/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/ps5-ll_unwindbound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 22:29:25,989 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 22:29:25,991 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 22:29:26,027 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 22:29:26,027 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 22:29:26,030 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 22:29:26,032 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 22:29:26,038 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 22:29:26,040 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 22:29:26,046 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 22:29:26,047 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 22:29:26,048 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 22:29:26,048 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 22:29:26,050 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 22:29:26,052 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 22:29:26,053 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 22:29:26,057 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 22:29:26,058 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 22:29:26,060 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 22:29:26,065 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 22:29:26,066 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 22:29:26,067 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 22:29:26,067 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 22:29:26,069 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 22:29:26,074 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-05-02 22:29:26,075 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-05-02 22:29:26,075 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-05-02 22:29:26,075 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-05-02 22:29:26,076 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-05-02 22:29:26,076 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-05-02 22:29:26,076 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-02 22:29:26,077 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-02 22:29:26,077 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-02 22:29:26,077 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-02 22:29:26,078 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-02 22:29:26,078 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-02 22:29:26,079 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-02 22:29:26,079 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-02 22:29:26,079 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 22:29:26,079 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 22:29:26,080 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 22:29:26,086 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 22:29:26,099 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 22:29:26,100 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 22:29:26,102 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 22:29:26,103 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 22:29:26,103 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 22:29:26,103 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 22:29:26,103 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 22:29:26,103 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 22:29:26,103 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 22:29:26,103 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 22:29:26,104 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 22:29:26,104 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 22:29:26,104 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 22:29:26,104 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 22:29:26,104 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 22:29:26,105 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 22:29:26,105 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 22:29:26,105 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 22:29:26,105 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 22:29:26,105 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 22:29:26,105 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 22:29:26,106 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 22:29:26,106 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 22:29:26,424 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 22:29:26,449 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 22:29:26,451 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 22:29:26,452 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 22:29:26,453 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 22:29:26,454 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps5-ll_unwindbound5.c [2021-05-02 22:29:26,513 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84d6ec8bf/3f284c1d47634b8c8732ff5325f56e31/FLAG051ee4907 [2021-05-02 22:29:26,881 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 22:29:26,882 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps5-ll_unwindbound5.c [2021-05-02 22:29:26,886 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84d6ec8bf/3f284c1d47634b8c8732ff5325f56e31/FLAG051ee4907 [2021-05-02 22:29:27,294 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84d6ec8bf/3f284c1d47634b8c8732ff5325f56e31 [2021-05-02 22:29:27,295 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 22:29:27,298 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 22:29:27,300 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 22:29:27,300 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 22:29:27,302 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 22:29:27,303 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 10:29:27" (1/1) ... [2021-05-02 22:29:27,303 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3550095c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:29:27, skipping insertion in model container [2021-05-02 22:29:27,304 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 10:29:27" (1/1) ... [2021-05-02 22:29:27,308 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 22:29:27,320 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 22:29:27,447 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/ps5-ll_unwindbound5.c[458,471] [2021-05-02 22:29:27,458 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 22:29:27,463 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 22:29:27,506 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/ps5-ll_unwindbound5.c[458,471] [2021-05-02 22:29:27,512 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 22:29:27,523 INFO L208 MainTranslator]: Completed translation [2021-05-02 22:29:27,523 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:29:27 WrapperNode [2021-05-02 22:29:27,524 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 22:29:27,526 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 22:29:27,526 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 22:29:27,526 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 22:29:27,533 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:29:27" (1/1) ... [2021-05-02 22:29:27,533 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:29:27" (1/1) ... [2021-05-02 22:29:27,538 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:29:27" (1/1) ... [2021-05-02 22:29:27,538 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:29:27" (1/1) ... [2021-05-02 22:29:27,548 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:29:27" (1/1) ... [2021-05-02 22:29:27,550 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:29:27" (1/1) ... [2021-05-02 22:29:27,551 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:29:27" (1/1) ... [2021-05-02 22:29:27,552 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 22:29:27,553 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 22:29:27,553 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 22:29:27,553 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 22:29:27,554 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:29:27" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 22:29:27,601 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 22:29:27,602 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 22:29:27,602 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 22:29:27,602 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 22:29:27,602 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 22:29:27,602 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 22:29:27,602 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 22:29:27,602 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 22:29:27,602 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 22:29:27,602 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 22:29:27,602 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2021-05-02 22:29:27,602 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 22:29:27,602 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 22:29:27,602 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 22:29:27,603 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 22:29:27,603 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 22:29:27,603 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 22:29:27,603 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 22:29:27,603 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 22:29:27,603 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 22:29:27,802 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 22:29:27,802 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 22:29:27,803 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 10:29:27 BoogieIcfgContainer [2021-05-02 22:29:27,803 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 22:29:27,804 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 22:29:27,804 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 22:29:27,804 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 22:29:27,806 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 10:29:27" (1/1) ... [2021-05-02 22:29:27,816 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 10:29:27 BasicIcfg [2021-05-02 22:29:27,816 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 22:29:27,817 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 22:29:27,817 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 22:29:27,819 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 22:29:27,819 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 10:29:27" (1/4) ... [2021-05-02 22:29:27,819 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d96af54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 10:29:27, skipping insertion in model container [2021-05-02 22:29:27,819 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:29:27" (2/4) ... [2021-05-02 22:29:27,820 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d96af54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 10:29:27, skipping insertion in model container [2021-05-02 22:29:27,820 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 10:29:27" (3/4) ... [2021-05-02 22:29:27,820 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d96af54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 10:29:27, skipping insertion in model container [2021-05-02 22:29:27,820 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 10:29:27" (4/4) ... [2021-05-02 22:29:27,820 INFO L111 eAbstractionObserver]: Analyzing ICFG ps5-ll_unwindbound5.cJordan [2021-05-02 22:29:27,823 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 22:29:27,826 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 22:29:27,835 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 22:29:27,846 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 22:29:27,846 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 22:29:27,846 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 22:29:27,846 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 22:29:27,846 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 22:29:27,846 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 22:29:27,846 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 22:29:27,846 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 22:29:27,853 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 22:29:27,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 22:29:27,857 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:29:27,858 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:29:27,858 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:29:27,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:29:27,863 INFO L82 PathProgramCache]: Analyzing trace with hash 843387237, now seen corresponding path program 1 times [2021-05-02 22:29:27,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:29:27,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264067516] [2021-05-02 22:29:27,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:29:27,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:29:27,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 22:29:27,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:29:28,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 22:29:28,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:29:28,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:29:28,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:29:28,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264067516] [2021-05-02 22:29:28,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264067516] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 22:29:28,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 22:29:28,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 22:29:28,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578411528] [2021-05-02 22:29:28,010 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 22:29:28,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:29:28,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 22:29:28,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 22:29:28,019 INFO L87 Difference]: Start difference. First operand has 29 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 22:29:28,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:29:28,064 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2021-05-02 22:29:28,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 22:29:28,066 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-02 22:29:28,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:29:28,070 INFO L225 Difference]: With dead ends: 30 [2021-05-02 22:29:28,070 INFO L226 Difference]: Without dead ends: 25 [2021-05-02 22:29:28,071 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 22:29:28,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-02 22:29:28,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2021-05-02 22:29:28,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 22:29:28,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-05-02 22:29:28,090 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 17 [2021-05-02 22:29:28,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:29:28,090 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-05-02 22:29:28,090 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 22:29:28,091 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-05-02 22:29:28,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 22:29:28,091 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:29:28,091 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:29:28,091 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 22:29:28,091 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:29:28,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:29:28,092 INFO L82 PathProgramCache]: Analyzing trace with hash 208087835, now seen corresponding path program 1 times [2021-05-02 22:29:28,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:29:28,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906804450] [2021-05-02 22:29:28,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:29:28,105 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:29:28,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1828399392] [2021-05-02 22:29:28,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:29:28,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:29:28,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 22:29:28,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:29:28,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:29:28,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:29:28,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:29:28,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:29:28,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:29:28,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:29:28,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:29:28,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906804450] [2021-05-02 22:29:28,373 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:29:28,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828399392] [2021-05-02 22:29:28,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828399392] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 22:29:28,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 22:29:28,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 22:29:28,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750669147] [2021-05-02 22:29:28,374 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 22:29:28,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:29:28,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 22:29:28,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 22:29:28,376 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 22:29:28,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:29:28,389 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2021-05-02 22:29:28,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 22:29:28,390 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2021-05-02 22:29:28,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:29:28,392 INFO L225 Difference]: With dead ends: 26 [2021-05-02 22:29:28,392 INFO L226 Difference]: Without dead ends: 26 [2021-05-02 22:29:28,393 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.0ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 22:29:28,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-02 22:29:28,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-05-02 22:29:28,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 22:29:28,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2021-05-02 22:29:28,401 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 18 [2021-05-02 22:29:28,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:29:28,402 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2021-05-02 22:29:28,402 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 22:29:28,402 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2021-05-02 22:29:28,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 22:29:28,409 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:29:28,409 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:29:28,623 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 22:29:28,623 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:29:28,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:29:28,624 INFO L82 PathProgramCache]: Analyzing trace with hash 209190102, now seen corresponding path program 1 times [2021-05-02 22:29:28,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:29:28,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904180071] [2021-05-02 22:29:28,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:29:28,646 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:29:28,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2070667786] [2021-05-02 22:29:28,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:29:28,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:29:28,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 22:29:28,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:29:28,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:29:28,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:29:28,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:29:28,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904180071] [2021-05-02 22:29:28,839 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:29:28,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070667786] [2021-05-02 22:29:28,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070667786] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 22:29:28,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 22:29:28,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-02 22:29:28,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845878645] [2021-05-02 22:29:28,839 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 22:29:28,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:29:28,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 22:29:28,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 22:29:28,840 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 22:29:28,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:29:28,884 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2021-05-02 22:29:28,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 22:29:28,885 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-02 22:29:28,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:29:28,885 INFO L225 Difference]: With dead ends: 34 [2021-05-02 22:29:28,886 INFO L226 Difference]: Without dead ends: 32 [2021-05-02 22:29:28,886 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 47.0ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 22:29:28,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-02 22:29:28,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-02 22:29:28,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 22:29:28,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2021-05-02 22:29:28,890 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 18 [2021-05-02 22:29:28,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:29:28,890 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2021-05-02 22:29:28,890 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 22:29:28,890 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2021-05-02 22:29:28,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-02 22:29:28,891 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:29:28,891 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:29:29,105 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:29:29,105 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:29:29,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:29:29,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1223799235, now seen corresponding path program 1 times [2021-05-02 22:29:29,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:29:29,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217041113] [2021-05-02 22:29:29,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:29:29,114 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:29:29,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [326838632] [2021-05-02 22:29:29,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:29:29,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:29:29,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 22:29:29,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:29:29,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:29:29,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:29:29,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:29:29,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:29:29,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:29:29,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:29:29,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:29:29,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:29:29,218 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:29:29,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:29:29,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217041113] [2021-05-02 22:29:29,219 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:29:29,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326838632] [2021-05-02 22:29:29,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326838632] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:29:29,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:29:29,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 22:29:29,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026497802] [2021-05-02 22:29:29,219 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 22:29:29,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:29:29,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 22:29:29,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 22:29:29,220 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 22:29:29,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:29:29,240 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2021-05-02 22:29:29,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 22:29:29,240 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 26 [2021-05-02 22:29:29,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:29:29,241 INFO L225 Difference]: With dead ends: 34 [2021-05-02 22:29:29,241 INFO L226 Difference]: Without dead ends: 34 [2021-05-02 22:29:29,241 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 10.3ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 22:29:29,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-02 22:29:29,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-05-02 22:29:29,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 22:29:29,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2021-05-02 22:29:29,244 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 26 [2021-05-02 22:29:29,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:29:29,244 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2021-05-02 22:29:29,244 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 22:29:29,244 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2021-05-02 22:29:29,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-02 22:29:29,244 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:29:29,245 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:29:29,460 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:29:29,460 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:29:29,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:29:29,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1222696968, now seen corresponding path program 1 times [2021-05-02 22:29:29,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:29:29,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597876360] [2021-05-02 22:29:29,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:29:29,471 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:29:29,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [586189718] [2021-05-02 22:29:29,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:29:29,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:29:29,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 22:29:29,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:29:29,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:29:29,635 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:29:29,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:29:29,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597876360] [2021-05-02 22:29:29,635 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:29:29,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586189718] [2021-05-02 22:29:29,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586189718] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:29:29,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:29:29,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 22:29:29,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228415504] [2021-05-02 22:29:29,636 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 22:29:29,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:29:29,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 22:29:29,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 22:29:29,637 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 22:29:32,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:29:32,295 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2021-05-02 22:29:32,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 22:29:32,296 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2021-05-02 22:29:32,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:29:32,296 INFO L225 Difference]: With dead ends: 42 [2021-05-02 22:29:32,296 INFO L226 Difference]: Without dead ends: 42 [2021-05-02 22:29:32,297 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 33.4ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-02 22:29:32,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-02 22:29:32,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2021-05-02 22:29:32,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 28 states have internal predecessors, (30), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 22:29:32,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2021-05-02 22:29:32,300 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 26 [2021-05-02 22:29:32,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:29:32,300 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2021-05-02 22:29:32,300 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 22:29:32,300 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2021-05-02 22:29:32,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 22:29:32,300 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:29:32,301 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:29:32,504 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:29:32,504 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:29:32,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:29:32,505 INFO L82 PathProgramCache]: Analyzing trace with hash -688312481, now seen corresponding path program 2 times [2021-05-02 22:29:32,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:29:32,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414016619] [2021-05-02 22:29:32,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:29:32,512 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:29:32,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1799233300] [2021-05-02 22:29:32,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:29:32,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 22:29:32,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:29:32,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 22:29:32,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:29:32,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:29:32,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:29:32,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:29:32,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:29:32,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:29:32,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:29:32,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:29:32,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:29:32,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:29:32,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:29:32,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:29:32,693 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:29:32,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:29:32,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414016619] [2021-05-02 22:29:32,694 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:29:32,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799233300] [2021-05-02 22:29:32,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799233300] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:29:32,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:29:32,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 22:29:32,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411698430] [2021-05-02 22:29:32,694 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 22:29:32,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:29:32,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 22:29:32,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 22:29:32,695 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 22:29:32,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:29:32,749 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2021-05-02 22:29:32,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 22:29:32,750 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Word has length 34 [2021-05-02 22:29:32,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:29:32,751 INFO L225 Difference]: With dead ends: 50 [2021-05-02 22:29:32,751 INFO L226 Difference]: Without dead ends: 48 [2021-05-02 22:29:32,751 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 20.5ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-02 22:29:32,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-02 22:29:32,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2021-05-02 22:29:32,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 31 states have internal predecessors, (34), 10 states have call successors, (10), 7 states have call predecessors, (10), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 22:29:32,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2021-05-02 22:29:32,755 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 34 [2021-05-02 22:29:32,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:29:32,755 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2021-05-02 22:29:32,755 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 22:29:32,755 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2021-05-02 22:29:32,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 22:29:32,756 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:29:32,756 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:29:32,971 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 22:29:32,972 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:29:32,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:29:32,972 INFO L82 PathProgramCache]: Analyzing trace with hash -687210214, now seen corresponding path program 2 times [2021-05-02 22:29:32,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:29:32,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358244907] [2021-05-02 22:29:32,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:29:32,980 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:29:32,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1836241000] [2021-05-02 22:29:32,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:29:33,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 22:29:33,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:29:33,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-02 22:29:33,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:29:35,340 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 22:29:35,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:29:35,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358244907] [2021-05-02 22:29:35,341 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:29:35,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836241000] [2021-05-02 22:29:35,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836241000] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:29:35,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:29:35,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 22:29:35,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744868946] [2021-05-02 22:29:35,341 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 22:29:35,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:29:35,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 22:29:35,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 22:29:35,342 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 22:29:35,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:29:35,547 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2021-05-02 22:29:35,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 22:29:35,548 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 34 [2021-05-02 22:29:35,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:29:35,550 INFO L225 Difference]: With dead ends: 54 [2021-05-02 22:29:35,550 INFO L226 Difference]: Without dead ends: 54 [2021-05-02 22:29:35,550 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 2138.7ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-02 22:29:35,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-02 22:29:35,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2021-05-02 22:29:35,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 36 states have internal predecessors, (39), 12 states have call successors, (12), 8 states have call predecessors, (12), 6 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 22:29:35,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2021-05-02 22:29:35,568 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 34 [2021-05-02 22:29:35,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:29:35,568 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2021-05-02 22:29:35,568 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 22:29:35,568 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2021-05-02 22:29:35,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-02 22:29:35,569 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:29:35,569 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:29:35,779 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:29:35,779 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:29:35,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:29:35,780 INFO L82 PathProgramCache]: Analyzing trace with hash 96926796, now seen corresponding path program 1 times [2021-05-02 22:29:35,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:29:35,780 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692195518] [2021-05-02 22:29:35,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:29:35,796 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:29:35,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1269392846] [2021-05-02 22:29:35,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:29:35,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:29:35,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 22:29:35,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:29:35,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:29:35,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:29:35,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:29:35,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:29:35,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:29:35,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:29:35,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:29:35,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:29:35,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:29:35,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:29:35,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:29:35,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:29:35,976 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 22:29:35,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:29:35,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692195518] [2021-05-02 22:29:35,977 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:29:35,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269392846] [2021-05-02 22:29:35,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269392846] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:29:35,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:29:35,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 22:29:35,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236693807] [2021-05-02 22:29:35,977 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 22:29:35,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:29:35,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 22:29:35,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-02 22:29:35,978 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 22:29:36,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:29:36,054 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2021-05-02 22:29:36,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 22:29:36,055 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 37 [2021-05-02 22:29:36,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:29:36,056 INFO L225 Difference]: With dead ends: 53 [2021-05-02 22:29:36,056 INFO L226 Difference]: Without dead ends: 49 [2021-05-02 22:29:36,056 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 71.9ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-02 22:29:36,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-05-02 22:29:36,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-05-02 22:29:36,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 32 states have (on average 1.125) internal successors, (36), 34 states have internal predecessors, (36), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 22:29:36,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2021-05-02 22:29:36,059 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 37 [2021-05-02 22:29:36,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:29:36,060 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2021-05-02 22:29:36,060 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 22:29:36,060 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2021-05-02 22:29:36,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-02 22:29:36,060 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:29:36,061 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:29:36,277 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:29:36,277 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:29:36,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:29:36,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1133104769, now seen corresponding path program 3 times [2021-05-02 22:29:36,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:29:36,278 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792426668] [2021-05-02 22:29:36,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:29:36,288 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:29:36,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [51275326] [2021-05-02 22:29:36,288 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