25,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:31:25,210 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-05 02:31:25,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 02:31:25,465 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-05 02:31:25,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:31:25,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543705030] [2022-04-05 02:31:25,466 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:31:25,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706544298] [2022-04-05 02:31:25,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706544298] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 02:31:25,466 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 02:31:25,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2022-04-05 02:31:25,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766314268] [2022-04-05 02:31:25,467 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 02:31:25,469 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-05 02:31:25,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:31:25,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-05 02:31:25,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2022-04-05 02:31:25,470 INFO L87 Difference]: Start difference. First operand 75 states and 98 transitions. Second operand has 15 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 11 states have internal predecessors, (34), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-04-05 02:31:25,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:31:25,716 INFO L93 Difference]: Finished difference Result 64 states and 82 transitions. [2022-04-05 02:31:25,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-05 02:31:25,717 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 11 states have internal predecessors, (34), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 42 [2022-04-05 02:31:25,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:31:25,718 INFO L225 Difference]: With dead ends: 64 [2022-04-05 02:31:25,718 INFO L226 Difference]: Without dead ends: 64 [2022-04-05 02:31:25,718 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2022-04-05 02:31:25,719 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 88 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 02:31:25,719 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 183 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 02:31:25,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-04-05 02:31:25,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 56. [2022-04-05 02:31:25,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 36 states have internal predecessors, (41), 15 states have call successors, (15), 6 states have call predecessors, (15), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-05 02:31:25,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 69 transitions. [2022-04-05 02:31:25,724 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 69 transitions. Word has length 42 [2022-04-05 02:31:25,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:31:25,725 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 69 transitions. [2022-04-05 02:31:25,725 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 11 states have internal predecessors, (34), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-04-05 02:31:25,725 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 69 transitions. [2022-04-05 02:31:25,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-05 02:31:25,726 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:31:25,726 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 02:31:25,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-05 02:31:25,939 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:31:25,940 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:31:25,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:31:25,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1977261252, now seen corresponding path program 1 times [2022-04-05 02:31:25,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:31:25,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637034225] [2022-04-05 02:31:25,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:31:25,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:31:25,951 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:31:25,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [38309798] [2022-04-05 02:31:25,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:31:25,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:31:25,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:31:25,953 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 02:31:25,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-05 02:31:25,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:31:25,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-05 02:31:25,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:31:26,083 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-05 02:31:26,083 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 02:31:26,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:31:26,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637034225] [2022-04-05 02:31:26,084 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:31:26,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38309798] [2022-04-05 02:31:26,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38309798] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 02:31:26,084 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 02:31:26,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-05 02:31:26,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16278512] [2022-04-05 02:31:26,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 02:31:26,085 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 02:31:26,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:31:26,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 02:31:26,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-05 02:31:26,086 INFO L87 Difference]: Start difference. First operand 56 states and 69 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-05 02:31:26,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:31:26,134 INFO L93 Difference]: Finished difference Result 77 states and 100 transitions. [2022-04-05 02:31:26,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-05 02:31:26,135 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2022-04-05 02:31:26,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:31:26,137 INFO L225 Difference]: With dead ends: 77 [2022-04-05 02:31:26,137 INFO L226 Difference]: Without dead ends: 77 [2022-04-05 02:31:26,137 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-05 02:31:26,138 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 8 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 02:31:26,138 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 152 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 02:31:26,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-04-05 02:31:26,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 74. [2022-04-05 02:31:26,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 44 states have (on average 1.2045454545454546) internal successors, (53), 45 states have internal predecessors, (53), 23 states have call successors, (23), 7 states have call predecessors, (23), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-04-05 02:31:26,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 97 transitions. [2022-04-05 02:31:26,158 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 97 transitions. Word has length 47 [2022-04-05 02:31:26,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:31:26,158 INFO L478 AbstractCegarLoop]: Abstraction has 74 states and 97 transitions. [2022-04-05 02:31:26,158 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-05 02:31:26,158 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 97 transitions. [2022-04-05 02:31:26,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-04-05 02:31:26,159 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:31:26,159 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 02:31:26,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-05 02:31:26,359 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:31:26,360 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:31:26,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:31:26,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1660248707, now seen corresponding path program 1 times [2022-04-05 02:31:26,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:31:26,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505413470] [2022-04-05 02:31:26,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:31:26,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:31:26,377 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:31:26,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1512148093] [2022-04-05 02:31:26,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:31:26,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:31:26,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:31:26,386 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 02:31:26,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-05 02:31:26,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:31:26,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-05 02:31:26,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:31:26,701 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-04-05 02:31:26,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 02:31:26,813 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-04-05 02:31:26,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:31:26,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505413470] [2022-04-05 02:31:26,813 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:31:26,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512148093] [2022-04-05 02:31:26,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512148093] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-05 02:31:26,813 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-05 02:31:26,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 11 [2022-04-05 02:31:26,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497739325] [2022-04-05 02:31:26,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 02:31:26,814 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 02:31:26,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:31:26,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 02:31:26,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-04-05 02:31:26,815 INFO L87 Difference]: Start difference. First operand 74 states and 97 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-04-05 02:31:26,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:31:26,963 INFO L93 Difference]: Finished difference Result 79 states and 101 transitions. [2022-04-05 02:31:26,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-05 02:31:26,963 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 52 [2022-04-05 02:31:26,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:31:26,964 INFO L225 Difference]: With dead ends: 79 [2022-04-05 02:31:26,965 INFO L226 Difference]: Without dead ends: 79 [2022-04-05 02:31:26,965 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-04-05 02:31:26,965 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 9 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 02:31:26,966 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 133 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 02:31:26,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-04-05 02:31:26,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2022-04-05 02:31:26,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 47 states have (on average 1.1914893617021276) internal successors, (56), 48 states have internal predecessors, (56), 23 states have call successors, (23), 8 states have call predecessors, (23), 7 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-04-05 02:31:26,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 100 transitions. [2022-04-05 02:31:26,971 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 100 transitions. Word has length 52 [2022-04-05 02:31:26,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:31:26,972 INFO L478 AbstractCegarLoop]: Abstraction has 78 states and 100 transitions. [2022-04-05 02:31:26,972 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-04-05 02:31:26,972 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 100 transitions. [2022-04-05 02:31:26,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-04-05 02:31:26,973 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:31:26,973 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 02:31:26,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-05 02:31:27,187 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:31:27,188 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:31:27,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:31:27,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1094467600, now seen corresponding path program 1 times [2022-04-05 02:31:27,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:31:27,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725417897] [2022-04-05 02:31:27,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:31:27,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:31:27,199 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:31:27,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1081462516] [2022-04-05 02:31:27,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:31:27,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:31:27,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:31:27,201 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 02:31:27,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-05 02:31:27,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:31:27,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 47 conjunts are in the unsatisfiable core [2022-04-05 02:31:27,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:31:28,112 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-05 02:31:28,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 02:31:29,077 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-05 02:31:29,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:31:29,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725417897] [2022-04-05 02:31:29,077 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:31:29,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081462516] [2022-04-05 02:31:29,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081462516] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 02:31:29,078 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 02:31:29,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 26 [2022-04-05 02:31:29,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135564378] [2022-04-05 02:31:29,078 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 02:31:29,078 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-05 02:31:29,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:31:29,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-05 02:31:29,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2022-04-05 02:31:29,079 INFO L87 Difference]: Start difference. First operand 78 states and 100 transitions. Second operand has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 21 states have internal predecessors, (49), 9 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-04-05 02:31:40,290 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 02:31:42,310 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-05 02:31:43,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:31:43,728 INFO L93 Difference]: Finished difference Result 245 states and 359 transitions. [2022-04-05 02:31:43,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-04-05 02:31:43,729 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 21 states have internal predecessors, (49), 9 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) Word has length 64 [2022-04-05 02:31:43,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:31:43,734 INFO L225 Difference]: With dead ends: 245 [2022-04-05 02:31:43,734 INFO L226 Difference]: Without dead ends: 243 [2022-04-05 02:31:43,736 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 713 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=533, Invalid=2659, Unknown=0, NotChecked=0, Total=3192 [2022-04-05 02:31:43,739 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 198 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 1557 mSolverCounterSat, 327 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 1886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 327 IncrementalHoareTripleChecker+Valid, 1557 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.0s IncrementalHoareTripleChecker+Time [2022-04-05 02:31:43,739 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 322 Invalid, 1886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [327 Valid, 1557 Invalid, 2 Unknown, 0 Unchecked, 10.0s Time] [2022-04-05 02:31:43,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-04-05 02:31:43,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 180. [2022-04-05 02:31:43,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 108 states have (on average 1.25) internal successors, (135), 110 states have internal predecessors, (135), 61 states have call successors, (61), 11 states have call predecessors, (61), 10 states have return successors, (58), 58 states have call predecessors, (58), 58 states have call successors, (58) [2022-04-05 02:31:43,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 254 transitions. [2022-04-05 02:31:43,754 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 254 transitions. Word has length 64 [2022-04-05 02:31:43,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:31:43,754 INFO L478 AbstractCegarLoop]: Abstraction has 180 states and 254 transitions. [2022-04-05 02:31:43,755 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 21 states have internal predecessors, (49), 9 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-04-05 02:31:43,755 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 254 transitions. [2022-04-05 02:31:43,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-04-05 02:31:43,756 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:31:43,756 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 02:31:43,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-05 02:31:43,956 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-04-05 02:31:43,957 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:31:43,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:31:43,958 INFO L85 PathProgramCache]: Analyzing trace with hash 248272623, now seen corresponding path program 2 times [2022-04-05 02:31:43,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:31:43,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326770558] [2022-04-05 02:31:43,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:31:43,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:31:43,968 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:31:43,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1510436655] [2022-04-05 02:31:43,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 02:31:43,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:31:43,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:31:43,969 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 02:31:43,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-05 02:31:44,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 02:31:44,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 02:31:44,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-05 02:31:44,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:31:44,176 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-04-05 02:31:44,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 02:31:44,328 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-04-05 02:31:44,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:31:44,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326770558] [2022-04-05 02:31:44,329 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:31:44,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510436655] [2022-04-05 02:31:44,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510436655] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 02:31:44,329 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 02:31:44,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-04-05 02:31:44,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901690543] [2022-04-05 02:31:44,329 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 02:31:44,330 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-05 02:31:44,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:31:44,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-05 02:31:44,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-04-05 02:31:44,331 INFO L87 Difference]: Start difference. First operand 180 states and 254 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-04-05 02:31:44,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:31:44,634 INFO L93 Difference]: Finished difference Result 191 states and 262 transitions. [2022-04-05 02:31:44,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-05 02:31:44,634 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 69 [2022-04-05 02:31:44,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:31:44,636 INFO L225 Difference]: With dead ends: 191 [2022-04-05 02:31:44,636 INFO L226 Difference]: Without dead ends: 191 [2022-04-05 02:31:44,636 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=137, Invalid=415, Unknown=0, NotChecked=0, Total=552 [2022-04-05 02:31:44,637 INFO L913 BasicCegarLoop]: 67 mSDtfsCounter, 58 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 02:31:44,637 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 266 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 02:31:44,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-04-05 02:31:44,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 174. [2022-04-05 02:31:44,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 105 states have (on average 1.180952380952381) internal successors, (124), 106 states have internal predecessors, (124), 59 states have call successors, (59), 10 states have call predecessors, (59), 9 states have return successors, (57), 57 states have call predecessors, (57), 57 states have call successors, (57) [2022-04-05 02:31:44,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 240 transitions. [2022-04-05 02:31:44,651 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 240 transitions. Word has length 69 [2022-04-05 02:31:44,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:31:44,651 INFO L478 AbstractCegarLoop]: Abstraction has 174 states and 240 transitions. [2022-04-05 02:31:44,651 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2022-04-05 02:31:44,651 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 240 transitions. [2022-04-05 02:31:44,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-04-05 02:31:44,652 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:31:44,652 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 02:31:44,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-05 02:31:44,884 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-04-05 02:31:44,884 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:31:44,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:31:44,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1757299226, now seen corresponding path program 1 times [2022-04-05 02:31:44,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:31:44,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291719964] [2022-04-05 02:31:44,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:31:44,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:31:44,899 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:31:44,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [794037329] [2022-04-05 02:31:44,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:31:44,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:31:44,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:31:44,902 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 02:31:44,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-05 02:31:44,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:31:44,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-05 02:31:44,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:31:45,181 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 8 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-04-05 02:31:45,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 02:31:45,442 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 22 proven. 8 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-04-05 02:31:45,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:31:45,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291719964] [2022-04-05 02:31:45,442 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:31:45,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794037329] [2022-04-05 02:31:45,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794037329] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 02:31:45,442 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 02:31:45,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2022-04-05 02:31:45,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418934047] [2022-04-05 02:31:45,443 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 02:31:45,443 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-05 02:31:45,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:31:45,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-05 02:31:45,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-04-05 02:31:45,444 INFO L87 Difference]: Start difference. First operand 174 states and 240 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 12 states have internal predecessors, (41), 6 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2022-04-05 02:31:45,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:31:45,636 INFO L93 Difference]: Finished difference Result 139 states and 184 transitions. [2022-04-05 02:31:45,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-05 02:31:45,637 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 12 states have internal predecessors, (41), 6 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) Word has length 72 [2022-04-05 02:31:45,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:31:45,638 INFO L225 Difference]: With dead ends: 139 [2022-04-05 02:31:45,638 INFO L226 Difference]: Without dead ends: 133 [2022-04-05 02:31:45,638 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2022-04-05 02:31:45,639 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 39 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 02:31:45,639 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 251 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 02:31:45,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-04-05 02:31:45,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 132. [2022-04-05 02:31:45,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 80 states have (on average 1.1625) internal successors, (93), 81 states have internal predecessors, (93), 43 states have call successors, (43), 9 states have call predecessors, (43), 8 states have return successors, (41), 41 states have call predecessors, (41), 41 states have call successors, (41) [2022-04-05 02:31:45,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 177 transitions. [2022-04-05 02:31:45,645 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 177 transitions. Word has length 72 [2022-04-05 02:31:45,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:31:45,645 INFO L478 AbstractCegarLoop]: Abstraction has 132 states and 177 transitions. [2022-04-05 02:31:45,646 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 12 states have internal predecessors, (41), 6 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2022-04-05 02:31:45,646 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 177 transitions. [2022-04-05 02:31:45,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-04-05 02:31:45,647 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 02:31:45,647 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 02:31:45,673 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-05 02:31:45,847 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-04-05 02:31:45,848 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 02:31:45,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 02:31:45,848 INFO L85 PathProgramCache]: Analyzing trace with hash 131640819, now seen corresponding path program 1 times [2022-04-05 02:31:45,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 02:31:45,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551551738] [2022-04-05 02:31:45,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:31:45,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 02:31:45,856 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 02:31:45,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [855767725] [2022-04-05 02:31:45,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 02:31:45,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 02:31:45,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 02:31:45,866 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-05 02:31:45,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-05 02:31:45,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 02:31:45,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-05 02:31:45,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 02:31:46,265 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 18 proven. 17 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2022-04-05 02:31:46,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 02:31:46,544 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 18 proven. 17 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2022-04-05 02:31:46,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 02:31:46,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551551738] [2022-04-05 02:31:46,544 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 02:31:46,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855767725] [2022-04-05 02:31:46,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855767725] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-05 02:31:46,544 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-05 02:31:46,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-04-05 02:31:46,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457208758] [2022-04-05 02:31:46,545 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-04-05 02:31:46,545 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-05 02:31:46,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 02:31:46,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-05 02:31:46,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-04-05 02:31:46,546 INFO L87 Difference]: Start difference. First operand 132 states and 177 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 8 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2022-04-05 02:31:46,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 02:31:46,778 INFO L93 Difference]: Finished difference Result 48 states and 55 transitions. [2022-04-05 02:31:46,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-05 02:31:46,779 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 8 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) Word has length 86 [2022-04-05 02:31:46,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 02:31:46,779 INFO L225 Difference]: With dead ends: 48 [2022-04-05 02:31:46,779 INFO L226 Difference]: Without dead ends: 0 [2022-04-05 02:31:46,779 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 156 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2022-04-05 02:31:46,780 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 24 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 02:31:46,780 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 219 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 02:31:46,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-04-05 02:31:46,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-04-05 02:31:46,781 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) [2022-04-05 02:31:46,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-04-05 02:31:46,781 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 86 [2022-04-05 02:31:46,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 02:31:46,781 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-04-05 02:31:46,781 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 8 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2022-04-05 02:31:46,782 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-05 02:31:46,782 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-05 02:31:46,784 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-05 02:31:46,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-05 02:31:47,007 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-04-05 02:31:47,010 INFO L719 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 02:31:47,011 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-04-05 02:31:47,013 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.04 02:31:47 BasicIcfg [2022-04-05 02:31:47,013 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-05 02:31:47,013 INFO L158 Benchmark]: Toolchain (without parser) took 26373.73ms. Allocated memory was 178.3MB in the beginning and 260.0MB in the end (delta: 81.8MB). Free memory was 119.6MB in the beginning and 221.7MB in the end (delta: -102.1MB). There was no memory consumed. Max. memory is 8.0GB. [2022-04-05 02:31:47,013 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 178.3MB. Free memory is still 135.9MB. There was no memory consumed. Max. memory is 8.0GB. [2022-04-05 02:31:47,014 INFO L158 Benchmark]: CACSL2BoogieTranslator took 230.06ms. Allocated memory was 178.3MB in the beginning and 216.0MB in the end (delta: 37.7MB). Free memory was 119.5MB in the beginning and 186.6MB in the end (delta: -67.1MB). Peak memory consumption was 10.3MB. Max. memory is 8.0GB. [2022-04-05 02:31:47,014 INFO L158 Benchmark]: Boogie Preprocessor took 25.50ms. Allocated memory is still 216.0MB. Free memory was 186.6MB in the beginning and 185.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-04-05 02:31:47,014 INFO L158 Benchmark]: RCFGBuilder took 308.21ms. Allocated memory is still 216.0MB. Free memory was 185.0MB in the beginning and 173.5MB in the end (delta: 11.6MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-04-05 02:31:47,014 INFO L158 Benchmark]: IcfgTransformer took 28.56ms. Allocated memory is still 216.0MB. Free memory was 173.5MB in the beginning and 171.9MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-04-05 02:31:47,015 INFO L158 Benchmark]: TraceAbstraction took 25776.29ms. Allocated memory was 216.0MB in the beginning and 260.0MB in the end (delta: 44.0MB). Free memory was 171.4MB in the beginning and 221.7MB in the end (delta: -50.3MB). There was no memory consumed. Max. memory is 8.0GB. [2022-04-05 02:31:47,016 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 178.3MB. Free memory is still 135.9MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 230.06ms. Allocated memory was 178.3MB in the beginning and 216.0MB in the end (delta: 37.7MB). Free memory was 119.5MB in the beginning and 186.6MB in the end (delta: -67.1MB). Peak memory consumption was 10.3MB. Max. memory is 8.0GB. * Boogie Preprocessor took 25.50ms. Allocated memory is still 216.0MB. Free memory was 186.6MB in the beginning and 185.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 308.21ms. Allocated memory is still 216.0MB. Free memory was 185.0MB in the beginning and 173.5MB in the end (delta: 11.6MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * IcfgTransformer took 28.56ms. Allocated memory is still 216.0MB. Free memory was 173.5MB in the beginning and 171.9MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 25776.29ms. Allocated memory was 216.0MB in the beginning and 260.0MB in the end (delta: 44.0MB). Free memory was 171.4MB in the beginning and 221.7MB in the end (delta: -50.3MB). There was no memory consumed. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 13]: 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 5 procedures, 40 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 25.7s, OverallIterations: 12, TraceHistogramMax: 9, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 16.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 2 mSolverCounterUnknown, 645 SdHoareTripleChecker+Valid, 11.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 594 mSDsluCounter, 2314 SdHoareTripleChecker+Invalid, 10.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1788 mSDsCounter, 642 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2982 IncrementalHoareTripleChecker+Invalid, 3626 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 642 mSolverCounterUnsat, 526 mSDtfsCounter, 2982 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1132 GetRequests, 935 SyntacticMatches, 7 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 961 ImplicationChecksByTransitivity, 6.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=180occurred in iteration=9, InterpolantAutomatonStates: 131, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 12 MinimizatonAttempts, 131 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 5.5s InterpolantComputationTime, 617 NumberOfCodeBlocks, 617 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 1058 ConstructedInterpolants, 0 QuantifiedInterpolants, 3872 SizeOfPredicates, 53 NumberOfNonLiveVariables, 1688 ConjunctsInSsa, 173 ConjunctsInUnsatCore, 20 InterpolantComputations, 5 PerfectInterpolantSequences, 968/1098 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! [2022-04-05 02:31:47,038 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...