/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/cohendiv-ll_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 19:40:35,364 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 19:40:35,366 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 19:40:35,419 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 19:40:35,420 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 19:40:35,423 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 19:40:35,425 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 19:40:35,429 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 19:40:35,431 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 19:40:35,435 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 19:40:35,435 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 19:40:35,437 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 19:40:35,437 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 19:40:35,439 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 19:40:35,440 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 19:40:35,441 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 19:40:35,443 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 19:40:35,444 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 19:40:35,446 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 19:40:35,470 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 19:40:35,471 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 19:40:35,472 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 19:40:35,473 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 19:40:35,475 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 19:40:35,480 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-05-02 19:40:35,480 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-05-02 19:40:35,481 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-05-02 19:40:35,482 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-05-02 19:40:35,482 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-05-02 19:40:35,484 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-05-02 19:40:35,484 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-02 19:40:35,485 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-02 19:40:35,486 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-02 19:40:35,486 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-02 19:40:35,487 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-02 19:40:35,487 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-02 19:40:35,487 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-02 19:40:35,488 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-02 19:40:35,488 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 19:40:35,488 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 19:40:35,489 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 19:40:35,492 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 19:40:35,505 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 19:40:35,505 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 19:40:35,507 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 19:40:35,508 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 19:40:35,508 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 19:40:35,508 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 19:40:35,508 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 19:40:35,508 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 19:40:35,508 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 19:40:35,508 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 19:40:35,509 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 19:40:35,509 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 19:40:35,509 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 19:40:35,509 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 19:40:35,509 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 19:40:35,509 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 19:40:35,510 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 19:40:35,510 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 19:40:35,510 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 19:40:35,510 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 19:40:35,510 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 19:40:35,511 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 19:40:35,511 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 19:40:35,786 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 19:40:35,812 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 19:40:35,814 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 19:40:35,815 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 19:40:35,815 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 19:40:35,816 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_unwindbound100.c [2021-05-02 19:40:35,869 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/066350eca/8b034e4dd6ed4b2da953ef0425c9ba2e/FLAG3a5541777 [2021-05-02 19:40:36,232 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 19:40:36,232 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_unwindbound100.c [2021-05-02 19:40:36,237 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/066350eca/8b034e4dd6ed4b2da953ef0425c9ba2e/FLAG3a5541777 [2021-05-02 19:40:36,660 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/066350eca/8b034e4dd6ed4b2da953ef0425c9ba2e [2021-05-02 19:40:36,662 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 19:40:36,664 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 19:40:36,669 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 19:40:36,669 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 19:40:36,673 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 19:40:36,673 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 07:40:36" (1/1) ... [2021-05-02 19:40:36,674 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d5d28e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:40:36, skipping insertion in model container [2021-05-02 19:40:36,674 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 07:40:36" (1/1) ... [2021-05-02 19:40:36,680 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 19:40:36,693 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 19:40:36,783 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/cohendiv-ll_unwindbound100.c[576,589] [2021-05-02 19:40:36,792 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 19:40:36,797 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 19:40:36,847 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/cohendiv-ll_unwindbound100.c[576,589] [2021-05-02 19:40:36,855 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 19:40:36,866 INFO L208 MainTranslator]: Completed translation [2021-05-02 19:40:36,867 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:40:36 WrapperNode [2021-05-02 19:40:36,867 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 19:40:36,868 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 19:40:36,868 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 19:40:36,868 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 19:40:36,877 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:40:36" (1/1) ... [2021-05-02 19:40:36,877 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:40:36" (1/1) ... [2021-05-02 19:40:36,882 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:40:36" (1/1) ... [2021-05-02 19:40:36,882 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:40:36" (1/1) ... [2021-05-02 19:40:36,886 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:40:36" (1/1) ... [2021-05-02 19:40:36,890 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:40:36" (1/1) ... [2021-05-02 19:40:36,890 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:40:36" (1/1) ... [2021-05-02 19:40:36,891 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 19:40:36,892 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 19:40:36,892 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 19:40:36,892 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 19:40:36,893 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:40:36" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 19:40:36,941 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 19:40:36,941 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 19:40:36,941 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 19:40:36,941 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 19:40:36,941 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 19:40:36,941 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 19:40:36,941 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 19:40:36,942 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 19:40:36,942 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 19:40:36,942 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 19:40:36,942 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 19:40:36,943 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 19:40:36,943 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 19:40:36,943 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 19:40:36,944 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 19:40:36,944 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 19:40:36,944 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 19:40:36,944 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 19:40:36,945 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 19:40:36,945 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 19:40:37,204 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 19:40:37,204 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 19:40:37,205 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:40:37 BoogieIcfgContainer [2021-05-02 19:40:37,205 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 19:40:37,206 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 19:40:37,206 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 19:40:37,206 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 19:40:37,208 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:40:37" (1/1) ... [2021-05-02 19:40:37,221 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 07:40:37 BasicIcfg [2021-05-02 19:40:37,221 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 19:40:37,222 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 19:40:37,222 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 19:40:37,225 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 19:40:37,225 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 07:40:36" (1/4) ... [2021-05-02 19:40:37,225 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d04268e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 07:40:37, skipping insertion in model container [2021-05-02 19:40:37,225 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:40:36" (2/4) ... [2021-05-02 19:40:37,225 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d04268e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 07:40:37, skipping insertion in model container [2021-05-02 19:40:37,226 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:40:37" (3/4) ... [2021-05-02 19:40:37,226 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d04268e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 07:40:37, skipping insertion in model container [2021-05-02 19:40:37,226 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 07:40:37" (4/4) ... [2021-05-02 19:40:37,226 INFO L111 eAbstractionObserver]: Analyzing ICFG cohendiv-ll_unwindbound100.cJordan [2021-05-02 19:40:37,230 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 19:40:37,232 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 19:40:37,243 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 19:40:37,256 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 19:40:37,257 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 19:40:37,257 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 19:40:37,257 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 19:40:37,257 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 19:40:37,257 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 19:40:37,257 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 19:40:37,257 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 19:40:37,269 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 19:40:37,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 19:40:37,275 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:40:37,275 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:40:37,276 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:40:37,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:40:37,280 INFO L82 PathProgramCache]: Analyzing trace with hash 1213541379, now seen corresponding path program 1 times [2021-05-02 19:40:37,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:40:37,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579712753] [2021-05-02 19:40:37,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:40:37,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:40:37,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:40:37,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:40:37,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 19:40:37,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:40:37,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 19:40:37,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:40:37,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579712753] [2021-05-02 19:40:37,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579712753] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:40:37,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:40:37,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 19:40:37,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819378731] [2021-05-02 19:40:37,481 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 19:40:37,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:40:37,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 19:40:37,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 19:40:37,490 INFO L87 Difference]: Start difference. First operand has 38 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 19:40:37,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:40:37,624 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2021-05-02 19:40:37,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 19:40:37,625 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-02 19:40:37,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:40:37,630 INFO L225 Difference]: With dead ends: 39 [2021-05-02 19:40:37,630 INFO L226 Difference]: Without dead ends: 34 [2021-05-02 19:40:37,631 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 53.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 19:40:37,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-02 19:40:37,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2021-05-02 19:40:37,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 19 states have (on average 1.263157894736842) internal successors, (24), 20 states have internal predecessors, (24), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 19:40:37,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2021-05-02 19:40:37,657 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 17 [2021-05-02 19:40:37,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:40:37,657 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2021-05-02 19:40:37,657 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 19:40:37,657 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2021-05-02 19:40:37,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 19:40:37,658 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:40:37,658 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:40:37,658 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 19:40:37,658 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:40:37,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:40:37,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1202035559, now seen corresponding path program 1 times [2021-05-02 19:40:37,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:40:37,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592860309] [2021-05-02 19:40:37,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:40:37,672 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:40:37,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1697859874] [2021-05-02 19:40:37,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:40:37,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:40:37,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 19:40:37,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:40:37,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:37,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:37,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:37,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:37,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:37,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 19:40:37,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:40:37,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592860309] [2021-05-02 19:40:37,976 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:40:37,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697859874] [2021-05-02 19:40:37,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697859874] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:40:37,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:40:37,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 19:40:37,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702758331] [2021-05-02 19:40:37,978 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 19:40:37,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:40:37,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 19:40:37,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 19:40:37,979 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 19:40:38,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:40:38,004 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2021-05-02 19:40:38,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 19:40:38,005 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2021-05-02 19:40:38,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:40:38,007 INFO L225 Difference]: With dead ends: 35 [2021-05-02 19:40:38,007 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 19:40:38,009 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.8ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 19:40:38,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 19:40:38,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-02 19:40:38,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 22 states have internal predecessors, (26), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 19:40:38,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2021-05-02 19:40:38,020 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 18 [2021-05-02 19:40:38,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:40:38,020 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2021-05-02 19:40:38,020 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 19:40:38,020 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2021-05-02 19:40:38,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 19:40:38,020 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:40:38,021 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:40:38,243 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 19:40:38,244 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:40:38,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:40:38,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1200933292, now seen corresponding path program 1 times [2021-05-02 19:40:38,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:40:38,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338803463] [2021-05-02 19:40:38,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:40:38,261 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:40:38,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1194561594] [2021-05-02 19:40:38,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:40:38,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:40:38,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 19:40:38,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:40:38,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:38,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:38,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 19:40:38,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:40:38,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338803463] [2021-05-02 19:40:38,511 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:40:38,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194561594] [2021-05-02 19:40:38,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194561594] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:40:38,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:40:38,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 19:40:38,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144708325] [2021-05-02 19:40:38,512 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 19:40:38,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:40:38,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 19:40:38,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 19:40:38,513 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 8 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 19:40:38,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:40:38,713 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2021-05-02 19:40:38,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 19:40:38,714 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-02 19:40:38,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:40:38,715 INFO L225 Difference]: With dead ends: 43 [2021-05-02 19:40:38,715 INFO L226 Difference]: Without dead ends: 43 [2021-05-02 19:40:38,715 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 86.9ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:40:38,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-02 19:40:38,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2021-05-02 19:40:38,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 26 states have internal predecessors, (29), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 19:40:38,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2021-05-02 19:40:38,720 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 18 [2021-05-02 19:40:38,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:40:38,721 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2021-05-02 19:40:38,721 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 19:40:38,721 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2021-05-02 19:40:38,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 19:40:38,721 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:40:38,722 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:40:38,938 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:40:38,939 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:40:38,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:40:38,939 INFO L82 PathProgramCache]: Analyzing trace with hash -944097291, now seen corresponding path program 1 times [2021-05-02 19:40:38,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:40:38,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141923280] [2021-05-02 19:40:38,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:40:38,948 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:40:38,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [600307007] [2021-05-02 19:40:38,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:40:39,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:40:39,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 19:40:39,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:40:39,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:39,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:39,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:39,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:39,205 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 19:40:39,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:40:39,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141923280] [2021-05-02 19:40:39,205 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:40:39,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600307007] [2021-05-02 19:40:39,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600307007] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:40:39,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:40:39,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 19:40:39,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495188687] [2021-05-02 19:40:39,207 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 19:40:39,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:40:39,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 19:40:39,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 19:40:39,208 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 19:40:39,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:40:39,312 INFO L93 Difference]: Finished difference Result 56 states and 72 transitions. [2021-05-02 19:40:39,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 19:40:39,312 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-02 19:40:39,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:40:39,313 INFO L225 Difference]: With dead ends: 56 [2021-05-02 19:40:39,313 INFO L226 Difference]: Without dead ends: 55 [2021-05-02 19:40:39,313 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 64.9ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:40:39,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-02 19:40:39,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2021-05-02 19:40:39,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 32 states have (on average 1.21875) internal successors, (39), 33 states have internal predecessors, (39), 16 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-02 19:40:39,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 69 transitions. [2021-05-02 19:40:39,318 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 69 transitions. Word has length 23 [2021-05-02 19:40:39,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:40:39,319 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 69 transitions. [2021-05-02 19:40:39,319 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 19:40:39,319 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 69 transitions. [2021-05-02 19:40:39,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-02 19:40:39,319 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:40:39,320 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:40:39,536 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:40:39,536 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:40:39,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:40:39,537 INFO L82 PathProgramCache]: Analyzing trace with hash -653220550, now seen corresponding path program 1 times [2021-05-02 19:40:39,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:40:39,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92629248] [2021-05-02 19:40:39,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:40:39,553 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:40:39,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1033445340] [2021-05-02 19:40:39,553 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 19:40:39,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:40:39,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 19:40:39,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:40:39,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:39,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:39,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:39,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:39,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:39,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:39,704 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 19:40:39,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:40:39,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92629248] [2021-05-02 19:40:39,705 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:40:39,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033445340] [2021-05-02 19:40:39,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033445340] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:40:39,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:40:39,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 19:40:39,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496336340] [2021-05-02 19:40:39,706 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 19:40:39,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:40:39,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 19:40:39,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 19:40:39,707 INFO L87 Difference]: Start difference. First operand 54 states and 69 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 19:40:39,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:40:39,790 INFO L93 Difference]: Finished difference Result 81 states and 111 transitions. [2021-05-02 19:40:39,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 19:40:39,790 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 31 [2021-05-02 19:40:39,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:40:39,792 INFO L225 Difference]: With dead ends: 81 [2021-05-02 19:40:39,792 INFO L226 Difference]: Without dead ends: 81 [2021-05-02 19:40:39,792 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 37.9ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:40:39,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-05-02 19:40:39,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 74. [2021-05-02 19:40:39,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 44 states have (on average 1.2727272727272727) internal successors, (56), 46 states have internal predecessors, (56), 23 states have call successors, (23), 7 states have call predecessors, (23), 6 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 19:40:39,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 100 transitions. [2021-05-02 19:40:39,799 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 100 transitions. Word has length 31 [2021-05-02 19:40:39,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:40:39,799 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 100 transitions. [2021-05-02 19:40:39,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 19:40:39,799 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 100 transitions. [2021-05-02 19:40:39,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 19:40:39,800 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:40:39,800 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:40:40,019 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:40:40,020 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:40:40,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:40:40,020 INFO L82 PathProgramCache]: Analyzing trace with hash -830156892, now seen corresponding path program 1 times [2021-05-02 19:40:40,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:40:40,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890732435] [2021-05-02 19:40:40,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:40:40,030 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:40:40,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [97748075] [2021-05-02 19:40:40,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:40:40,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:40:40,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 19:40:40,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:40:40,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:40,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:40,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:40,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:40,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:40,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:40,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:40,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:40,174 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 19:40:40,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:40:40,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890732435] [2021-05-02 19:40:40,175 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:40:40,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97748075] [2021-05-02 19:40:40,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97748075] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:40:40,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:40:40,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 19:40:40,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062843487] [2021-05-02 19:40:40,175 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 19:40:40,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:40:40,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 19:40:40,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 19:40:40,176 INFO L87 Difference]: Start difference. First operand 74 states and 100 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 19:40:40,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:40:40,211 INFO L93 Difference]: Finished difference Result 78 states and 102 transitions. [2021-05-02 19:40:40,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 19:40:40,212 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 34 [2021-05-02 19:40:40,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:40:40,214 INFO L225 Difference]: With dead ends: 78 [2021-05-02 19:40:40,214 INFO L226 Difference]: Without dead ends: 78 [2021-05-02 19:40:40,214 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 7.2ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 19:40:40,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-05-02 19:40:40,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-05-02 19:40:40,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 47 states have (on average 1.2340425531914894) internal successors, (58), 49 states have internal predecessors, (58), 23 states have call successors, (23), 8 states have call predecessors, (23), 7 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 19:40:40,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 102 transitions. [2021-05-02 19:40:40,228 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 102 transitions. Word has length 34 [2021-05-02 19:40:40,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:40:40,228 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 102 transitions. [2021-05-02 19:40:40,228 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 19:40:40,228 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 102 transitions. [2021-05-02 19:40:40,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 19:40:40,229 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:40:40,229 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:40:40,452 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 19:40:40,452 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:40:40,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:40:40,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1527688582, now seen corresponding path program 1 times [2021-05-02 19:40:40,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:40:40,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075494250] [2021-05-02 19:40:40,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:40:40,461 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:40:40,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [595584130] [2021-05-02 19:40:40,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:40:40,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:40:40,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-02 19:40:40,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:40:40,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:40,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:40,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:40,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:40,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:40,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:40,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:40,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:40,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:40,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:40,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:40,585 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 19:40:40,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:40:40,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075494250] [2021-05-02 19:40:40,585 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:40:40,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595584130] [2021-05-02 19:40:40,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595584130] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:40:40,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:40:40,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 19:40:40,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170301263] [2021-05-02 19:40:40,586 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 19:40:40,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:40:40,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 19:40:40,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 19:40:40,586 INFO L87 Difference]: Start difference. First operand 78 states and 102 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 19:40:40,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:40:40,645 INFO L93 Difference]: Finished difference Result 82 states and 105 transitions. [2021-05-02 19:40:40,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 19:40:40,645 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 41 [2021-05-02 19:40:40,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:40:40,646 INFO L225 Difference]: With dead ends: 82 [2021-05-02 19:40:40,646 INFO L226 Difference]: Without dead ends: 82 [2021-05-02 19:40:40,646 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 35.7ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-02 19:40:40,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-05-02 19:40:40,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2021-05-02 19:40:40,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 50 states have (on average 1.22) internal successors, (61), 52 states have internal predecessors, (61), 23 states have call successors, (23), 9 states have call predecessors, (23), 8 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 19:40:40,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 105 transitions. [2021-05-02 19:40:40,651 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 105 transitions. Word has length 41 [2021-05-02 19:40:40,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:40:40,651 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 105 transitions. [2021-05-02 19:40:40,651 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 19:40:40,652 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 105 transitions. [2021-05-02 19:40:40,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 19:40:40,652 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:40:40,652 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:40:40,871 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:40:40,872 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:40:40,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:40:40,872 INFO L82 PathProgramCache]: Analyzing trace with hash 800232443, now seen corresponding path program 1 times [2021-05-02 19:40:40,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:40:40,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536321814] [2021-05-02 19:40:40,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:40:40,880 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:40:40,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1939581748] [2021-05-02 19:40:40,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:40:40,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:40:40,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 19:40:40,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:40:40,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:40,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:40,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:40,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:40,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:40,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:40,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:40,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:41,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:41,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:41,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:41,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:41,053 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 19:40:41,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:40:41,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536321814] [2021-05-02 19:40:41,054 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:40:41,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939581748] [2021-05-02 19:40:41,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939581748] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:40:41,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:40:41,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 19:40:41,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211528490] [2021-05-02 19:40:41,054 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 19:40:41,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:40:41,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 19:40:41,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 19:40:41,055 INFO L87 Difference]: Start difference. First operand 82 states and 105 transitions. Second operand has 11 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 19:40:41,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:40:41,165 INFO L93 Difference]: Finished difference Result 86 states and 108 transitions. [2021-05-02 19:40:41,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 19:40:41,165 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 47 [2021-05-02 19:40:41,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:40:41,166 INFO L225 Difference]: With dead ends: 86 [2021-05-02 19:40:41,166 INFO L226 Difference]: Without dead ends: 86 [2021-05-02 19:40:41,166 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 73.7ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-05-02 19:40:41,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-05-02 19:40:41,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2021-05-02 19:40:41,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 53 states have (on average 1.2075471698113207) internal successors, (64), 55 states have internal predecessors, (64), 23 states have call successors, (23), 10 states have call predecessors, (23), 9 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 19:40:41,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 108 transitions. [2021-05-02 19:40:41,171 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 108 transitions. Word has length 47 [2021-05-02 19:40:41,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:40:41,172 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 108 transitions. [2021-05-02 19:40:41,172 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 19:40:41,172 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 108 transitions. [2021-05-02 19:40:41,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-02 19:40:41,172 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:40:41,173 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:40:41,388 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:40:41,389 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:40:41,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:40:41,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1984817020, now seen corresponding path program 1 times [2021-05-02 19:40:41,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:40:41,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901391468] [2021-05-02 19:40:41,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:40:41,397 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:40:41,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1754674809] [2021-05-02 19:40:41,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:40:41,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:40:41,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 19:40:41,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:40:41,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:41,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:41,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:41,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:41,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:41,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:41,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:41,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:41,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:41,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:41,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:41,563 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 19:40:41,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:40:41,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901391468] [2021-05-02 19:40:41,564 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:40:41,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754674809] [2021-05-02 19:40:41,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754674809] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:40:41,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:40:41,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 19:40:41,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841905183] [2021-05-02 19:40:41,564 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 19:40:41,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:40:41,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 19:40:41,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 19:40:41,565 INFO L87 Difference]: Start difference. First operand 86 states and 108 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 5 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 19:40:41,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:40:41,608 INFO L93 Difference]: Finished difference Result 108 states and 127 transitions. [2021-05-02 19:40:41,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 19:40:41,609 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 5 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 50 [2021-05-02 19:40:41,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:40:41,610 INFO L225 Difference]: With dead ends: 108 [2021-05-02 19:40:41,610 INFO L226 Difference]: Without dead ends: 108 [2021-05-02 19:40:41,610 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 14.9ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 19:40:41,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-05-02 19:40:41,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 106. [2021-05-02 19:40:41,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 68 states have (on average 1.161764705882353) internal successors, (79), 71 states have internal predecessors, (79), 24 states have call successors, (24), 14 states have call predecessors, (24), 13 states have return successors, (22), 20 states have call predecessors, (22), 22 states have call successors, (22) [2021-05-02 19:40:41,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 125 transitions. [2021-05-02 19:40:41,615 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 125 transitions. Word has length 50 [2021-05-02 19:40:41,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:40:41,616 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 125 transitions. [2021-05-02 19:40:41,616 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 5 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 19:40:41,616 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 125 transitions. [2021-05-02 19:40:41,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-02 19:40:41,616 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:40:41,617 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:40:41,833 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-02 19:40:41,834 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:40:41,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:40:41,834 INFO L82 PathProgramCache]: Analyzing trace with hash 960315114, now seen corresponding path program 1 times [2021-05-02 19:40:41,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:40:41,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279522163] [2021-05-02 19:40:41,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:40:41,842 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:40:41,843 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [694644947] [2021-05-02 19:40:41,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:40:41,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:40:41,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 19:40:41,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:40:41,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:41,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:41,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:41,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:41,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:41,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:42,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:42,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:42,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:42,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:42,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:42,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:42,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:42,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:42,150 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-02 19:40:42,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:40:42,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279522163] [2021-05-02 19:40:42,151 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:40:42,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694644947] [2021-05-02 19:40:42,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694644947] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:40:42,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:40:42,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 19:40:42,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854229890] [2021-05-02 19:40:42,151 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 19:40:42,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:40:42,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 19:40:42,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 19:40:42,152 INFO L87 Difference]: Start difference. First operand 106 states and 125 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 19:40:42,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:40:42,385 INFO L93 Difference]: Finished difference Result 116 states and 136 transitions. [2021-05-02 19:40:42,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 19:40:42,385 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 55 [2021-05-02 19:40:42,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:40:42,386 INFO L225 Difference]: With dead ends: 116 [2021-05-02 19:40:42,386 INFO L226 Difference]: Without dead ends: 105 [2021-05-02 19:40:42,387 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 108.9ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-02 19:40:42,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-05-02 19:40:42,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 103. [2021-05-02 19:40:42,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 65 states have (on average 1.1538461538461537) internal successors, (75), 68 states have internal predecessors, (75), 24 states have call successors, (24), 14 states have call predecessors, (24), 13 states have return successors, (22), 20 states have call predecessors, (22), 22 states have call successors, (22) [2021-05-02 19:40:42,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 121 transitions. [2021-05-02 19:40:42,402 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 121 transitions. Word has length 55 [2021-05-02 19:40:42,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:40:42,403 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 121 transitions. [2021-05-02 19:40:42,403 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 19:40:42,403 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 121 transitions. [2021-05-02 19:40:42,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-02 19:40:42,404 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:40:42,404 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:40:42,624 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:40:42,624 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:40:42,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:40:42,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1119467195, now seen corresponding path program 1 times [2021-05-02 19:40:42,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:40:42,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005027561] [2021-05-02 19:40:42,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:40:42,633 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:40:42,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1338107981] [2021-05-02 19:40:42,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:40:42,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:40:42,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 19:40:42,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:40:42,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:42,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:42,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:42,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:42,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:42,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:42,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:42,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:42,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:42,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:42,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:42,832 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 14 proven. 34 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 19:40:42,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:40:42,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005027561] [2021-05-02 19:40:42,832 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:40:42,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338107981] [2021-05-02 19:40:42,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338107981] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:40:42,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:40:42,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 19:40:42,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666777484] [2021-05-02 19:40:42,833 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 19:40:42,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:40:42,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 19:40:42,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 19:40:42,834 INFO L87 Difference]: Start difference. First operand 103 states and 121 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 19:40:42,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:40:42,883 INFO L93 Difference]: Finished difference Result 106 states and 124 transitions. [2021-05-02 19:40:42,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 19:40:42,884 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 58 [2021-05-02 19:40:42,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:40:42,885 INFO L225 Difference]: With dead ends: 106 [2021-05-02 19:40:42,885 INFO L226 Difference]: Without dead ends: 106 [2021-05-02 19:40:42,885 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 16.1ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-05-02 19:40:42,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-05-02 19:40:42,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2021-05-02 19:40:42,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 68 states have (on average 1.1470588235294117) internal successors, (78), 70 states have internal predecessors, (78), 24 states have call successors, (24), 14 states have call predecessors, (24), 13 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2021-05-02 19:40:42,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 124 transitions. [2021-05-02 19:40:42,890 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 124 transitions. Word has length 58 [2021-05-02 19:40:42,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:40:42,891 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 124 transitions. [2021-05-02 19:40:42,891 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 19:40:42,891 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 124 transitions. [2021-05-02 19:40:42,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-02 19:40:42,892 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:40:42,892 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:40:43,115 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:40:43,115 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:40:43,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:40:43,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1669598821, now seen corresponding path program 1 times [2021-05-02 19:40:43,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:40:43,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875527813] [2021-05-02 19:40:43,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:40:43,124 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:40:43,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1659321934] [2021-05-02 19:40:43,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 19:40:43,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:40:43,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 19:40:43,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:40:43,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:43,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:43,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:43,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:43,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:43,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:43,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:43,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:43,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:43,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:43,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:43,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:43,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:43,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:43,350 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 18 proven. 112 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-02 19:40:43,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:40:43,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875527813] [2021-05-02 19:40:43,350 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:40:43,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659321934] [2021-05-02 19:40:43,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659321934] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:40:43,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:40:43,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 19:40:43,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851800186] [2021-05-02 19:40:43,351 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 19:40:43,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:40:43,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 19:40:43,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 19:40:43,351 INFO L87 Difference]: Start difference. First operand 106 states and 124 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 6 states have call successors, (13), 6 states have call predecessors, (13), 4 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-02 19:40:43,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:40:43,415 INFO L93 Difference]: Finished difference Result 128 states and 148 transitions. [2021-05-02 19:40:43,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 19:40:43,416 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 6 states have call successors, (13), 6 states have call predecessors, (13), 4 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) Word has length 74 [2021-05-02 19:40:43,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:40:43,417 INFO L225 Difference]: With dead ends: 128 [2021-05-02 19:40:43,417 INFO L226 Difference]: Without dead ends: 128 [2021-05-02 19:40:43,417 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 23.0ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 19:40:43,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-05-02 19:40:43,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 126. [2021-05-02 19:40:43,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 81 states have (on average 1.1358024691358024) internal successors, (92), 84 states have internal predecessors, (92), 28 states have call successors, (28), 17 states have call predecessors, (28), 16 states have return successors, (26), 24 states have call predecessors, (26), 26 states have call successors, (26) [2021-05-02 19:40:43,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 146 transitions. [2021-05-02 19:40:43,421 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 146 transitions. Word has length 74 [2021-05-02 19:40:43,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:40:43,422 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 146 transitions. [2021-05-02 19:40:43,422 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 6 states have call successors, (13), 6 states have call predecessors, (13), 4 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-02 19:40:43,422 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 146 transitions. [2021-05-02 19:40:43,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-02 19:40:43,423 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:40:43,423 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:40:43,640 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-02 19:40:43,640 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:40:43,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:40:43,640 INFO L82 PathProgramCache]: Analyzing trace with hash -286098381, now seen corresponding path program 1 times [2021-05-02 19:40:43,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:40:43,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18252592] [2021-05-02 19:40:43,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:40:43,646 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:40:43,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [761036500] [2021-05-02 19:40:43,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 19:40:43,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:40:43,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-02 19:40:43,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:40:43,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:43,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:43,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:43,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:43,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:43,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:43,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:43,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:43,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:43,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:43,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:43,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:43,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:43,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:43,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:43,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:43,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:43,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:43,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:43,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:43,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:43,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:43,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:43,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:43,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:43,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:44,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:44,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:44,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:44,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:44,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:44,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:44,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:44,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:44,248 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 57 proven. 21 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2021-05-02 19:40:44,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:40:44,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18252592] [2021-05-02 19:40:44,249 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:40:44,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761036500] [2021-05-02 19:40:44,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761036500] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:40:44,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:40:44,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-02 19:40:44,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053101867] [2021-05-02 19:40:44,250 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 19:40:44,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:40:44,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 19:40:44,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-05-02 19:40:44,251 INFO L87 Difference]: Start difference. First operand 126 states and 146 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 13 states have internal predecessors, (29), 7 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2021-05-02 19:40:44,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:40:44,629 INFO L93 Difference]: Finished difference Result 156 states and 188 transitions. [2021-05-02 19:40:44,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 19:40:44,629 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 13 states have internal predecessors, (29), 7 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) Word has length 79 [2021-05-02 19:40:44,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:40:44,630 INFO L225 Difference]: With dead ends: 156 [2021-05-02 19:40:44,631 INFO L226 Difference]: Without dead ends: 155 [2021-05-02 19:40:44,631 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 242.1ms TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-05-02 19:40:44,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-05-02 19:40:44,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 151. [2021-05-02 19:40:44,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 95 states have (on average 1.1578947368421053) internal successors, (110), 98 states have internal predecessors, (110), 37 states have call successors, (37), 19 states have call predecessors, (37), 18 states have return successors, (35), 33 states have call predecessors, (35), 35 states have call successors, (35) [2021-05-02 19:40:44,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 182 transitions. [2021-05-02 19:40:44,637 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 182 transitions. Word has length 79 [2021-05-02 19:40:44,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:40:44,638 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 182 transitions. [2021-05-02 19:40:44,638 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 13 states have internal predecessors, (29), 7 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2021-05-02 19:40:44,638 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 182 transitions. [2021-05-02 19:40:44,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-05-02 19:40:44,638 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:40:44,639 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:40:44,862 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-02 19:40:44,863 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:40:44,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:40:44,863 INFO L82 PathProgramCache]: Analyzing trace with hash -792688430, now seen corresponding path program 2 times [2021-05-02 19:40:44,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:40:44,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078339329] [2021-05-02 19:40:44,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:40:44,869 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:40:44,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1211921457] [2021-05-02 19:40:44,870 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 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 19:40:44,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 19:40:44,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:40:44,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 19:40:44,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:40:44,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:44,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:44,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:44,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:44,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:44,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:45,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:45,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:45,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:45,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:45,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:45,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:45,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:45,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:45,152 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 22 proven. 140 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-02 19:40:45,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:40:45,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078339329] [2021-05-02 19:40:45,152 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:40:45,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211921457] [2021-05-02 19:40:45,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211921457] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:40:45,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:40:45,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 19:40:45,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448378088] [2021-05-02 19:40:45,153 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 19:40:45,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:40:45,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 19:40:45,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 19:40:45,154 INFO L87 Difference]: Start difference. First operand 151 states and 182 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 6 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 19:40:45,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:40:45,224 INFO L93 Difference]: Finished difference Result 154 states and 185 transitions. [2021-05-02 19:40:45,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 19:40:45,224 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 6 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) Word has length 82 [2021-05-02 19:40:45,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:40:45,225 INFO L225 Difference]: With dead ends: 154 [2021-05-02 19:40:45,225 INFO L226 Difference]: Without dead ends: 154 [2021-05-02 19:40:45,226 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 28.1ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-02 19:40:45,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-05-02 19:40:45,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2021-05-02 19:40:45,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 98 states have (on average 1.153061224489796) internal successors, (113), 100 states have internal predecessors, (113), 37 states have call successors, (37), 19 states have call predecessors, (37), 18 states have return successors, (35), 34 states have call predecessors, (35), 35 states have call successors, (35) [2021-05-02 19:40:45,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 185 transitions. [2021-05-02 19:40:45,232 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 185 transitions. Word has length 82 [2021-05-02 19:40:45,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:40:45,232 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 185 transitions. [2021-05-02 19:40:45,232 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 6 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 19:40:45,232 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 185 transitions. [2021-05-02 19:40:45,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-02 19:40:45,233 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:40:45,233 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:40:45,455 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 19:40:45,455 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:40:45,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:40:45,456 INFO L82 PathProgramCache]: Analyzing trace with hash -2126505818, now seen corresponding path program 1 times [2021-05-02 19:40:45,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:40:45,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917402707] [2021-05-02 19:40:45,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:40:45,461 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:40:45,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [462593526] [2021-05-02 19:40:45,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 19:40:45,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:40:45,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-02 19:40:45,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:40:45,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:45,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:45,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:45,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:45,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:45,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:45,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:45,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:45,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:45,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:45,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:45,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:45,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:45,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:45,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:45,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:45,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:45,652 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 27 proven. 191 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-05-02 19:40:45,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:40:45,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917402707] [2021-05-02 19:40:45,652 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:40:45,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462593526] [2021-05-02 19:40:45,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462593526] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:40:45,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:40:45,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 19:40:45,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192859931] [2021-05-02 19:40:45,653 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 19:40:45,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:40:45,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 19:40:45,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 19:40:45,654 INFO L87 Difference]: Start difference. First operand 154 states and 185 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 7 states have call successors, (15), 7 states have call predecessors, (15), 5 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) [2021-05-02 19:40:45,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:40:45,769 INFO L93 Difference]: Finished difference Result 180 states and 211 transitions. [2021-05-02 19:40:45,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 19:40:45,770 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 7 states have call successors, (15), 7 states have call predecessors, (15), 5 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) Word has length 90 [2021-05-02 19:40:45,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:40:45,771 INFO L225 Difference]: With dead ends: 180 [2021-05-02 19:40:45,771 INFO L226 Difference]: Without dead ends: 180 [2021-05-02 19:40:45,772 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 33.8ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-02 19:40:45,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-05-02 19:40:45,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 178. [2021-05-02 19:40:45,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 114 states have (on average 1.131578947368421) internal successors, (129), 116 states have internal predecessors, (129), 41 states have call successors, (41), 23 states have call predecessors, (41), 22 states have return successors, (39), 38 states have call predecessors, (39), 39 states have call successors, (39) [2021-05-02 19:40:45,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 209 transitions. [2021-05-02 19:40:45,780 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 209 transitions. Word has length 90 [2021-05-02 19:40:45,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:40:45,780 INFO L480 AbstractCegarLoop]: Abstraction has 178 states and 209 transitions. [2021-05-02 19:40:45,781 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 7 states have call successors, (15), 7 states have call predecessors, (15), 5 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) [2021-05-02 19:40:45,781 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 209 transitions. [2021-05-02 19:40:45,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-05-02 19:40:45,782 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:40:45,782 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:40:46,000 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:40:46,000 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:40:46,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:40:46,001 INFO L82 PathProgramCache]: Analyzing trace with hash -169757262, now seen corresponding path program 2 times [2021-05-02 19:40:46,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:40:46,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976452601] [2021-05-02 19:40:46,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:40:46,013 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:40:46,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1741751658] [2021-05-02 19:40:46,013 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:40:46,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 19:40:46,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:40:46,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-02 19:40:46,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:40:46,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:46,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:46,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:46,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:46,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:46,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:46,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:46,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:46,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:46,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:46,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:46,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:46,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:46,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:46,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:46,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:46,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:46,217 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 26 proven. 270 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-05-02 19:40:46,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:40:46,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976452601] [2021-05-02 19:40:46,218 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:40:46,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741751658] [2021-05-02 19:40:46,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741751658] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:40:46,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:40:46,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 19:40:46,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717268341] [2021-05-02 19:40:46,219 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 19:40:46,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:40:46,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 19:40:46,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 19:40:46,219 INFO L87 Difference]: Start difference. First operand 178 states and 209 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 7 states have call successors, (17), 7 states have call predecessors, (17), 5 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-02 19:40:46,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:40:46,320 INFO L93 Difference]: Finished difference Result 181 states and 212 transitions. [2021-05-02 19:40:46,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 19:40:46,320 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 7 states have call successors, (17), 7 states have call predecessors, (17), 5 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) Word has length 98 [2021-05-02 19:40:46,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:40:46,321 INFO L225 Difference]: With dead ends: 181 [2021-05-02 19:40:46,322 INFO L226 Difference]: Without dead ends: 181 [2021-05-02 19:40:46,322 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 32.1ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:40:46,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-05-02 19:40:46,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2021-05-02 19:40:46,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 117 states have (on average 1.1282051282051282) internal successors, (132), 119 states have internal predecessors, (132), 41 states have call successors, (41), 23 states have call predecessors, (41), 22 states have return successors, (39), 38 states have call predecessors, (39), 39 states have call successors, (39) [2021-05-02 19:40:46,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 212 transitions. [2021-05-02 19:40:46,330 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 212 transitions. Word has length 98 [2021-05-02 19:40:46,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:40:46,330 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 212 transitions. [2021-05-02 19:40:46,330 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 7 states have call successors, (17), 7 states have call predecessors, (17), 5 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-02 19:40:46,330 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 212 transitions. [2021-05-02 19:40:46,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-05-02 19:40:46,331 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:40:46,332 INFO L523 BasicCegarLoop]: trace histogram [15, 14, 14, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:40:46,553 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-02 19:40:46,553 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:40:46,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:40:46,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1237757564, now seen corresponding path program 2 times [2021-05-02 19:40:46,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:40:46,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011952234] [2021-05-02 19:40:46,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:40:46,560 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:40:46,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1011185106] [2021-05-02 19:40:46,561 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:40:46,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 19:40:46,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:40:46,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 19:40:46,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:40:46,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:46,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:46,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:46,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:46,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:46,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:46,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:46,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:46,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:46,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:46,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:46,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:46,911 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 51 proven. 40 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-05-02 19:40:46,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:40:46,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011952234] [2021-05-02 19:40:46,911 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:40:46,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011185106] [2021-05-02 19:40:46,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011185106] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:40:46,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:40:46,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 19:40:46,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445232549] [2021-05-02 19:40:46,912 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 19:40:46,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:40:46,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 19:40:46,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-05-02 19:40:46,912 INFO L87 Difference]: Start difference. First operand 181 states and 212 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) [2021-05-02 19:40:47,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:40:47,210 INFO L93 Difference]: Finished difference Result 214 states and 256 transitions. [2021-05-02 19:40:47,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 19:40:47,211 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) Word has length 103 [2021-05-02 19:40:47,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:40:47,212 INFO L225 Difference]: With dead ends: 214 [2021-05-02 19:40:47,212 INFO L226 Difference]: Without dead ends: 213 [2021-05-02 19:40:47,212 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 122.1ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-05-02 19:40:47,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-05-02 19:40:47,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 210. [2021-05-02 19:40:47,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 134 states have (on average 1.1417910447761195) internal successors, (153), 136 states have internal predecessors, (153), 50 states have call successors, (50), 26 states have call predecessors, (50), 25 states have return successors, (48), 47 states have call predecessors, (48), 48 states have call successors, (48) [2021-05-02 19:40:47,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 251 transitions. [2021-05-02 19:40:47,218 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 251 transitions. Word has length 103 [2021-05-02 19:40:47,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:40:47,218 INFO L480 AbstractCegarLoop]: Abstraction has 210 states and 251 transitions. [2021-05-02 19:40:47,219 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) [2021-05-02 19:40:47,219 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 251 transitions. [2021-05-02 19:40:47,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-05-02 19:40:47,219 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:40:47,219 INFO L523 BasicCegarLoop]: trace histogram [15, 14, 14, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:40:47,435 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-02 19:40:47,436 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:40:47,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:40:47,436 INFO L82 PathProgramCache]: Analyzing trace with hash 2014256518, now seen corresponding path program 3 times [2021-05-02 19:40:47,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:40:47,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773235126] [2021-05-02 19:40:47,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:40:47,443 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:40:47,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [919074902] [2021-05-02 19:40:47,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:40:47,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-02 19:40:47,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:40:47,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-02 19:40:47,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:40:47,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:47,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:47,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:47,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:47,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:47,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:47,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:47,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:47,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:47,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:47,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:47,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:47,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:47,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:47,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:47,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:47,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:47,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:47,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:47,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:47,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:47,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:47,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:47,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:47,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:47,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:47,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:47,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:47,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:47,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:47,759 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 86 proven. 36 refuted. 0 times theorem prover too weak. 298 trivial. 0 not checked. [2021-05-02 19:40:47,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:40:47,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773235126] [2021-05-02 19:40:47,759 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:40:47,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919074902] [2021-05-02 19:40:47,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919074902] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:40:47,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:40:47,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 19:40:47,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928578898] [2021-05-02 19:40:47,760 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 19:40:47,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:40:47,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 19:40:47,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-05-02 19:40:47,761 INFO L87 Difference]: Start difference. First operand 210 states and 251 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 12 states have internal predecessors, (34), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-02 19:40:56,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:40:56,143 INFO L93 Difference]: Finished difference Result 252 states and 298 transitions. [2021-05-02 19:40:56,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 19:40:56,144 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 12 states have internal predecessors, (34), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 106 [2021-05-02 19:40:56,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:40:56,145 INFO L225 Difference]: With dead ends: 252 [2021-05-02 19:40:56,145 INFO L226 Difference]: Without dead ends: 243 [2021-05-02 19:40:56,145 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 165.4ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-05-02 19:40:56,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-05-02 19:40:56,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 235. [2021-05-02 19:40:56,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 152 states have (on average 1.105263157894737) internal successors, (168), 155 states have internal predecessors, (168), 52 states have call successors, (52), 31 states have call predecessors, (52), 30 states have return successors, (50), 48 states have call predecessors, (50), 50 states have call successors, (50) [2021-05-02 19:40:56,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 270 transitions. [2021-05-02 19:40:56,153 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 270 transitions. Word has length 106 [2021-05-02 19:40:56,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:40:56,154 INFO L480 AbstractCegarLoop]: Abstraction has 235 states and 270 transitions. [2021-05-02 19:40:56,154 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 12 states have internal predecessors, (34), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-02 19:40:56,154 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 270 transitions. [2021-05-02 19:40:56,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-05-02 19:40:56,155 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:40:56,155 INFO L523 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:40:56,356 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-02 19:40:56,356 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:40:56,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:40:56,357 INFO L82 PathProgramCache]: Analyzing trace with hash 46832061, now seen corresponding path program 2 times [2021-05-02 19:40:56,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:40:56,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816674478] [2021-05-02 19:40:56,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:40:56,362 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:40:56,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1551613810] [2021-05-02 19:40:56,362 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:40:56,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 19:40:56,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:40:56,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-02 19:40:56,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:40:56,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:56,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:56,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:56,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:56,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:56,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:56,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:56,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:56,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:56,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:56,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:56,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:56,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:56,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:56,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:56,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:56,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:56,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:56,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:56,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:56,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:56,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:56,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:56,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:56,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:56,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:56,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:56,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:56,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:56,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:56,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:56,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:56,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:56,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:56,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:56,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:56,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:56,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:56,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:56,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:56,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:56,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:56,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:56,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:56,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:56,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:56,648 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 102 proven. 18 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2021-05-02 19:40:56,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:40:56,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816674478] [2021-05-02 19:40:56,648 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:40:56,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551613810] [2021-05-02 19:40:56,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551613810] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:40:56,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:40:56,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 19:40:56,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534342505] [2021-05-02 19:40:56,650 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 19:40:56,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:40:56,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 19:40:56,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-02 19:40:56,651 INFO L87 Difference]: Start difference. First operand 235 states and 270 transitions. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2021-05-02 19:40:56,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:40:56,776 INFO L93 Difference]: Finished difference Result 275 states and 331 transitions. [2021-05-02 19:40:56,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 19:40:56,776 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 114 [2021-05-02 19:40:56,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:40:56,778 INFO L225 Difference]: With dead ends: 275 [2021-05-02 19:40:56,778 INFO L226 Difference]: Without dead ends: 247 [2021-05-02 19:40:56,778 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 53.8ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:40:56,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-05-02 19:40:56,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 227. [2021-05-02 19:40:56,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 146 states have (on average 1.13013698630137) internal successors, (165), 150 states have internal predecessors, (165), 54 states have call successors, (54), 27 states have call predecessors, (54), 26 states have return successors, (52), 49 states have call predecessors, (52), 52 states have call successors, (52) [2021-05-02 19:40:56,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 271 transitions. [2021-05-02 19:40:56,784 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 271 transitions. Word has length 114 [2021-05-02 19:40:56,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:40:56,784 INFO L480 AbstractCegarLoop]: Abstraction has 227 states and 271 transitions. [2021-05-02 19:40:56,784 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2021-05-02 19:40:56,784 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 271 transitions. [2021-05-02 19:40:56,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-05-02 19:40:56,785 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:40:56,786 INFO L523 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:40:57,004 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:40:57,007 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:40:57,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:40:57,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1109340483, now seen corresponding path program 3 times [2021-05-02 19:40:57,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:40:57,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057247041] [2021-05-02 19:40:57,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:40:57,024 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:40:57,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1867109231] [2021-05-02 19:40:57,024 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:40:57,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 19:40:57,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:40:57,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-02 19:40:57,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:40:57,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:57,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:57,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:57,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:57,314 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 106 proven. 18 refuted. 0 times theorem prover too weak. 362 trivial. 0 not checked. [2021-05-02 19:40:57,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:40:57,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057247041] [2021-05-02 19:40:57,314 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:40:57,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867109231] [2021-05-02 19:40:57,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867109231] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:40:57,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:40:57,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 19:40:57,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479001386] [2021-05-02 19:40:57,315 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 19:40:57,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:40:57,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 19:40:57,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:40:57,315 INFO L87 Difference]: Start difference. First operand 227 states and 271 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 19:40:59,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:40:59,555 INFO L93 Difference]: Finished difference Result 236 states and 281 transitions. [2021-05-02 19:40:59,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 19:40:59,556 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) Word has length 114 [2021-05-02 19:40:59,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:40:59,557 INFO L225 Difference]: With dead ends: 236 [2021-05-02 19:40:59,557 INFO L226 Difference]: Without dead ends: 227 [2021-05-02 19:40:59,557 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 85.0ms TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-05-02 19:40:59,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-05-02 19:40:59,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 225. [2021-05-02 19:40:59,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 143 states have (on average 1.118881118881119) internal successors, (160), 147 states have internal predecessors, (160), 54 states have call successors, (54), 28 states have call predecessors, (54), 27 states have return successors, (51), 49 states have call predecessors, (51), 51 states have call successors, (51) [2021-05-02 19:40:59,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 265 transitions. [2021-05-02 19:40:59,562 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 265 transitions. Word has length 114 [2021-05-02 19:40:59,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:40:59,562 INFO L480 AbstractCegarLoop]: Abstraction has 225 states and 265 transitions. [2021-05-02 19:40:59,563 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 19:40:59,563 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 265 transitions. [2021-05-02 19:40:59,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-05-02 19:40:59,563 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:40:59,563 INFO L523 BasicCegarLoop]: trace histogram [18, 17, 17, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:40:59,764 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:40:59,764 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:40:59,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:40:59,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1953340215, now seen corresponding path program 4 times [2021-05-02 19:40:59,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:40:59,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210066122] [2021-05-02 19:40:59,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:40:59,774 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:40:59,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [631971272] [2021-05-02 19:40:59,774 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:40:59,824 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 19:40:59,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:40:59,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-02 19:40:59,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:40:59,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:59,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:59,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:59,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:59,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:59,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:59,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:59,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:59,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:59,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:59,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:59,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:59,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:59,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:59,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:59,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:59,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:59,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:59,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:59,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:59,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:59,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:59,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:59,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:59,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:59,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:59,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:59,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:59,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:40:59,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:00,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:00,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:00,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:00,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:00,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:00,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:00,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:00,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:00,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:00,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:00,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:00,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:00,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:00,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:00,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:00,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:00,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:00,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:00,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:00,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:00,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:00,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:00,218 INFO L134 CoverageAnalysis]: Checked inductivity of 622 backedges. 45 proven. 81 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2021-05-02 19:41:00,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:41:00,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210066122] [2021-05-02 19:41:00,218 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:41:00,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631971272] [2021-05-02 19:41:00,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631971272] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:41:00,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:41:00,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-02 19:41:00,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210526995] [2021-05-02 19:41:00,219 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 19:41:00,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:41:00,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 19:41:00,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-05-02 19:41:00,220 INFO L87 Difference]: Start difference. First operand 225 states and 265 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 16 states have internal predecessors, (37), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 9 states have call predecessors, (19), 8 states have call successors, (19) [2021-05-02 19:41:00,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:41:00,683 INFO L93 Difference]: Finished difference Result 287 states and 345 transitions. [2021-05-02 19:41:00,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 19:41:00,683 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 16 states have internal predecessors, (37), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 9 states have call predecessors, (19), 8 states have call successors, (19) Word has length 122 [2021-05-02 19:41:00,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:41:00,685 INFO L225 Difference]: With dead ends: 287 [2021-05-02 19:41:00,685 INFO L226 Difference]: Without dead ends: 282 [2021-05-02 19:41:00,685 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 210.7ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-05-02 19:41:00,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-05-02 19:41:00,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 277. [2021-05-02 19:41:00,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 174 states have (on average 1.132183908045977) internal successors, (197), 178 states have internal predecessors, (197), 70 states have call successors, (70), 33 states have call predecessors, (70), 32 states have return successors, (67), 65 states have call predecessors, (67), 67 states have call successors, (67) [2021-05-02 19:41:00,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 334 transitions. [2021-05-02 19:41:00,690 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 334 transitions. Word has length 122 [2021-05-02 19:41:00,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:41:00,691 INFO L480 AbstractCegarLoop]: Abstraction has 277 states and 334 transitions. [2021-05-02 19:41:00,691 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 16 states have internal predecessors, (37), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 9 states have call predecessors, (19), 8 states have call successors, (19) [2021-05-02 19:41:00,691 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 334 transitions. [2021-05-02 19:41:00,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-05-02 19:41:00,692 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:41:00,692 INFO L523 BasicCegarLoop]: trace histogram [19, 18, 18, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:41:00,908 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-02 19:41:00,908 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:41:00,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:41:00,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1409290752, now seen corresponding path program 3 times [2021-05-02 19:41:00,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:41:00,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057310093] [2021-05-02 19:41:00,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:41:00,919 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:41:00,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1926127490] [2021-05-02 19:41:00,919 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:41:01,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-02 19:41:01,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:41:01,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 19:41:01,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:41:03,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:03,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:03,582 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 100 proven. 12 refuted. 0 times theorem prover too weak. 594 trivial. 0 not checked. [2021-05-02 19:41:03,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:41:03,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057310093] [2021-05-02 19:41:03,582 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:41:03,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926127490] [2021-05-02 19:41:03,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926127490] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:41:03,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:41:03,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 19:41:03,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708381367] [2021-05-02 19:41:03,583 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 19:41:03,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:41:03,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 19:41:03,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=66, Unknown=1, NotChecked=0, Total=90 [2021-05-02 19:41:03,583 INFO L87 Difference]: Start difference. First operand 277 states and 334 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-05-02 19:41:09,625 WARN L205 SmtUtils]: Spent 4.02 s on a formula simplification that was a NOOP. DAG size: 22 [2021-05-02 19:41:36,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:41:36,907 INFO L93 Difference]: Finished difference Result 309 states and 381 transitions. [2021-05-02 19:41:36,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 19:41:36,908 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 130 [2021-05-02 19:41:36,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:41:36,909 INFO L225 Difference]: With dead ends: 309 [2021-05-02 19:41:36,909 INFO L226 Difference]: Without dead ends: 304 [2021-05-02 19:41:36,909 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 8423.1ms TimeCoverageRelationStatistics Valid=40, Invalid=114, Unknown=2, NotChecked=0, Total=156 [2021-05-02 19:41:36,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-05-02 19:41:36,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 234. [2021-05-02 19:41:36,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 149 states have (on average 1.1073825503355705) internal successors, (165), 154 states have internal predecessors, (165), 55 states have call successors, (55), 30 states have call predecessors, (55), 29 states have return successors, (52), 49 states have call predecessors, (52), 52 states have call successors, (52) [2021-05-02 19:41:36,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 272 transitions. [2021-05-02 19:41:36,915 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 272 transitions. Word has length 130 [2021-05-02 19:41:36,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:41:36,916 INFO L480 AbstractCegarLoop]: Abstraction has 234 states and 272 transitions. [2021-05-02 19:41:36,916 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-05-02 19:41:36,916 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 272 transitions. [2021-05-02 19:41:36,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-05-02 19:41:36,917 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:41:36,917 INFO L523 BasicCegarLoop]: trace histogram [20, 19, 19, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:41:37,133 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-02 19:41:37,133 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:41:37,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:41:37,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1769981228, now seen corresponding path program 4 times [2021-05-02 19:41:37,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:41:37,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787822218] [2021-05-02 19:41:37,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:41:37,139 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:41:37,139 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1192333603] [2021-05-02 19:41:37,139 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:41:37,203 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 19:41:37,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:41:37,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 50 conjunts are in the unsatisfiable core [2021-05-02 19:41:37,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:41:37,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:37,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:37,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:37,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:37,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:37,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:37,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:37,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:37,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:37,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:37,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:37,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:37,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:37,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:37,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:37,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:37,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:37,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:37,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:37,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:37,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:37,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:37,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:37,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:37,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:37,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:37,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:37,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:37,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:37,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:37,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:37,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:37,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:37,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:37,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:37,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:37,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:37,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:37,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:37,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:37,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:37,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:37,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:37,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:37,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:37,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:37,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:37,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:37,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:37,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:37,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:37,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:37,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:37,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:37,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:37,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:37,744 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 49 proven. 103 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2021-05-02 19:41:37,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:41:37,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787822218] [2021-05-02 19:41:37,745 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:41:37,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192333603] [2021-05-02 19:41:37,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192333603] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:41:37,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:41:37,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-05-02 19:41:37,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989370847] [2021-05-02 19:41:37,746 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-02 19:41:37,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:41:37,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-02 19:41:37,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-05-02 19:41:37,748 INFO L87 Difference]: Start difference. First operand 234 states and 272 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 18 states have internal predecessors, (43), 10 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 10 states have call predecessors, (21), 9 states have call successors, (21) [2021-05-02 19:41:38,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:41:38,343 INFO L93 Difference]: Finished difference Result 288 states and 334 transitions. [2021-05-02 19:41:38,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 19:41:38,344 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 18 states have internal predecessors, (43), 10 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 10 states have call predecessors, (21), 9 states have call successors, (21) Word has length 138 [2021-05-02 19:41:38,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:41:38,345 INFO L225 Difference]: With dead ends: 288 [2021-05-02 19:41:38,345 INFO L226 Difference]: Without dead ends: 274 [2021-05-02 19:41:38,346 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 280.0ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-05-02 19:41:38,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-05-02 19:41:38,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 270. [2021-05-02 19:41:38,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 174 states have (on average 1.0977011494252873) internal successors, (191), 179 states have internal predecessors, (191), 61 states have call successors, (61), 35 states have call predecessors, (61), 34 states have return successors, (58), 55 states have call predecessors, (58), 58 states have call successors, (58) [2021-05-02 19:41:38,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 310 transitions. [2021-05-02 19:41:38,352 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 310 transitions. Word has length 138 [2021-05-02 19:41:38,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:41:38,353 INFO L480 AbstractCegarLoop]: Abstraction has 270 states and 310 transitions. [2021-05-02 19:41:38,354 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 18 states have internal predecessors, (43), 10 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 10 states have call predecessors, (21), 9 states have call successors, (21) [2021-05-02 19:41:38,354 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 310 transitions. [2021-05-02 19:41:38,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-05-02 19:41:38,355 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:41:38,355 INFO L523 BasicCegarLoop]: trace histogram [22, 21, 21, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:41:38,569 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:41:38,569 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:41:38,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:41:38,569 INFO L82 PathProgramCache]: Analyzing trace with hash -493605665, now seen corresponding path program 5 times [2021-05-02 19:41:38,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:41:38,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147852343] [2021-05-02 19:41:38,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:41:38,576 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:41:38,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [580498321] [2021-05-02 19:41:38,576 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:41:38,703 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-05-02 19:41:38,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:41:38,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-02 19:41:38,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:41:38,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:38,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:38,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:38,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:38,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:38,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:38,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:38,913 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 481 proven. 1 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2021-05-02 19:41:38,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:41:38,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147852343] [2021-05-02 19:41:38,913 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:41:38,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580498321] [2021-05-02 19:41:38,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580498321] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:41:38,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:41:38,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 19:41:38,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724072222] [2021-05-02 19:41:38,914 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 19:41:38,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:41:38,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 19:41:38,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-02 19:41:38,915 INFO L87 Difference]: Start difference. First operand 270 states and 310 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-05-02 19:41:38,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:41:38,949 INFO L93 Difference]: Finished difference Result 268 states and 297 transitions. [2021-05-02 19:41:38,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 19:41:38,949 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 154 [2021-05-02 19:41:38,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:41:38,950 INFO L225 Difference]: With dead ends: 268 [2021-05-02 19:41:38,950 INFO L226 Difference]: Without dead ends: 195 [2021-05-02 19:41:38,951 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 20.5ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-05-02 19:41:38,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-05-02 19:41:38,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 193. [2021-05-02 19:41:38,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 124 states have (on average 1.0725806451612903) internal successors, (133), 129 states have internal predecessors, (133), 43 states have call successors, (43), 27 states have call predecessors, (43), 25 states have return successors, (38), 36 states have call predecessors, (38), 38 states have call successors, (38) [2021-05-02 19:41:38,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 214 transitions. [2021-05-02 19:41:38,954 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 214 transitions. Word has length 154 [2021-05-02 19:41:38,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:41:38,954 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 214 transitions. [2021-05-02 19:41:38,954 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-05-02 19:41:38,955 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 214 transitions. [2021-05-02 19:41:38,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-05-02 19:41:38,955 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:41:38,955 INFO L523 BasicCegarLoop]: trace histogram [24, 23, 23, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:41:39,171 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-05-02 19:41:39,171 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:41:39,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:41:39,171 INFO L82 PathProgramCache]: Analyzing trace with hash -604387605, now seen corresponding path program 6 times [2021-05-02 19:41:39,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:41:39,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056349912] [2021-05-02 19:41:39,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:41:39,179 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:41:39,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2052270422] [2021-05-02 19:41:39,179 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:41:39,254 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-05-02 19:41:39,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:41:39,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 19:41:39,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:41:39,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:39,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:39,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:39,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:39,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:39,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:39,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:39,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:39,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:39,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:39,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:39,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:39,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:39,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:39,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:39,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:39,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:39,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:39,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:39,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:39,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:39,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:39,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:39,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:39,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:39,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:39,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1150 backedges. 51 proven. 983 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-05-02 19:41:39,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:41:39,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056349912] [2021-05-02 19:41:39,502 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:41:39,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052270422] [2021-05-02 19:41:39,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052270422] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:41:39,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:41:39,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 19:41:39,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039559634] [2021-05-02 19:41:39,503 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 19:41:39,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:41:39,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 19:41:39,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-02 19:41:39,503 INFO L87 Difference]: Start difference. First operand 193 states and 214 transitions. Second operand has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 10 states have internal predecessors, (62), 10 states have call successors, (27), 10 states have call predecessors, (27), 8 states have return successors, (25), 8 states have call predecessors, (25), 9 states have call successors, (25) [2021-05-02 19:41:39,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:41:39,713 INFO L93 Difference]: Finished difference Result 294 states and 324 transitions. [2021-05-02 19:41:39,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 19:41:39,714 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 10 states have internal predecessors, (62), 10 states have call successors, (27), 10 states have call predecessors, (27), 8 states have return successors, (25), 8 states have call predecessors, (25), 9 states have call successors, (25) Word has length 162 [2021-05-02 19:41:39,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:41:39,715 INFO L225 Difference]: With dead ends: 294 [2021-05-02 19:41:39,715 INFO L226 Difference]: Without dead ends: 294 [2021-05-02 19:41:39,715 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 78.0ms TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-05-02 19:41:39,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-05-02 19:41:39,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 286. [2021-05-02 19:41:39,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 185 states have (on average 1.0648648648648649) internal successors, (197), 191 states have internal predecessors, (197), 62 states have call successors, (62), 40 states have call predecessors, (62), 38 states have return successors, (57), 54 states have call predecessors, (57), 57 states have call successors, (57) [2021-05-02 19:41:39,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 316 transitions. [2021-05-02 19:41:39,725 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 316 transitions. Word has length 162 [2021-05-02 19:41:39,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:41:39,726 INFO L480 AbstractCegarLoop]: Abstraction has 286 states and 316 transitions. [2021-05-02 19:41:39,726 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 10 states have internal predecessors, (62), 10 states have call successors, (27), 10 states have call predecessors, (27), 8 states have return successors, (25), 8 states have call predecessors, (25), 9 states have call successors, (25) [2021-05-02 19:41:39,726 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 316 transitions. [2021-05-02 19:41:39,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-05-02 19:41:39,727 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:41:39,727 INFO L523 BasicCegarLoop]: trace histogram [27, 26, 26, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:41:39,943 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:41:39,943 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:41:39,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:41:39,943 INFO L82 PathProgramCache]: Analyzing trace with hash 1937088971, now seen corresponding path program 5 times [2021-05-02 19:41:39,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:41:39,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158533957] [2021-05-02 19:41:39,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:41:39,954 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:41:39,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1170927857] [2021-05-02 19:41:39,954 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:41:40,056 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-05-02 19:41:40,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:41:40,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 19:41:40,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:41:40,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:40,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:40,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:40,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:40,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:40,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:40,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:40,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:40,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:40,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:40,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:40,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:40,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:40,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:40,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:40,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:40,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:40,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:40,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:40,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:40,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:40,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:40,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:40,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:40,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:40,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:40,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:40,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:40,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:40,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1464 backedges. 52 proven. 1284 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-05-02 19:41:40,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:41:40,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158533957] [2021-05-02 19:41:40,329 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:41:40,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170927857] [2021-05-02 19:41:40,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170927857] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:41:40,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:41:40,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 19:41:40,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099767369] [2021-05-02 19:41:40,331 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 19:41:40,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:41:40,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 19:41:40,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-02 19:41:40,332 INFO L87 Difference]: Start difference. First operand 286 states and 316 transitions. Second operand has 12 states, 12 states have (on average 5.5) internal successors, (66), 11 states have internal predecessors, (66), 11 states have call successors, (30), 11 states have call predecessors, (30), 9 states have return successors, (28), 9 states have call predecessors, (28), 10 states have call successors, (28) [2021-05-02 19:41:40,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:41:40,548 INFO L93 Difference]: Finished difference Result 350 states and 390 transitions. [2021-05-02 19:41:40,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 19:41:40,548 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.5) internal successors, (66), 11 states have internal predecessors, (66), 11 states have call successors, (30), 11 states have call predecessors, (30), 9 states have return successors, (28), 9 states have call predecessors, (28), 10 states have call successors, (28) Word has length 178 [2021-05-02 19:41:40,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:41:40,549 INFO L225 Difference]: With dead ends: 350 [2021-05-02 19:41:40,549 INFO L226 Difference]: Without dead ends: 350 [2021-05-02 19:41:40,550 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 73.9ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-05-02 19:41:40,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-05-02 19:41:40,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 339. [2021-05-02 19:41:40,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 218 states have (on average 1.0642201834862386) internal successors, (232), 226 states have internal predecessors, (232), 76 states have call successors, (76), 46 states have call predecessors, (76), 44 states have return successors, (71), 66 states have call predecessors, (71), 71 states have call successors, (71) [2021-05-02 19:41:40,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 379 transitions. [2021-05-02 19:41:40,556 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 379 transitions. Word has length 178 [2021-05-02 19:41:40,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:41:40,556 INFO L480 AbstractCegarLoop]: Abstraction has 339 states and 379 transitions. [2021-05-02 19:41:40,556 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.5) internal successors, (66), 11 states have internal predecessors, (66), 11 states have call successors, (30), 11 states have call predecessors, (30), 9 states have return successors, (28), 9 states have call predecessors, (28), 10 states have call successors, (28) [2021-05-02 19:41:40,556 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 379 transitions. [2021-05-02 19:41:40,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-05-02 19:41:40,557 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:41:40,557 INFO L523 BasicCegarLoop]: trace histogram [28, 27, 27, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:41:40,772 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-02 19:41:40,772 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:41:40,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:41:40,773 INFO L82 PathProgramCache]: Analyzing trace with hash 846162435, now seen corresponding path program 3 times [2021-05-02 19:41:40,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:41:40,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941344607] [2021-05-02 19:41:40,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:41:40,783 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:41:40,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [511236407] [2021-05-02 19:41:40,783 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:41:40,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 19:41:40,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:41:40,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-02 19:41:40,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:41:41,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:41,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:41,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:41,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:41,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:41,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:41,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1574 backedges. 243 proven. 94 refuted. 0 times theorem prover too weak. 1237 trivial. 0 not checked. [2021-05-02 19:41:41,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:41:41,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941344607] [2021-05-02 19:41:41,094 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:41:41,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511236407] [2021-05-02 19:41:41,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511236407] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:41:41,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:41:41,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 19:41:41,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057968722] [2021-05-02 19:41:41,096 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 19:41:41,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:41:41,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 19:41:41,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:41:41,097 INFO L87 Difference]: Start difference. First operand 339 states and 379 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 5 states have call successors, (16) [2021-05-02 19:41:49,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:41:49,452 INFO L93 Difference]: Finished difference Result 346 states and 384 transitions. [2021-05-02 19:41:49,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 19:41:49,453 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 5 states have call successors, (16) Word has length 183 [2021-05-02 19:41:49,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:41:49,454 INFO L225 Difference]: With dead ends: 346 [2021-05-02 19:41:49,454 INFO L226 Difference]: Without dead ends: 331 [2021-05-02 19:41:49,454 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 173 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 129.4ms TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-05-02 19:41:49,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2021-05-02 19:41:49,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 324. [2021-05-02 19:41:49,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 209 states have (on average 1.0478468899521531) internal successors, (219), 214 states have internal predecessors, (219), 71 states have call successors, (71), 45 states have call predecessors, (71), 43 states have return successors, (69), 64 states have call predecessors, (69), 69 states have call successors, (69) [2021-05-02 19:41:49,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 359 transitions. [2021-05-02 19:41:49,459 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 359 transitions. Word has length 183 [2021-05-02 19:41:49,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:41:49,459 INFO L480 AbstractCegarLoop]: Abstraction has 324 states and 359 transitions. [2021-05-02 19:41:49,459 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 5 states have call successors, (16) [2021-05-02 19:41:49,460 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 359 transitions. [2021-05-02 19:41:49,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-05-02 19:41:49,460 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:41:49,460 INFO L523 BasicCegarLoop]: trace histogram [28, 27, 27, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:41:49,675 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-02 19:41:49,676 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:41:49,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:41:49,676 INFO L82 PathProgramCache]: Analyzing trace with hash 2011105538, now seen corresponding path program 7 times [2021-05-02 19:41:49,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:41:49,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644437047] [2021-05-02 19:41:49,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:41:49,682 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:41:49,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [706490919] [2021-05-02 19:41:49,682 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:41:49,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:41:49,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 19:41:49,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:41:49,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:49,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:49,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:49,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:49,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:49,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:49,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:49,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:49,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:49,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:49,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:49,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:49,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:49,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:49,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:49,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:49,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:49,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:49,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:49,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:49,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:49,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:49,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:49,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:49,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:49,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:49,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:50,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:50,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:50,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1590 backedges. 59 proven. 1391 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2021-05-02 19:41:50,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:41:50,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644437047] [2021-05-02 19:41:50,036 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:41:50,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706490919] [2021-05-02 19:41:50,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706490919] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:41:50,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:41:50,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 19:41:50,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787118561] [2021-05-02 19:41:50,037 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 19:41:50,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:41:50,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 19:41:50,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-02 19:41:50,037 INFO L87 Difference]: Start difference. First operand 324 states and 359 transitions. Second operand has 12 states, 12 states have (on average 5.75) internal successors, (69), 11 states have internal predecessors, (69), 11 states have call successors, (31), 11 states have call predecessors, (31), 9 states have return successors, (29), 9 states have call predecessors, (29), 10 states have call successors, (29) [2021-05-02 19:41:50,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:41:50,274 INFO L93 Difference]: Finished difference Result 338 states and 373 transitions. [2021-05-02 19:41:50,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 19:41:50,275 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.75) internal successors, (69), 11 states have internal predecessors, (69), 11 states have call successors, (31), 11 states have call predecessors, (31), 9 states have return successors, (29), 9 states have call predecessors, (29), 10 states have call successors, (29) Word has length 186 [2021-05-02 19:41:50,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:41:50,276 INFO L225 Difference]: With dead ends: 338 [2021-05-02 19:41:50,276 INFO L226 Difference]: Without dead ends: 338 [2021-05-02 19:41:50,276 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 102.5ms TimeCoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2021-05-02 19:41:50,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-05-02 19:41:50,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 330. [2021-05-02 19:41:50,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 215 states have (on average 1.0465116279069768) internal successors, (225), 218 states have internal predecessors, (225), 71 states have call successors, (71), 45 states have call predecessors, (71), 43 states have return successors, (69), 66 states have call predecessors, (69), 69 states have call successors, (69) [2021-05-02 19:41:50,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 365 transitions. [2021-05-02 19:41:50,281 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 365 transitions. Word has length 186 [2021-05-02 19:41:50,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:41:50,282 INFO L480 AbstractCegarLoop]: Abstraction has 330 states and 365 transitions. [2021-05-02 19:41:50,282 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.75) internal successors, (69), 11 states have internal predecessors, (69), 11 states have call successors, (31), 11 states have call predecessors, (31), 9 states have return successors, (29), 9 states have call predecessors, (29), 10 states have call successors, (29) [2021-05-02 19:41:50,282 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 365 transitions. [2021-05-02 19:41:50,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2021-05-02 19:41:50,283 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:41:50,283 INFO L523 BasicCegarLoop]: trace histogram [31, 30, 30, 7, 7, 7, 7, 7, 7, 7, 7, 5, 5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:41:50,499 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-02 19:41:50,499 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:41:50,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:41:50,499 INFO L82 PathProgramCache]: Analyzing trace with hash -1344678430, now seen corresponding path program 6 times [2021-05-02 19:41:50,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:41:50,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122386803] [2021-05-02 19:41:50,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:41:50,507 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:41:50,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1616099072] [2021-05-02 19:41:50,507 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:41:50,595 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-05-02 19:41:50,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:41:50,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-02 19:41:50,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:41:50,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:50,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:50,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:50,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:50,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:50,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:50,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:50,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:50,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1956 backedges. 287 proven. 191 refuted. 0 times theorem prover too weak. 1478 trivial. 0 not checked. [2021-05-02 19:41:50,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:41:50,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122386803] [2021-05-02 19:41:50,923 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:41:50,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616099072] [2021-05-02 19:41:50,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616099072] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:41:50,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:41:50,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 19:41:50,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832444682] [2021-05-02 19:41:50,923 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 19:41:50,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:41:50,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 19:41:50,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-05-02 19:41:50,924 INFO L87 Difference]: Start difference. First operand 330 states and 365 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (19), 4 states have call predecessors, (19), 6 states have call successors, (19) [2021-05-02 19:41:57,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:41:57,209 INFO L93 Difference]: Finished difference Result 353 states and 383 transitions. [2021-05-02 19:41:57,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 19:41:57,209 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (19), 4 states have call predecessors, (19), 6 states have call successors, (19) Word has length 202 [2021-05-02 19:41:57,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:41:57,211 INFO L225 Difference]: With dead ends: 353 [2021-05-02 19:41:57,211 INFO L226 Difference]: Without dead ends: 347 [2021-05-02 19:41:57,211 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 190 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 145.3ms TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-05-02 19:41:57,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-05-02 19:41:57,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 346. [2021-05-02 19:41:57,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 227 states have (on average 1.0352422907488987) internal successors, (235), 230 states have internal predecessors, (235), 71 states have call successors, (71), 49 states have call predecessors, (71), 47 states have return successors, (69), 66 states have call predecessors, (69), 69 states have call successors, (69) [2021-05-02 19:41:57,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 375 transitions. [2021-05-02 19:41:57,216 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 375 transitions. Word has length 202 [2021-05-02 19:41:57,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:41:57,217 INFO L480 AbstractCegarLoop]: Abstraction has 346 states and 375 transitions. [2021-05-02 19:41:57,217 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (19), 4 states have call predecessors, (19), 6 states have call successors, (19) [2021-05-02 19:41:57,217 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 375 transitions. [2021-05-02 19:41:57,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-05-02 19:41:57,218 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:41:57,218 INFO L523 BasicCegarLoop]: trace histogram [32, 31, 31, 8, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:41:57,435 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-02 19:41:57,435 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:41:57,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:41:57,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1224029721, now seen corresponding path program 8 times [2021-05-02 19:41:57,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:41:57,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841863500] [2021-05-02 19:41:57,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:41:57,441 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:41:57,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1595500613] [2021-05-02 19:41:57,441 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:41:57,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 19:41:57,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:41:57,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-02 19:41:57,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:41:57,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:57,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:58,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:58,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:58,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:58,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:58,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:58,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:58,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:58,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:58,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:58,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:58,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:58,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:58,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:58,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:58,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:58,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:58,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:58,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:58,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:58,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:58,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:58,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:58,063 INFO L134 CoverageAnalysis]: Checked inductivity of 2102 backedges. 214 proven. 146 refuted. 0 times theorem prover too weak. 1742 trivial. 0 not checked. [2021-05-02 19:41:58,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:41:58,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841863500] [2021-05-02 19:41:58,064 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:41:58,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595500613] [2021-05-02 19:41:58,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595500613] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:41:58,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:41:58,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 19:41:58,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252291583] [2021-05-02 19:41:58,064 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 19:41:58,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:41:58,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 19:41:58,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-05-02 19:41:58,065 INFO L87 Difference]: Start difference. First operand 346 states and 375 transitions. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 10 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (33), 10 states have call predecessors, (33), 10 states have call successors, (33) [2021-05-02 19:41:58,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:41:58,652 INFO L93 Difference]: Finished difference Result 424 states and 485 transitions. [2021-05-02 19:41:58,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 19:41:58,653 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 10 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (33), 10 states have call predecessors, (33), 10 states have call successors, (33) Word has length 210 [2021-05-02 19:41:58,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:41:58,655 INFO L225 Difference]: With dead ends: 424 [2021-05-02 19:41:58,655 INFO L226 Difference]: Without dead ends: 424 [2021-05-02 19:41:58,655 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 293.8ms TimeCoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2021-05-02 19:41:58,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-05-02 19:41:58,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 390. [2021-05-02 19:41:58,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 250 states have (on average 1.056) internal successors, (264), 253 states have internal predecessors, (264), 92 states have call successors, (92), 49 states have call predecessors, (92), 47 states have return successors, (90), 87 states have call predecessors, (90), 90 states have call successors, (90) [2021-05-02 19:41:58,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 446 transitions. [2021-05-02 19:41:58,663 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 446 transitions. Word has length 210 [2021-05-02 19:41:58,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:41:58,663 INFO L480 AbstractCegarLoop]: Abstraction has 390 states and 446 transitions. [2021-05-02 19:41:58,663 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 10 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (33), 10 states have call predecessors, (33), 10 states have call successors, (33) [2021-05-02 19:41:58,663 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 446 transitions. [2021-05-02 19:41:58,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-05-02 19:41:58,664 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:41:58,664 INFO L523 BasicCegarLoop]: trace histogram [32, 31, 31, 8, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:41:58,880 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:41:58,880 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:41:58,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:41:58,880 INFO L82 PathProgramCache]: Analyzing trace with hash -1125291239, now seen corresponding path program 9 times [2021-05-02 19:41:58,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:41:58,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492880287] [2021-05-02 19:41:58,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:41:58,886 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:41:58,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1854059637] [2021-05-02 19:41:58,886 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:41:58,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-02 19:41:58,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:41:58,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 54 conjunts are in the unsatisfiable core [2021-05-02 19:41:58,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:41:59,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:41:59,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:42:08,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:42:08,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:42:08,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:42:11,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:42:13,087 INFO L134 CoverageAnalysis]: Checked inductivity of 2102 backedges. 358 proven. 157 refuted. 0 times theorem prover too weak. 1587 trivial. 0 not checked. [2021-05-02 19:42:13,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:42:13,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492880287] [2021-05-02 19:42:13,087 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:42:13,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854059637] [2021-05-02 19:42:13,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854059637] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:42:13,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:42:13,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 19:42:13,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807904581] [2021-05-02 19:42:13,088 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 19:42:13,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:42:13,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 19:42:13,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=121, Unknown=4, NotChecked=0, Total=156 [2021-05-02 19:42:13,088 INFO L87 Difference]: Start difference. First operand 390 states and 446 transitions. Second operand has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 7 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 5 states have call predecessors, (21), 6 states have call successors, (21) [2021-05-02 19:42:39,852 WARN L205 SmtUtils]: Spent 8.07 s on a formula simplification. DAG size of input: 27 DAG size of output: 22 [2021-05-02 19:43:53,223 WARN L205 SmtUtils]: Spent 36.91 s on a formula simplification. DAG size of input: 43 DAG size of output: 35 [2021-05-02 19:44:35,541 WARN L205 SmtUtils]: Spent 36.12 s on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-05-02 19:45:18,434 WARN L205 SmtUtils]: Spent 34.64 s on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-05-02 19:46:19,103 WARN L205 SmtUtils]: Spent 42.48 s on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-05-02 19:46:40,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:46:40,247 INFO L93 Difference]: Finished difference Result 522 states and 647 transitions. [2021-05-02 19:46:40,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 19:46:40,248 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 7 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 5 states have call predecessors, (21), 6 states have call successors, (21) Word has length 210 [2021-05-02 19:46:40,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:46:40,250 INFO L225 Difference]: With dead ends: 522 [2021-05-02 19:46:40,250 INFO L226 Difference]: Without dead ends: 516 [2021-05-02 19:46:40,250 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 197 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 204684.0ms TimeCoverageRelationStatistics Valid=117, Invalid=413, Unknown=22, NotChecked=0, Total=552 [2021-05-02 19:46:40,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2021-05-02 19:46:40,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 436. [2021-05-02 19:46:40,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 273 states have (on average 1.0622710622710623) internal successors, (290), 277 states have internal predecessors, (290), 113 states have call successors, (113), 51 states have call predecessors, (113), 49 states have return successors, (111), 107 states have call predecessors, (111), 111 states have call successors, (111) [2021-05-02 19:46:40,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 514 transitions. [2021-05-02 19:46:40,259 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 514 transitions. Word has length 210 [2021-05-02 19:46:40,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:46:40,259 INFO L480 AbstractCegarLoop]: Abstraction has 436 states and 514 transitions. [2021-05-02 19:46:40,259 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 7 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 5 states have call predecessors, (21), 6 states have call successors, (21) [2021-05-02 19:46:40,259 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 514 transitions. [2021-05-02 19:46:40,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2021-05-02 19:46:40,261 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:46:40,261 INFO L523 BasicCegarLoop]: trace histogram [37, 36, 36, 9, 8, 8, 8, 8, 8, 8, 8, 6, 6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:46:40,476 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:46:40,476 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:46:40,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:46:40,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1541434116, now seen corresponding path program 10 times [2021-05-02 19:46:40,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:46:40,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044432638] [2021-05-02 19:46:40,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:46:40,483 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:46:40,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1740652520] [2021-05-02 19:46:40,483 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:46:40,562 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 19:46:40,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:46:40,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 70 conjunts are in the unsatisfiable core [2021-05-02 19:46:40,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:46:40,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:40,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:40,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:40,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:40,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:40,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:40,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:40,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:40,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:40,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:40,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:40,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:40,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:40,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:40,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:40,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:40,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:40,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:40,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:40,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:40,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:40,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:40,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:40,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:40,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:40,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:40,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:40,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:40,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:40,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:40,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:40,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:40,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:40,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:40,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:40,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:40,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:40,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:40,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:40,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:40,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:40,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:40,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:40,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:40,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:40,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:41,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:41,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:41,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:41,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:41,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:41,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:41,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:41,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:41,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:41,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:41,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:41,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:41,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:41,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:41,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:41,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:41,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:41,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:41,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:41,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:41,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:41,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:41,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:41,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:41,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:41,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:41,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:41,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:41,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:41,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:41,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:41,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:41,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:41,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:41,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:41,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:41,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:41,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:41,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:41,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:41,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:41,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:41,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:41,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:41,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:41,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:41,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:41,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:41,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:41,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:41,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:41,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:41,958 INFO L134 CoverageAnalysis]: Checked inductivity of 2830 backedges. 83 proven. 332 refuted. 0 times theorem prover too weak. 2415 trivial. 0 not checked. [2021-05-02 19:46:41,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:46:41,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044432638] [2021-05-02 19:46:41,959 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:46:41,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740652520] [2021-05-02 19:46:41,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740652520] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:46:41,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:46:41,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2021-05-02 19:46:41,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492093970] [2021-05-02 19:46:41,960 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-02 19:46:41,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:46:41,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-02 19:46:41,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-05-02 19:46:41,960 INFO L87 Difference]: Start difference. First operand 436 states and 514 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 23 states have internal predecessors, (62), 15 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (38), 15 states have call predecessors, (38), 14 states have call successors, (38) [2021-05-02 19:46:43,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:46:43,710 INFO L93 Difference]: Finished difference Result 500 states and 578 transitions. [2021-05-02 19:46:43,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-02 19:46:43,711 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 23 states have internal predecessors, (62), 15 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (38), 15 states have call predecessors, (38), 14 states have call successors, (38) Word has length 242 [2021-05-02 19:46:43,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:46:43,713 INFO L225 Difference]: With dead ends: 500 [2021-05-02 19:46:43,713 INFO L226 Difference]: Without dead ends: 394 [2021-05-02 19:46:43,713 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 797.2ms TimeCoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2021-05-02 19:46:43,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-05-02 19:46:43,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 394. [2021-05-02 19:46:43,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 247 states have (on average 1.0647773279352226) internal successors, (263), 250 states have internal predecessors, (263), 101 states have call successors, (101), 47 states have call predecessors, (101), 45 states have return successors, (99), 96 states have call predecessors, (99), 99 states have call successors, (99) [2021-05-02 19:46:43,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 463 transitions. [2021-05-02 19:46:43,720 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 463 transitions. Word has length 242 [2021-05-02 19:46:43,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:46:43,720 INFO L480 AbstractCegarLoop]: Abstraction has 394 states and 463 transitions. [2021-05-02 19:46:43,720 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 23 states have internal predecessors, (62), 15 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (38), 15 states have call predecessors, (38), 14 states have call successors, (38) [2021-05-02 19:46:43,720 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 463 transitions. [2021-05-02 19:46:43,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2021-05-02 19:46:43,721 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:46:43,721 INFO L523 BasicCegarLoop]: trace histogram [41, 40, 40, 10, 9, 9, 9, 9, 9, 9, 9, 7, 7, 7, 7, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:46:43,922 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-05-02 19:46:43,922 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:46:43,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:46:43,922 INFO L82 PathProgramCache]: Analyzing trace with hash 716020763, now seen corresponding path program 11 times [2021-05-02 19:46:43,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:46:43,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847067882] [2021-05-02 19:46:43,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:46:43,927 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:46:43,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1053082353] [2021-05-02 19:46:43,927 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:46:44,080 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-05-02 19:46:44,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:46:44,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-02 19:46:44,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:46:44,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:44,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:44,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:44,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:44,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:44,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:44,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:44,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:44,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:44,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:44,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:44,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:44,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:44,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:44,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:44,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:44,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:44,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:44,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:44,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:44,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:44,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:44,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:44,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:44,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:44,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:44,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:44,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:44,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:44,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:44,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:44,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:44,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:44,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:44,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:44,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:44,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:44,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:44,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:44,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:44,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:46:44,699 INFO L134 CoverageAnalysis]: Checked inductivity of 3500 backedges. 88 proven. 3208 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2021-05-02 19:46:44,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:46:44,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847067882] [2021-05-02 19:46:44,706 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:46:44,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053082353] [2021-05-02 19:46:44,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053082353] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:46:44,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:46:44,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-02 19:46:44,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773081354] [2021-05-02 19:46:44,721 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 19:46:44,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:46:44,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 19:46:44,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-05-02 19:46:44,722 INFO L87 Difference]: Start difference. First operand 394 states and 463 transitions. Second operand has 16 states, 16 states have (on average 6.0) internal successors, (96), 15 states have internal predecessors, (96), 15 states have call successors, (44), 15 states have call predecessors, (44), 13 states have return successors, (42), 13 states have call predecessors, (42), 14 states have call successors, (42) [2021-05-02 19:46:45,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:46:45,466 INFO L93 Difference]: Finished difference Result 741 states and 877 transitions. [2021-05-02 19:46:45,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-02 19:46:45,467 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 6.0) internal successors, (96), 15 states have internal predecessors, (96), 15 states have call successors, (44), 15 states have call predecessors, (44), 13 states have return successors, (42), 13 states have call predecessors, (42), 14 states have call successors, (42) Word has length 266 [2021-05-02 19:46:45,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:46:45,469 INFO L225 Difference]: With dead ends: 741 [2021-05-02 19:46:45,469 INFO L226 Difference]: Without dead ends: 741 [2021-05-02 19:46:45,470 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 369.0ms TimeCoverageRelationStatistics Valid=261, Invalid=441, Unknown=0, NotChecked=0, Total=702 [2021-05-02 19:46:45,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2021-05-02 19:46:45,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 705. [2021-05-02 19:46:45,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 705 states, 440 states have (on average 1.059090909090909) internal successors, (466), 448 states have internal predecessors, (466), 188 states have call successors, (188), 78 states have call predecessors, (188), 76 states have return successors, (186), 178 states have call predecessors, (186), 186 states have call successors, (186) [2021-05-02 19:46:45,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 705 states to 705 states and 840 transitions. [2021-05-02 19:46:45,481 INFO L78 Accepts]: Start accepts. Automaton has 705 states and 840 transitions. Word has length 266 [2021-05-02 19:46:45,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:46:45,481 INFO L480 AbstractCegarLoop]: Abstraction has 705 states and 840 transitions. [2021-05-02 19:46:45,481 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 6.0) internal successors, (96), 15 states have internal predecessors, (96), 15 states have call successors, (44), 15 states have call predecessors, (44), 13 states have return successors, (42), 13 states have call predecessors, (42), 14 states have call successors, (42) [2021-05-02 19:46:45,481 INFO L276 IsEmpty]: Start isEmpty. Operand 705 states and 840 transitions. [2021-05-02 19:46:45,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2021-05-02 19:46:45,483 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:46:45,483 INFO L523 BasicCegarLoop]: trace histogram [45, 44, 44, 11, 10, 10, 10, 10, 10, 10, 10, 8, 8, 8, 8, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:46:45,684 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-05-02 19:46:45,684 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:46:45,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:46:45,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1766699470, now seen corresponding path program 12 times [2021-05-02 19:46:45,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:46:45,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778336329] [2021-05-02 19:46:45,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:46:45,689 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:46:45,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1275924955] [2021-05-02 19:46:45,689 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true