/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/geo3-ll_unwindbound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 08:38:41,860 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 08:38:41,862 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 08:38:41,886 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 08:38:41,886 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 08:38:41,887 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 08:38:41,888 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 08:38:41,890 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 08:38:41,891 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 08:38:41,892 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 08:38:41,893 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 08:38:41,894 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 08:38:41,894 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 08:38:41,895 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 08:38:41,896 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 08:38:41,897 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 08:38:41,897 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 08:38:41,898 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 08:38:41,899 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 08:38:41,901 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 08:38:41,902 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 08:38:41,903 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 08:38:41,904 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 08:38:41,905 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 08:38:41,907 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-05-06 08:38:41,907 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-05-06 08:38:41,908 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-05-06 08:38:41,908 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-05-06 08:38:41,909 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-05-06 08:38:41,909 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-05-06 08:38:41,910 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-06 08:38:41,910 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-06 08:38:41,911 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-06 08:38:41,912 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-06 08:38:41,913 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-06 08:38:41,913 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-06 08:38:41,913 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-06 08:38:41,914 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-06 08:38:41,914 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 08:38:41,915 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 08:38:41,915 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 08:38:41,916 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 08:38:41,924 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 08:38:41,924 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 08:38:41,926 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 08:38:41,926 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 08:38:41,926 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 08:38:41,926 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 08:38:41,926 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 08:38:41,926 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 08:38:41,927 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 08:38:41,927 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 08:38:41,927 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 08:38:41,927 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 08:38:41,927 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 08:38:41,927 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 08:38:41,927 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 08:38:41,928 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 08:38:41,928 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 08:38:41,928 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 08:38:41,928 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 08:38:41,928 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 08:38:41,928 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 08:38:41,929 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 08:38:41,929 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 08:38:42,229 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 08:38:42,249 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 08:38:42,251 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 08:38:42,251 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 08:38:42,254 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 08:38:42,255 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/geo3-ll_unwindbound10.c [2021-05-06 08:38:42,317 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/681a67dfc/de42695ab7854c37a86082abc94e105f/FLAG5ad8e32ea [2021-05-06 08:38:42,896 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 08:38:42,897 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/geo3-ll_unwindbound10.c [2021-05-06 08:38:42,902 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/681a67dfc/de42695ab7854c37a86082abc94e105f/FLAG5ad8e32ea [2021-05-06 08:38:43,322 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/681a67dfc/de42695ab7854c37a86082abc94e105f [2021-05-06 08:38:43,326 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 08:38:43,327 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 08:38:43,330 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 08:38:43,330 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 08:38:43,333 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 08:38:43,333 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:38:43" (1/1) ... [2021-05-06 08:38:43,335 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24d13879 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:38:43, skipping insertion in model container [2021-05-06 08:38:43,335 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:38:43" (1/1) ... [2021-05-06 08:38:43,340 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 08:38:43,354 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 08:38:43,458 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/geo3-ll_unwindbound10.c[525,538] [2021-05-06 08:38:43,478 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:38:43,485 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 08:38:43,496 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/geo3-ll_unwindbound10.c[525,538] [2021-05-06 08:38:43,511 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:38:43,525 INFO L208 MainTranslator]: Completed translation [2021-05-06 08:38:43,526 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:38:43 WrapperNode [2021-05-06 08:38:43,526 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 08:38:43,527 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 08:38:43,527 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 08:38:43,527 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 08:38:43,560 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:38:43" (1/1) ... [2021-05-06 08:38:43,561 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:38:43" (1/1) ... [2021-05-06 08:38:43,566 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:38:43" (1/1) ... [2021-05-06 08:38:43,566 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:38:43" (1/1) ... [2021-05-06 08:38:43,570 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:38:43" (1/1) ... [2021-05-06 08:38:43,582 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:38:43" (1/1) ... [2021-05-06 08:38:43,583 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:38:43" (1/1) ... [2021-05-06 08:38:43,584 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 08:38:43,585 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 08:38:43,585 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 08:38:43,585 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 08:38:43,585 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:38:43" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 08:38:43,662 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 08:38:43,662 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 08:38:43,663 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 08:38:43,663 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 08:38:43,663 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 08:38:43,663 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 08:38:43,664 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 08:38:43,664 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 08:38:43,664 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 08:38:43,664 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 08:38:43,664 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 08:38:43,665 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 08:38:43,665 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 08:38:43,665 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 08:38:43,665 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 08:38:43,665 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 08:38:43,666 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 08:38:43,666 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 08:38:43,666 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 08:38:43,666 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 08:38:43,921 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 08:38:43,922 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 08:38:43,930 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:38:43 BoogieIcfgContainer [2021-05-06 08:38:43,930 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 08:38:43,931 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 08:38:43,931 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 08:38:43,932 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 08:38:43,946 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:38:43" (1/1) ... [2021-05-06 08:38:43,962 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:38:43 BasicIcfg [2021-05-06 08:38:43,962 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 08:38:43,963 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 08:38:43,963 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 08:38:43,965 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 08:38:43,965 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 08:38:43" (1/4) ... [2021-05-06 08:38:43,966 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57167706 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:38:43, skipping insertion in model container [2021-05-06 08:38:43,966 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:38:43" (2/4) ... [2021-05-06 08:38:43,966 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57167706 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:38:43, skipping insertion in model container [2021-05-06 08:38:43,967 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:38:43" (3/4) ... [2021-05-06 08:38:43,967 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57167706 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 08:38:43, skipping insertion in model container [2021-05-06 08:38:43,967 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:38:43" (4/4) ... [2021-05-06 08:38:43,968 INFO L111 eAbstractionObserver]: Analyzing ICFG geo3-ll_unwindbound10.cJordan [2021-05-06 08:38:43,972 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 08:38:43,975 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 08:38:43,988 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 08:38:44,003 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 08:38:44,004 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 08:38:44,004 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 08:38:44,004 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 08:38:44,004 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 08:38:44,004 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 08:38:44,004 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 08:38:44,004 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 08:38:44,015 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 08:38:44,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-06 08:38:44,021 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:38:44,021 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:38:44,021 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:38:44,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:38:44,026 INFO L82 PathProgramCache]: Analyzing trace with hash -630084848, now seen corresponding path program 1 times [2021-05-06 08:38:44,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:38:44,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526160201] [2021-05-06 08:38:44,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:38:44,109 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:38:44,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [508291449] [2021-05-06 08:38:44,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:38:44,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:38:44,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 1 conjunts are in the unsatisfiable core [2021-05-06 08:38:44,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:38:44,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 08:38:44,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:38:44,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526160201] [2021-05-06 08:38:44,235 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:38:44,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508291449] [2021-05-06 08:38:44,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508291449] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:38:44,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:38:44,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-06 08:38:44,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269142694] [2021-05-06 08:38:44,240 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-05-06 08:38:44,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:38:44,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-05-06 08:38:44,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-05-06 08:38:44,252 INFO L87 Difference]: Start difference. First operand has 22 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 08:38:44,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:38:44,263 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2021-05-06 08:38:44,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-05-06 08:38:44,264 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-06 08:38:44,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:38:44,269 INFO L225 Difference]: With dead ends: 22 [2021-05-06 08:38:44,269 INFO L226 Difference]: Without dead ends: 17 [2021-05-06 08:38:44,270 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-05-06 08:38:44,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-05-06 08:38:44,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-05-06 08:38:44,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 08:38:44,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-05-06 08:38:44,293 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2021-05-06 08:38:44,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:38:44,293 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-05-06 08:38:44,293 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 08:38:44,293 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-05-06 08:38:44,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 08:38:44,294 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:38:44,294 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:38:44,503 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-05-06 08:38:44,503 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:38:44,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:38:44,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1971636769, now seen corresponding path program 1 times [2021-05-06 08:38:44,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:38:44,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471563846] [2021-05-06 08:38:44,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:38:44,528 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:38:44,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1941703365] [2021-05-06 08:38:44,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:38:44,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:38:44,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 08:38:44,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:38:44,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:38:44,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:38:44,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:38:44,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:38:44,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:38:44,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 08:38:44,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:38:44,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471563846] [2021-05-06 08:38:44,720 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:38:44,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941703365] [2021-05-06 08:38:44,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941703365] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:38:44,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:38:44,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 08:38:44,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624506463] [2021-05-06 08:38:44,722 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 08:38:44,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:38:44,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 08:38:44,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 08:38:44,723 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 08:38:44,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:38:44,734 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2021-05-06 08:38:44,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 08:38:44,735 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-06 08:38:44,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:38:44,736 INFO L225 Difference]: With dead ends: 19 [2021-05-06 08:38:44,736 INFO L226 Difference]: Without dead ends: 19 [2021-05-06 08:38:44,736 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.6ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 08:38:44,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-05-06 08:38:44,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-05-06 08:38:44,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 08:38:44,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-05-06 08:38:44,740 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 12 [2021-05-06 08:38:44,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:38:44,740 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-05-06 08:38:44,741 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 08:38:44,741 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-05-06 08:38:44,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 08:38:44,741 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:38:44,741 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:38:44,964 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:38:44,965 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:38:44,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:38:44,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1972709245, now seen corresponding path program 1 times [2021-05-06 08:38:44,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:38:44,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834995082] [2021-05-06 08:38:44,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:38:44,979 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:38:44,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2137097521] [2021-05-06 08:38:44,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:38:45,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:38:45,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 08:38:45,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:38:45,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:38:45,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:38:45,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:38:45,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 08:38:45,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:38:45,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834995082] [2021-05-06 08:38:45,191 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:38:45,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137097521] [2021-05-06 08:38:45,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137097521] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:38:45,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:38:45,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:38:45,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900233547] [2021-05-06 08:38:45,192 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:38:45,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:38:45,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:38:45,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:38:45,193 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 08:38:45,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:38:45,230 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2021-05-06 08:38:45,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:38:45,231 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-06 08:38:45,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:38:45,231 INFO L225 Difference]: With dead ends: 26 [2021-05-06 08:38:45,232 INFO L226 Difference]: Without dead ends: 25 [2021-05-06 08:38:45,232 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.1ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:38:45,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-06 08:38:45,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-05-06 08:38:45,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 08:38:45,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2021-05-06 08:38:45,236 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 12 [2021-05-06 08:38:45,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:38:45,236 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2021-05-06 08:38:45,236 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 08:38:45,236 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2021-05-06 08:38:45,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-06 08:38:45,237 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:38:45,237 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:38:45,455 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:38:45,455 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:38:45,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:38:45,456 INFO L82 PathProgramCache]: Analyzing trace with hash -832305310, now seen corresponding path program 1 times [2021-05-06 08:38:45,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:38:45,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810160546] [2021-05-06 08:38:45,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:38:45,468 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:38:45,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [797825173] [2021-05-06 08:38:45,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:38:45,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:38:45,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:38:45,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:38:45,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:38:45,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:38:45,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:38:45,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:38:45,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:38:45,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:38:45,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:38:45,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:38:45,631 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 08:38:45,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:38:45,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810160546] [2021-05-06 08:38:45,631 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:38:45,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797825173] [2021-05-06 08:38:45,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797825173] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:38:45,631 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:38:45,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-06 08:38:45,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210638596] [2021-05-06 08:38:45,632 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:38:45,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:38:45,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:38:45,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:38:45,633 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 08:38:45,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:38:45,660 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2021-05-06 08:38:45,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:38:45,661 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-06 08:38:45,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:38:45,661 INFO L225 Difference]: With dead ends: 27 [2021-05-06 08:38:45,661 INFO L226 Difference]: Without dead ends: 27 [2021-05-06 08:38:45,662 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 15.0ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:38:45,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-06 08:38:45,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-06 08:38:45,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 08:38:45,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2021-05-06 08:38:45,666 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 20 [2021-05-06 08:38:45,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:38:45,666 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2021-05-06 08:38:45,666 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 08:38:45,666 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2021-05-06 08:38:45,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-06 08:38:45,667 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:38:45,667 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:38:45,889 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:38:45,890 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:38:45,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:38:45,890 INFO L82 PathProgramCache]: Analyzing trace with hash -831232834, now seen corresponding path program 1 times [2021-05-06 08:38:45,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:38:45,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759833758] [2021-05-06 08:38:45,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:38:45,911 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:38:45,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [166288351] [2021-05-06 08:38:45,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:38:45,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:38:45,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 08:38:45,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:38:46,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:38:46,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:38:46,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:38:46,093 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 08:38:46,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:38:46,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759833758] [2021-05-06 08:38:46,094 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:38:46,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166288351] [2021-05-06 08:38:46,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166288351] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:38:46,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:38:46,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 08:38:46,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228721995] [2021-05-06 08:38:46,095 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:38:46,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:38:46,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:38:46,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:38:46,096 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 08:38:46,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:38:46,137 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2021-05-06 08:38:46,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:38:46,138 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-06 08:38:46,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:38:46,139 INFO L225 Difference]: With dead ends: 34 [2021-05-06 08:38:46,139 INFO L226 Difference]: Without dead ends: 33 [2021-05-06 08:38:46,139 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.2ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:38:46,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-06 08:38:46,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-06 08:38:46,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 08:38:46,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2021-05-06 08:38:46,143 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 20 [2021-05-06 08:38:46,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:38:46,143 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2021-05-06 08:38:46,144 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 08:38:46,144 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2021-05-06 08:38:46,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 08:38:46,144 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:38:46,145 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:38:46,361 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:38:46,362 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:38:46,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:38:46,362 INFO L82 PathProgramCache]: Analyzing trace with hash -870943837, now seen corresponding path program 2 times [2021-05-06 08:38:46,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:38:46,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87756675] [2021-05-06 08:38:46,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:38:46,373 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:38:46,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [412681747] [2021-05-06 08:38:46,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:38:46,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:38:46,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:38:46,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 08:38:46,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:38:46,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:38:46,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:38:46,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:38:46,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:38:46,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:38:46,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:38:46,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:38:46,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:38:46,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:38:46,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:38:46,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:38:46,547 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 08:38:46,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:38:46,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87756675] [2021-05-06 08:38:46,548 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:38:46,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412681747] [2021-05-06 08:38:46,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412681747] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:38:46,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:38:46,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 08:38:46,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285177083] [2021-05-06 08:38:46,549 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:38:46,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:38:46,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:38:46,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:38:46,550 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 08:38:46,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:38:46,603 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2021-05-06 08:38:46,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:38:46,606 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2021-05-06 08:38:46,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:38:46,608 INFO L225 Difference]: With dead ends: 35 [2021-05-06 08:38:46,608 INFO L226 Difference]: Without dead ends: 35 [2021-05-06 08:38:46,609 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 26.8ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:38:46,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-06 08:38:46,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-06 08:38:46,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 24 states have (on average 1.125) internal successors, (27), 25 states have internal predecessors, (27), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 08:38:46,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2021-05-06 08:38:46,614 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 28 [2021-05-06 08:38:46,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:38:46,614 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2021-05-06 08:38:46,614 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 08:38:46,614 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2021-05-06 08:38:46,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 08:38:46,615 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:38:46,615 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:38:46,828 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:38:46,829 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:38:46,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:38:46,829 INFO L82 PathProgramCache]: Analyzing trace with hash -869871361, now seen corresponding path program 2 times [2021-05-06 08:38:46,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:38:46,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635739043] [2021-05-06 08:38:46,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:38:46,838 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:38:46,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1801917594] [2021-05-06 08:38:46,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:38:46,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:38:46,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:38:46,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-06 08:38:46,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:38:47,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:38:47,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:38:47,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:38:47,095 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 08:38:47,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:38:47,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635739043] [2021-05-06 08:38:47,095 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:38:47,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801917594] [2021-05-06 08:38:47,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801917594] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:38:47,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:38:47,096 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:38:47,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730216999] [2021-05-06 08:38:47,096 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:38:47,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:38:47,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:38:47,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:38:47,097 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 08:38:47,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:38:47,413 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2021-05-06 08:38:47,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:38:47,415 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2021-05-06 08:38:47,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:38:47,416 INFO L225 Difference]: With dead ends: 42 [2021-05-06 08:38:47,416 INFO L226 Difference]: Without dead ends: 41 [2021-05-06 08:38:47,416 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 78.5ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:38:47,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-06 08:38:47,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-05-06 08:38:47,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 29 states have internal predecessors, (31), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 08:38:47,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2021-05-06 08:38:47,420 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 28 [2021-05-06 08:38:47,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:38:47,420 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2021-05-06 08:38:47,421 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 08:38:47,421 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2021-05-06 08:38:47,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-06 08:38:47,421 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:38:47,421 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:38:47,636 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:38:47,637 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:38:47,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:38:47,637 INFO L82 PathProgramCache]: Analyzing trace with hash 2080181988, now seen corresponding path program 3 times [2021-05-06 08:38:47,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:38:47,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763764613] [2021-05-06 08:38:47,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:38:47,645 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:38:47,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1797601446] [2021-05-06 08:38:47,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:38:47,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-06 08:38:47,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:38:47,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-06 08:38:47,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:38:47,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:38:47,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:38:47,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:38:47,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:38:47,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:38:47,884 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-06 08:38:47,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:38:47,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763764613] [2021-05-06 08:38:47,885 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:38:47,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797601446] [2021-05-06 08:38:47,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797601446] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:38:47,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:38:47,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:38:47,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150760364] [2021-05-06 08:38:47,885 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:38:47,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:38:47,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:38:47,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:38:47,886 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3)