/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/ps4-ll_unwindbound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 22:21:19,258 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 22:21:19,261 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 22:21:19,290 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 22:21:19,290 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 22:21:19,294 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 22:21:19,296 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 22:21:19,301 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 22:21:19,303 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 22:21:19,306 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 22:21:19,307 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 22:21:19,308 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 22:21:19,308 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 22:21:19,310 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 22:21:19,311 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 22:21:19,312 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 22:21:19,313 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 22:21:19,314 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 22:21:19,315 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 22:21:19,319 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 22:21:19,320 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 22:21:19,321 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 22:21:19,322 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 22:21:19,323 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 22:21:19,328 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-05-02 22:21:19,328 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-05-02 22:21:19,328 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-05-02 22:21:19,329 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-05-02 22:21:19,330 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-05-02 22:21:19,330 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-05-02 22:21:19,330 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-02 22:21:19,331 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-02 22:21:19,332 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-02 22:21:19,332 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-02 22:21:19,333 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-02 22:21:19,333 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-02 22:21:19,333 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-02 22:21:19,333 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-02 22:21:19,334 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 22:21:19,334 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 22:21:19,334 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 22:21:19,337 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 22:21:19,349 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 22:21:19,349 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 22:21:19,351 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 22:21:19,351 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 22:21:19,351 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 22:21:19,352 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 22:21:19,352 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 22:21:19,352 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 22:21:19,352 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 22:21:19,352 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 22:21:19,352 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 22:21:19,353 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 22:21:19,353 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 22:21:19,353 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 22:21:19,353 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 22:21:19,353 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 22:21:19,353 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 22:21:19,353 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 22:21:19,353 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 22:21:19,353 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 22:21:19,353 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 22:21:19,354 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 22:21:19,354 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 22:21:19,624 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 22:21:19,640 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 22:21:19,642 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 22:21:19,642 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 22:21:19,643 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 22:21:19,644 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_unwindbound5.c [2021-05-02 22:21:19,683 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89bc4a354/106900db086a4124bcd8ef5ea545e76d/FLAG652f549d3 [2021-05-02 22:21:19,983 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 22:21:19,983 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_unwindbound5.c [2021-05-02 22:21:19,988 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89bc4a354/106900db086a4124bcd8ef5ea545e76d/FLAG652f549d3 [2021-05-02 22:21:20,410 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89bc4a354/106900db086a4124bcd8ef5ea545e76d [2021-05-02 22:21:20,412 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 22:21:20,413 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 22:21:20,417 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 22:21:20,417 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 22:21:20,419 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 22:21:20,420 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 10:21:20" (1/1) ... [2021-05-02 22:21:20,421 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@161e7e79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:21:20, skipping insertion in model container [2021-05-02 22:21:20,421 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 10:21:20" (1/1) ... [2021-05-02 22:21:20,426 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 22:21:20,436 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 22:21:20,532 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/ps4-ll_unwindbound5.c[458,471] [2021-05-02 22:21:20,540 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 22:21:20,545 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 22:21:20,556 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/ps4-ll_unwindbound5.c[458,471] [2021-05-02 22:21:20,562 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 22:21:20,573 INFO L208 MainTranslator]: Completed translation [2021-05-02 22:21:20,574 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:21:20 WrapperNode [2021-05-02 22:21:20,574 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 22:21:20,576 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 22:21:20,576 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 22:21:20,576 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 22:21:20,611 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:21:20" (1/1) ... [2021-05-02 22:21:20,611 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:21:20" (1/1) ... [2021-05-02 22:21:20,615 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:21:20" (1/1) ... [2021-05-02 22:21:20,615 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:21:20" (1/1) ... [2021-05-02 22:21:20,618 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:21:20" (1/1) ... [2021-05-02 22:21:20,623 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:21:20" (1/1) ... [2021-05-02 22:21:20,624 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:21:20" (1/1) ... [2021-05-02 22:21:20,625 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 22:21:20,626 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 22:21:20,626 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 22:21:20,626 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 22:21:20,627 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:21:20" (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 22:21:20,691 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 22:21:20,691 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 22:21:20,692 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 22:21:20,692 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 22:21:20,692 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 22:21:20,692 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 22:21:20,692 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 22:21:20,692 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 22:21:20,693 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 22:21:20,693 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 22:21:20,693 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2021-05-02 22:21:20,693 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 22:21:20,693 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 22:21:20,694 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 22:21:20,694 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 22:21:20,694 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 22:21:20,694 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 22:21:20,694 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 22:21:20,695 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 22:21:20,695 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 22:21:20,908 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 22:21:20,908 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 22:21:20,909 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 10:21:20 BoogieIcfgContainer [2021-05-02 22:21:20,909 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 22:21:20,910 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 22:21:20,910 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 22:21:20,911 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 22:21:20,912 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 10:21:20" (1/1) ... [2021-05-02 22:21:20,929 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 10:21:20 BasicIcfg [2021-05-02 22:21:20,929 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 22:21:20,949 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 22:21:20,949 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 22:21:20,951 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 22:21:20,951 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 10:21:20" (1/4) ... [2021-05-02 22:21:20,952 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6965310f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 10:21:20, skipping insertion in model container [2021-05-02 22:21:20,952 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:21:20" (2/4) ... [2021-05-02 22:21:20,952 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6965310f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 10:21:20, skipping insertion in model container [2021-05-02 22:21:20,952 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 10:21:20" (3/4) ... [2021-05-02 22:21:20,952 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6965310f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 10:21:20, skipping insertion in model container [2021-05-02 22:21:20,952 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 10:21:20" (4/4) ... [2021-05-02 22:21:20,953 INFO L111 eAbstractionObserver]: Analyzing ICFG ps4-ll_unwindbound5.cJordan [2021-05-02 22:21:20,956 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 22:21:20,959 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 22:21:20,969 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 22:21:20,981 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 22:21:20,981 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 22:21:20,981 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 22:21:20,981 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 22:21:20,982 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 22:21:20,982 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 22:21:20,982 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 22:21:20,982 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 22:21:20,989 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 22:21:20,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 22:21:20,995 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:21:20,995 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:21:20,996 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:21:20,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:21:20,999 INFO L82 PathProgramCache]: Analyzing trace with hash 1984627219, now seen corresponding path program 1 times [2021-05-02 22:21:21,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:21:21,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56418885] [2021-05-02 22:21:21,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:21:21,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:21:21,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 22:21:21,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:21:21,161 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 22:21:21,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:21:21,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56418885] [2021-05-02 22:21:21,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56418885] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 22:21:21,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 22:21:21,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 22:21:21,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892977390] [2021-05-02 22:21:21,166 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 22:21:21,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:21:21,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 22:21:21,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 22:21:21,175 INFO L87 Difference]: Start difference. First operand has 23 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 22:21:21,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:21:21,218 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2021-05-02 22:21:21,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 22:21:21,219 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-02 22:21:21,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:21:21,223 INFO L225 Difference]: With dead ends: 24 [2021-05-02 22:21:21,223 INFO L226 Difference]: Without dead ends: 19 [2021-05-02 22:21:21,224 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 22:21:21,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-05-02 22:21:21,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2021-05-02 22:21:21,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 22:21:21,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2021-05-02 22:21:21,244 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 11 [2021-05-02 22:21:21,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:21:21,244 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2021-05-02 22:21:21,244 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 22:21:21,245 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2021-05-02 22:21:21,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 22:21:21,245 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:21:21,245 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:21:21,245 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 22:21:21,245 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:21:21,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:21:21,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1423332195, now seen corresponding path program 1 times [2021-05-02 22:21:21,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:21:21,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307628725] [2021-05-02 22:21:21,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:21:21,257 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:21:21,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [232405189] [2021-05-02 22:21:21,258 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 22:21:21,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:21:21,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 22:21:21,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:21:21,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:21,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:21,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:21,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:21,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:21,385 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 22:21:21,385 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:21:21,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307628725] [2021-05-02 22:21:21,385 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:21:21,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232405189] [2021-05-02 22:21:21,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232405189] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 22:21:21,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 22:21:21,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 22:21:21,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957963189] [2021-05-02 22:21:21,387 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 22:21:21,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:21:21,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 22:21:21,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 22:21:21,388 INFO L87 Difference]: Start difference. First operand 18 states and 21 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) [2021-05-02 22:21:21,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:21:21,395 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2021-05-02 22:21:21,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 22:21:21,396 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 [2021-05-02 22:21:21,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:21:21,396 INFO L225 Difference]: With dead ends: 20 [2021-05-02 22:21:21,396 INFO L226 Difference]: Without dead ends: 20 [2021-05-02 22:21:21,397 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.2ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 22:21:21,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-05-02 22:21:21,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-05-02 22:21:21,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 22:21:21,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2021-05-02 22:21:21,400 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 12 [2021-05-02 22:21:21,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:21:21,400 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2021-05-02 22:21:21,400 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) [2021-05-02 22:21:21,400 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2021-05-02 22:21:21,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 22:21:21,400 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:21:21,401 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:21:21,618 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 22:21:21,619 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:21:21,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:21:21,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1424404671, now seen corresponding path program 1 times [2021-05-02 22:21:21,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:21:21,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513253526] [2021-05-02 22:21:21,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:21:21,628 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:21:21,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2032857737] [2021-05-02 22:21:21,628 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 22:21:21,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:21:21,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-02 22:21:21,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:21:21,722 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 22:21:21,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:21:21,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513253526] [2021-05-02 22:21:21,722 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:21:21,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032857737] [2021-05-02 22:21:21,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032857737] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 22:21:21,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 22:21:21,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 22:21:21,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946943573] [2021-05-02 22:21:21,723 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 22:21:21,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:21:21,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 22:21:21,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 22:21:21,724 INFO L87 Difference]: Start difference. First operand 20 states and 23 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) [2021-05-02 22:21:21,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:21:21,757 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2021-05-02 22:21:21,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 22:21:21,758 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 [2021-05-02 22:21:21,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:21:21,758 INFO L225 Difference]: With dead ends: 28 [2021-05-02 22:21:21,758 INFO L226 Difference]: Without dead ends: 26 [2021-05-02 22:21:21,758 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.2ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 22:21:21,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-02 22:21:21,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-05-02 22:21:21,762 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 22:21:21,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2021-05-02 22:21:21,762 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 12 [2021-05-02 22:21:21,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:21:21,763 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2021-05-02 22:21:21,763 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) [2021-05-02 22:21:21,763 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2021-05-02 22:21:21,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-02 22:21:21,763 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:21:21,763 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:21:21,976 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:21:21,977 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:21:21,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:21:21,977 INFO L82 PathProgramCache]: Analyzing trace with hash -381498108, now seen corresponding path program 1 times [2021-05-02 22:21:21,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:21:21,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565048827] [2021-05-02 22:21:21,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:21:21,987 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:21:21,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1636394377] [2021-05-02 22:21:21,988 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 22:21:22,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:21:22,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 22:21:22,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:21:22,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:22,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:22,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:22,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:22,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:22,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:22,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:22,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:22,087 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 22:21:22,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:21:22,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565048827] [2021-05-02 22:21:22,088 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:21:22,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636394377] [2021-05-02 22:21:22,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636394377] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:21:22,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:21:22,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 22:21:22,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021723049] [2021-05-02 22:21:22,088 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 22:21:22,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:21:22,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 22:21:22,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 22:21:22,089 INFO L87 Difference]: Start difference. First operand 26 states and 29 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) [2021-05-02 22:21:22,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:21:22,109 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2021-05-02 22:21:22,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 22:21:22,109 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 [2021-05-02 22:21:22,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:21:22,110 INFO L225 Difference]: With dead ends: 28 [2021-05-02 22:21:22,110 INFO L226 Difference]: Without dead ends: 28 [2021-05-02 22:21:22,110 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 11.6ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 22:21:22,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-05-02 22:21:22,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-05-02 22:21:22,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 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 22:21:22,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2021-05-02 22:21:22,113 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 20 [2021-05-02 22:21:22,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:21:22,113 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2021-05-02 22:21:22,114 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) [2021-05-02 22:21:22,114 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2021-05-02 22:21:22,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-02 22:21:22,114 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:21:22,114 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:21:22,329 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:21:22,330 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:21:22,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:21:22,330 INFO L82 PathProgramCache]: Analyzing trace with hash -380425632, now seen corresponding path program 1 times [2021-05-02 22:21:22,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:21:22,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723287549] [2021-05-02 22:21:22,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:21:22,337 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:21:22,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1531210678] [2021-05-02 22:21:22,338 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 22:21:22,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:21:22,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 22:21:22,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:21:22,462 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:21:22,463 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:21:22,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723287549] [2021-05-02 22:21:22,463 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:21:22,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531210678] [2021-05-02 22:21:22,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531210678] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:21:22,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:21:22,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 22:21:22,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98869397] [2021-05-02 22:21:22,463 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 22:21:22,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:21:22,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 22:21:22,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 22:21:22,464 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 22:21:27,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:21:27,498 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2021-05-02 22:21:27,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 22:21:27,498 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (4), 2 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 [2021-05-02 22:21:27,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:21:27,499 INFO L225 Difference]: With dead ends: 36 [2021-05-02 22:21:27,499 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 22:21:27,499 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 37.0ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-02 22:21:27,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 22:21:27,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-02 22:21:27,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 24 states have internal predecessors, (26), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 22:21:27,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2021-05-02 22:21:27,503 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 20 [2021-05-02 22:21:27,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:21:27,503 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2021-05-02 22:21:27,503 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 22:21:27,503 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2021-05-02 22:21:27,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-02 22:21:27,503 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:21:27,504 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:21:27,713 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:21:27,713 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:21:27,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:21:27,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1647871298, now seen corresponding path program 1 times [2021-05-02 22:21:27,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:21:27,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771716106] [2021-05-02 22:21:27,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:21:27,720 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:21:27,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1078569172] [2021-05-02 22:21:27,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:21:27,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:21:27,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 22:21:27,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:21:27,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:27,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:27,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:27,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:27,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:27,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:27,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:27,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:27,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:27,905 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 22:21:27,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:21:27,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771716106] [2021-05-02 22:21:27,905 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:21:27,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078569172] [2021-05-02 22:21:27,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078569172] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:21:27,906 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:21:27,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 22:21:27,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107402245] [2021-05-02 22:21:27,906 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 22:21:27,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:21:27,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 22:21:27,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 22:21:27,907 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 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) [2021-05-02 22:21:28,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:21:28,005 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2021-05-02 22:21:28,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 22:21:28,006 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 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 26 [2021-05-02 22:21:28,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:21:28,006 INFO L225 Difference]: With dead ends: 39 [2021-05-02 22:21:28,007 INFO L226 Difference]: Without dead ends: 34 [2021-05-02 22:21:28,007 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 61.3ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-02 22:21:28,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-02 22:21:28,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-05-02 22:21:28,009 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 22:21:28,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2021-05-02 22:21:28,010 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 26 [2021-05-02 22:21:28,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:21:28,010 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2021-05-02 22:21:28,010 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 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) [2021-05-02 22:21:28,010 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2021-05-02 22:21:28,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 22:21:28,011 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:21:28,011 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:21:28,225 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 22:21:28,225 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:21:28,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:21:28,225 INFO L82 PathProgramCache]: Analyzing trace with hash -382724699, now seen corresponding path program 2 times [2021-05-02 22:21:28,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:21:28,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404092235] [2021-05-02 22:21:28,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:21:28,233 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:21:28,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1278086937] [2021-05-02 22:21:28,233 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 22:21:28,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 22:21:28,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:21:28,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 22:21:28,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:21:28,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:28,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:28,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:28,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:28,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:28,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:28,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:28,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:28,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:28,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:28,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:28,379 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 22:21:28,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:21:28,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404092235] [2021-05-02 22:21:28,380 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:21:28,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278086937] [2021-05-02 22:21:28,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278086937] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:21:28,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:21:28,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 22:21:28,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143067393] [2021-05-02 22:21:28,381 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 22:21:28,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:21:28,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 22:21:28,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 22:21:28,381 INFO L87 Difference]: Start difference. First operand 34 states and 37 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) [2021-05-02 22:21:28,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:21:28,425 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2021-05-02 22:21:28,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 22:21:28,425 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 [2021-05-02 22:21:28,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:21:28,427 INFO L225 Difference]: With dead ends: 36 [2021-05-02 22:21:28,427 INFO L226 Difference]: Without dead ends: 36 [2021-05-02 22:21:28,427 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 22.5ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-02 22:21:28,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-02 22:21:28,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-05-02 22:21:28,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.125) internal successors, (27), 25 states have internal predecessors, (27), 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 22:21:28,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2021-05-02 22:21:28,442 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 28 [2021-05-02 22:21:28,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:21:28,442 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2021-05-02 22:21:28,442 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) [2021-05-02 22:21:28,442 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2021-05-02 22:21:28,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 22:21:28,443 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:21:28,443 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:21:28,656 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:21:28,657 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:21:28,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:21:28,657 INFO L82 PathProgramCache]: Analyzing trace with hash -381652223, now seen corresponding path program 2 times [2021-05-02 22:21:28,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:21:28,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850645819] [2021-05-02 22:21:28,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:21:28,664 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:21:28,664 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2023994554] [2021-05-02 22:21:28,664 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 [2021-05-02 22:21:28,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 22:21:28,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:21:28,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 22:21:28,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:21:28,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:28,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:28,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:28,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:28,849 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 22:21:28,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:21:28,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850645819] [2021-05-02 22:21:28,850 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:21:28,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023994554] [2021-05-02 22:21:28,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023994554] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:21:28,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:21:28,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 22:21:28,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901869493] [2021-05-02 22:21:28,850 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 22:21:28,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:21:28,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 22:21:28,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 22:21:28,851 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 8 states have internal predecessors, (17), 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) [2021-05-02 22:21:30,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:21:30,970 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2021-05-02 22:21:30,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 22:21:30,971 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 8 states have internal predecessors, (17), 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 [2021-05-02 22:21:30,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:21:30,971 INFO L225 Difference]: With dead ends: 44 [2021-05-02 22:21:30,971 INFO L226 Difference]: Without dead ends: 43 [2021-05-02 22:21:30,972 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 89.5ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-02 22:21:30,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-02 22:21:30,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-05-02 22:21:30,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 30 states have internal predecessors, (32), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 22:21:30,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2021-05-02 22:21:30,975 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 28 [2021-05-02 22:21:30,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:21:30,976 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2021-05-02 22:21:30,976 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 8 states have internal predecessors, (17), 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) [2021-05-02 22:21:30,976 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2021-05-02 22:21:30,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 22:21:30,976 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:21:30,976 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:21:31,190 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:21:31,190 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:21:31,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:21:31,191 INFO L82 PathProgramCache]: Analyzing trace with hash 31133987, now seen corresponding path program 2 times [2021-05-02 22:21:31,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:21:31,191 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557899947] [2021-05-02 22:21:31,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:21:31,197 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:21:31,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2032681090] [2021-05-02 22:21:31,197 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:21:31,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 22:21:31,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:21:31,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-02 22:21:31,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:21:31,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:31,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:31,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:31,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:31,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:31,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:31,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:31,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:31,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:31,372 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-02 22:21:31,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:21:31,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557899947] [2021-05-02 22:21:31,372 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:21:31,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032681090] [2021-05-02 22:21:31,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032681090] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:21:31,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:21:31,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 22:21:31,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806087712] [2021-05-02 22:21:31,373 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 22:21:31,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:21:31,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 22:21:31,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-05-02 22:21:31,373 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 22:21:31,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:21:31,467 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2021-05-02 22:21:31,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 22:21:31,468 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 34 [2021-05-02 22:21:31,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:21:31,469 INFO L225 Difference]: With dead ends: 47 [2021-05-02 22:21:31,469 INFO L226 Difference]: Without dead ends: 42 [2021-05-02 22:21:31,469 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 83.5ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-02 22:21:31,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-02 22:21:31,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-05-02 22:21:31,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 29 states have internal predecessors, (31), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 22:21:31,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2021-05-02 22:21:31,472 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 34 [2021-05-02 22:21:31,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:21:31,472 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2021-05-02 22:21:31,472 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 22:21:31,472 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2021-05-02 22:21:31,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 22:21:31,473 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:21:31,473 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:21:31,690 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-02 22:21:31,690 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:21:31,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:21:31,691 INFO L82 PathProgramCache]: Analyzing trace with hash 710880582, now seen corresponding path program 3 times [2021-05-02 22:21:31,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:21:31,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213647487] [2021-05-02 22:21:31,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:21:31,696 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:21:31,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [570808767] [2021-05-02 22:21:31,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:21:31,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 22:21:31,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:21:31,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 22:21:31,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:21:31,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:31,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:31,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:31,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:31,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:31,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:31,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:31,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:31,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:31,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:31,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:31,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:31,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:31,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:31,810 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:21:31,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:21:31,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213647487] [2021-05-02 22:21:31,810 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:21:31,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570808767] [2021-05-02 22:21:31,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570808767] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:21:31,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:21:31,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 22:21:31,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234014657] [2021-05-02 22:21:31,811 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 22:21:31,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:21:31,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 22:21:31,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 22:21:31,812 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 22:21:31,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:21:31,862 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2021-05-02 22:21:31,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 22:21:31,863 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 36 [2021-05-02 22:21:31,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:21:31,863 INFO L225 Difference]: With dead ends: 44 [2021-05-02 22:21:31,863 INFO L226 Difference]: Without dead ends: 44 [2021-05-02 22:21:31,864 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 34.1ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-02 22:21:31,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-02 22:21:31,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-05-02 22:21:31,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 30 states have (on average 1.1) internal successors, (33), 31 states have internal predecessors, (33), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 22:21:31,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2021-05-02 22:21:31,866 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 36 [2021-05-02 22:21:31,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:21:31,866 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2021-05-02 22:21:31,866 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 22:21:31,866 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2021-05-02 22:21:31,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 22:21:31,867 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:21:31,867 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:21:32,070 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:21:32,070 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:21:32,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:21:32,071 INFO L82 PathProgramCache]: Analyzing trace with hash 711953058, now seen corresponding path program 3 times [2021-05-02 22:21:32,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:21:32,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395732139] [2021-05-02 22:21:32,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:21:32,082 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:21:32,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1985466993] [2021-05-02 22:21:32,082 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:21:32,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 22:21:32,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:21:32,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 22:21:32,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:21:32,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:32,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:32,208 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 22:21:32,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:21:32,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395732139] [2021-05-02 22:21:32,209 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:21:32,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985466993] [2021-05-02 22:21:32,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985466993] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:21:32,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:21:32,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 22:21:32,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973952583] [2021-05-02 22:21:32,210 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 22:21:32,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:21:32,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 22:21:32,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-02 22:21:32,211 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand has 7 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) [2021-05-02 22:21:32,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:21:32,258 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2021-05-02 22:21:32,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 22:21:32,258 INFO L78 Accepts]: Start accepts. Automaton has has 7 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) Word has length 36 [2021-05-02 22:21:32,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:21:32,259 INFO L225 Difference]: With dead ends: 48 [2021-05-02 22:21:32,259 INFO L226 Difference]: Without dead ends: 45 [2021-05-02 22:21:32,259 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 51.0ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-02 22:21:32,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-02 22:21:32,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-05-02 22:21:32,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 32 states have (on average 1.0625) internal successors, (34), 32 states have internal predecessors, (34), 7 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 22:21:32,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2021-05-02 22:21:32,261 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 36 [2021-05-02 22:21:32,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:21:32,262 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2021-05-02 22:21:32,262 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 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) [2021-05-02 22:21:32,262 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2021-05-02 22:21:32,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-02 22:21:32,262 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:21:32,263 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:21:32,472 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:21:32,473 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:21:32,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:21:32,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1474833412, now seen corresponding path program 3 times [2021-05-02 22:21:32,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:21:32,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014456933] [2021-05-02 22:21:32,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:21:32,478 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:21:32,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [499468277] [2021-05-02 22:21:32,478 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:21:32,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 22:21:32,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:21:32,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 22:21:32,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:21:32,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:32,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:32,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:32,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:32,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:32,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:32,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:32,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:32,875 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 22:21:32,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:21:32,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014456933] [2021-05-02 22:21:32,875 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:21:32,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499468277] [2021-05-02 22:21:32,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499468277] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:21:32,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:21:32,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 22:21:32,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715462332] [2021-05-02 22:21:32,876 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 22:21:32,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:21:32,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 22:21:32,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-05-02 22:21:32,876 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 22:21:32,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:21:32,935 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2021-05-02 22:21:32,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 22:21:32,936 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 42 [2021-05-02 22:21:32,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:21:32,936 INFO L225 Difference]: With dead ends: 50 [2021-05-02 22:21:32,936 INFO L226 Difference]: Without dead ends: 47 [2021-05-02 22:21:32,937 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 52.3ms TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-02 22:21:32,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-02 22:21:32,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-05-02 22:21:32,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 8 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 22:21:32,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2021-05-02 22:21:32,939 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 42 [2021-05-02 22:21:32,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:21:32,939 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2021-05-02 22:21:32,939 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 22:21:32,940 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2021-05-02 22:21:32,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-02 22:21:32,940 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:21:32,940 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:21:33,144 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 22:21:33,144 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:21:33,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:21:33,144 INFO L82 PathProgramCache]: Analyzing trace with hash 831591399, now seen corresponding path program 4 times [2021-05-02 22:21:33,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:21:33,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689659862] [2021-05-02 22:21:33,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:21:33,149 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:21:33,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [851429276] [2021-05-02 22:21:33,149 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:21:33,200 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 22:21:33,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:21:33,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-02 22:21:33,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:21:33,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:33,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:33,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:33,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:33,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:33,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:33,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:33,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:33,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:33,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:33,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:33,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:33,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:33,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:33,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:33,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:33,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:33,295 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:21:33,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:21:33,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689659862] [2021-05-02 22:21:33,295 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:21:33,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851429276] [2021-05-02 22:21:33,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851429276] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:21:33,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:21:33,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 22:21:33,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194449156] [2021-05-02 22:21:33,296 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 22:21:33,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:21:33,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 22:21:33,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 22:21:33,297 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 7 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 22:21:33,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:21:33,499 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2021-05-02 22:21:33,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 22:21:33,500 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 7 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 44 [2021-05-02 22:21:33,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:21:33,500 INFO L225 Difference]: With dead ends: 53 [2021-05-02 22:21:33,501 INFO L226 Difference]: Without dead ends: 53 [2021-05-02 22:21:33,501 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 40.2ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-05-02 22:21:33,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-05-02 22:21:33,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-05-02 22:21:33,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 38 states have internal predecessors, (40), 8 states have call successors, (8), 8 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 22:21:33,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2021-05-02 22:21:33,503 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 44 [2021-05-02 22:21:33,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:21:33,503 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2021-05-02 22:21:33,503 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 7 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 22:21:33,503 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2021-05-02 22:21:33,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-02 22:21:33,504 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:21:33,504 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:21:33,715 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-02 22:21:33,715 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:21:33,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:21:33,716 INFO L82 PathProgramCache]: Analyzing trace with hash -1805593115, now seen corresponding path program 4 times [2021-05-02 22:21:33,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:21:33,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664456292] [2021-05-02 22:21:33,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:21:33,720 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:21:33,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1854095637] [2021-05-02 22:21:33,720 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:21:33,872 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 22:21:33,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:21:33,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-02 22:21:33,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:21:33,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:34,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:34,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:34,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:34,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:34,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:34,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:34,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:34,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:34,063 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 9 proven. 53 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 22:21:34,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:21:34,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664456292] [2021-05-02 22:21:34,063 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:21:34,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854095637] [2021-05-02 22:21:34,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854095637] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:21:34,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:21:34,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 22:21:34,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426624857] [2021-05-02 22:21:34,064 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 22:21:34,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:21:34,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 22:21:34,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-05-02 22:21:34,065 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 22:21:34,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:21:34,183 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2021-05-02 22:21:34,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 22:21:34,184 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 50 [2021-05-02 22:21:34,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:21:34,184 INFO L225 Difference]: With dead ends: 58 [2021-05-02 22:21:34,185 INFO L226 Difference]: Without dead ends: 55 [2021-05-02 22:21:34,185 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 90.8ms TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-05-02 22:21:34,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-02 22:21:34,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-05-02 22:21:34,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 39 states have internal predecessors, (41), 9 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 22:21:34,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2021-05-02 22:21:34,192 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 50 [2021-05-02 22:21:34,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:21:34,193 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2021-05-02 22:21:34,193 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 22:21:34,193 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2021-05-02 22:21:34,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-02 22:21:34,195 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:21:34,195 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:21:34,401 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-02 22:21:34,401 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:21:34,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:21:34,401 INFO L82 PathProgramCache]: Analyzing trace with hash 847694216, now seen corresponding path program 5 times [2021-05-02 22:21:34,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:21:34,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279329664] [2021-05-02 22:21:34,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:21:34,409 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:21:34,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [539714513] [2021-05-02 22:21:34,409 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:21:34,460 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-02 22:21:34,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-05-02 22:21:34,460 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 22:21:34,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 22:21:34,524 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 22:21:34,567 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-02 22:21:34,567 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-02 22:21:34,767 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:21:34,793 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 10:21:34 BasicIcfg [2021-05-02 22:21:34,793 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 22:21:34,793 INFO L168 Benchmark]: Toolchain (without parser) took 14380.04 ms. Allocated memory was 211.8 MB in the beginning and 254.8 MB in the end (delta: 43.0 MB). Free memory was 178.3 MB in the beginning and 208.0 MB in the end (delta: -29.7 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-05-02 22:21:34,793 INFO L168 Benchmark]: CDTParser took 0.09 ms. Allocated memory is still 211.8 MB. Free memory is still 194.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 22:21:34,793 INFO L168 Benchmark]: CACSL2BoogieTranslator took 157.00 ms. Allocated memory is still 211.8 MB. Free memory was 178.1 MB in the beginning and 168.3 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-02 22:21:34,793 INFO L168 Benchmark]: Boogie Preprocessor took 49.63 ms. Allocated memory is still 211.8 MB. Free memory was 168.3 MB in the beginning and 195.8 MB in the end (delta: -27.5 MB). Peak memory consumption was 4.3 MB. Max. memory is 8.0 GB. [2021-05-02 22:21:34,793 INFO L168 Benchmark]: RCFGBuilder took 283.82 ms. Allocated memory is still 211.8 MB. Free memory was 195.8 MB in the beginning and 181.1 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-02 22:21:34,793 INFO L168 Benchmark]: IcfgTransformer took 19.02 ms. Allocated memory is still 211.8 MB. Free memory was 181.1 MB in the beginning and 180.1 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 22:21:34,793 INFO L168 Benchmark]: TraceAbstraction took 13843.89 ms. Allocated memory was 211.8 MB in the beginning and 254.8 MB in the end (delta: 43.0 MB). Free memory was 179.6 MB in the beginning and 208.0 MB in the end (delta: -28.5 MB). Peak memory consumption was 15.6 MB. Max. memory is 8.0 GB. [2021-05-02 22:21:34,794 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09 ms. Allocated memory is still 211.8 MB. Free memory is still 194.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 157.00 ms. Allocated memory is still 211.8 MB. Free memory was 178.1 MB in the beginning and 168.3 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 49.63 ms. Allocated memory is still 211.8 MB. Free memory was 168.3 MB in the beginning and 195.8 MB in the end (delta: -27.5 MB). Peak memory consumption was 4.3 MB. Max. memory is 8.0 GB. * RCFGBuilder took 283.82 ms. Allocated memory is still 211.8 MB. Free memory was 195.8 MB in the beginning and 181.1 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 19.02 ms. Allocated memory is still 211.8 MB. Free memory was 181.1 MB in the beginning and 180.1 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 13843.89 ms. Allocated memory was 211.8 MB in the beginning and 254.8 MB in the end (delta: 43.0 MB). Free memory was 179.6 MB in the beginning and 208.0 MB in the end (delta: -28.5 MB). Peak memory consumption was 15.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L17] int counter = 0; VAL [\old(counter)=15, counter=0] [L19] short k; [L20] long long y, x, c; [L21] k = __VERIFIER_nondet_short() [L23] y = 0 [L24] x = 0 [L25] c = 0 VAL [\old(counter)=0, c=0, counter=0, k=6, x=0, y=0] [L27] EXPR counter++ VAL [\old(counter)=0, c=0, counter=1, counter++=0, k=6, x=0, y=0] [L27] COND TRUE counter++<5 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(counter)=0, c=0, counter=1, k=6, x=0, y=0] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [\old(counter)=0, c=1, counter=1, k=6, x=1, y=1] [L27] EXPR counter++ VAL [\old(counter)=0, c=1, counter=2, counter++=1, k=6, x=1, y=1] [L27] COND TRUE counter++<5 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(counter)=0, c=1, counter=2, k=6, x=1, y=1] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [\old(counter)=0, c=2, counter=2, k=6, x=9, y=2] [L27] EXPR counter++ VAL [\old(counter)=0, c=2, counter=3, counter++=2, k=6, x=9, y=2] [L27] COND TRUE counter++<5 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, \old(counter)=0, counter=3] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(counter)=0, c=2, counter=3, k=6, x=9, y=2] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [\old(counter)=0, c=3, counter=3, k=6, x=36, y=3] [L27] EXPR counter++ VAL [\old(counter)=0, c=3, counter=4, counter++=3, k=6, x=36, y=3] [L27] COND TRUE counter++<5 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(counter)=0, c=3, counter=4, k=6, x=36, y=3] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [\old(counter)=0, c=4, counter=4, k=6, x=100, y=4] [L27] EXPR counter++ VAL [\old(counter)=0, c=4, counter=5, counter++=4, k=6, x=100, y=4] [L27] COND TRUE counter++<5 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(counter)=0, c=4, counter=5, k=6, x=100, y=4] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [\old(counter)=0, c=5, counter=5, k=6, x=225, y=5] [L27] EXPR counter++ VAL [\old(counter)=0, c=5, counter=6, counter++=5, k=6, x=225, y=5] [L27] COND FALSE !(counter++<5) [L37] CALL __VERIFIER_assert(k*y - (y*y) == 0) VAL [\old(cond)=0, \old(counter)=0, counter=6] [L10] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=6] [L12] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=6] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 13787.9ms, OverallIterations: 15, TraceHistogramMax: 6, EmptinessCheckTime: 15.4ms, AutomataDifference: 8012.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 5.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 297 SDtfs, 95 SDslu, 1158 SDs, 0 SdLazy, 726 SolverSat, 41 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 7534.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 407 GetRequests, 299 SyntacticMatches, 4 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 634.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=55occurred in iteration=14, InterpolantAutomatonStates: 112, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 64.3ms AutomataMinimizationTime, 14 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 92.4ms SsaConstructionTime, 652.5ms SatisfiabilityAnalysisTime, 1451.9ms InterpolantComputationTime, 451 NumberOfCodeBlocks, 435 NumberOfCodeBlocksAsserted, 32 NumberOfCheckSat, 385 ConstructedInterpolants, 0 QuantifiedInterpolants, 1442 SizeOfPredicates, 37 NumberOfNonLiveVariables, 1909 ConjunctsInSsa, 214 ConjunctsInUnsatCore, 14 InterpolantComputations, 3 PerfectInterpolantSequences, 149/370 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...