/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/egcd2-ll_unwindbound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 08:13:08,333 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 08:13:08,350 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 08:13:08,406 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 08:13:08,407 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 08:13:08,409 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 08:13:08,426 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 08:13:08,431 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 08:13:08,433 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 08:13:08,437 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 08:13:08,438 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 08:13:08,440 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 08:13:08,440 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 08:13:08,442 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 08:13:08,443 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 08:13:08,444 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 08:13:08,447 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 08:13:08,447 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 08:13:08,449 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 08:13:08,465 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 08:13:08,467 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 08:13:08,468 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 08:13:08,469 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 08:13:08,471 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 08:13:08,477 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 08:13:08,493 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 08:13:08,494 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 08:13:08,495 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 08:13:08,503 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 08:13:08,541 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 08:13:08,542 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 08:13:08,545 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 08:13:08,545 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 08:13:08,545 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 08:13:08,545 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 08:13:08,545 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 08:13:08,546 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 08:13:08,546 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 08:13:08,546 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 08:13:08,546 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 08:13:08,547 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 08:13:08,547 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 08:13:08,547 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 08:13:08,547 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 08:13:08,547 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 08:13:08,548 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 08:13:08,548 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 08:13:08,548 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 08:13:08,548 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 08:13:08,548 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 08:13:08,549 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 08:13:08,549 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 08:13:09,082 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 08:13:09,108 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 08:13:09,118 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 08:13:09,120 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 08:13:09,129 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 08:13:09,130 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_unwindbound10.c [2021-05-06 08:13:09,229 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5718791c2/e8e5b210cb12462d9d1254740f92f999/FLAG52e17227a [2021-05-06 08:13:09,933 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 08:13:09,941 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_unwindbound10.c [2021-05-06 08:13:09,948 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5718791c2/e8e5b210cb12462d9d1254740f92f999/FLAG52e17227a [2021-05-06 08:13:10,324 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5718791c2/e8e5b210cb12462d9d1254740f92f999 [2021-05-06 08:13:10,326 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 08:13:10,328 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 08:13:10,355 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 08:13:10,355 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 08:13:10,359 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 08:13:10,360 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:13:10" (1/1) ... [2021-05-06 08:13:10,361 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7960df16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:13:10, skipping insertion in model container [2021-05-06 08:13:10,361 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:13:10" (1/1) ... [2021-05-06 08:13:10,377 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 08:13:10,409 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 08:13:10,645 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/egcd2-ll_unwindbound10.c[490,503] [2021-05-06 08:13:10,661 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:13:10,668 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 08:13:10,699 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/egcd2-ll_unwindbound10.c[490,503] [2021-05-06 08:13:10,747 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:13:10,803 INFO L208 MainTranslator]: Completed translation [2021-05-06 08:13:10,804 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:13:10 WrapperNode [2021-05-06 08:13:10,804 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 08:13:10,805 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 08:13:10,805 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 08:13:10,806 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 08:13:10,824 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:13:10" (1/1) ... [2021-05-06 08:13:10,824 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:13:10" (1/1) ... [2021-05-06 08:13:10,861 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:13:10" (1/1) ... [2021-05-06 08:13:10,861 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:13:10" (1/1) ... [2021-05-06 08:13:10,889 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:13:10" (1/1) ... [2021-05-06 08:13:10,914 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:13:10" (1/1) ... [2021-05-06 08:13:10,916 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:13:10" (1/1) ... [2021-05-06 08:13:10,917 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 08:13:10,918 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 08:13:10,918 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 08:13:10,918 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 08:13:10,919 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:13:10" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 08:13:11,038 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 08:13:11,038 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 08:13:11,038 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 08:13:11,039 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 08:13:11,039 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 08:13:11,039 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 08:13:11,039 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 08:13:11,039 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 08:13:11,039 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 08:13:11,039 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 08:13:11,039 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 08:13:11,039 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 08:13:11,039 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 08:13:11,040 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 08:13:11,040 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 08:13:11,040 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 08:13:11,040 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 08:13:11,040 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 08:13:11,040 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 08:13:11,040 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 08:13:11,394 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 08:13:11,394 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 08:13:11,396 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:13:11 BoogieIcfgContainer [2021-05-06 08:13:11,396 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 08:13:11,400 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 08:13:11,400 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 08:13:11,401 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 08:13:11,403 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:13:11" (1/1) ... [2021-05-06 08:13:11,424 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:13:11 BasicIcfg [2021-05-06 08:13:11,427 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 08:13:11,438 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 08:13:11,439 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 08:13:11,450 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 08:13:11,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 08:13:10" (1/4) ... [2021-05-06 08:13:11,452 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42efe1be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:13:11, skipping insertion in model container [2021-05-06 08:13:11,452 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:13:10" (2/4) ... [2021-05-06 08:13:11,453 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42efe1be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:13:11, skipping insertion in model container [2021-05-06 08:13:11,453 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:13:11" (3/4) ... [2021-05-06 08:13:11,455 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42efe1be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 08:13:11, skipping insertion in model container [2021-05-06 08:13:11,455 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:13:11" (4/4) ... [2021-05-06 08:13:11,456 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_unwindbound10.cJordan [2021-05-06 08:13:11,461 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 08:13:11,465 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 08:13:11,479 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 08:13:11,513 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 08:13:11,513 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 08:13:11,513 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 08:13:11,513 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 08:13:11,513 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 08:13:11,514 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 08:13:11,514 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 08:13:11,514 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 08:13:11,528 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 23 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 08:13:11,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-06 08:13:11,538 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:13:11,539 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:13:11,540 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:13:11,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:13:11,545 INFO L82 PathProgramCache]: Analyzing trace with hash -282167495, now seen corresponding path program 1 times [2021-05-06 08:13:11,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:13:11,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173943813] [2021-05-06 08:13:11,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:13:11,709 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:13:11,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [981525332] [2021-05-06 08:13:11,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:13:11,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:13:11,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 1 conjunts are in the unsatisfiable core [2021-05-06 08:13:11,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:13:11,969 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 08:13:11,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:13:11,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173943813] [2021-05-06 08:13:11,970 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:13:11,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981525332] [2021-05-06 08:13:11,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981525332] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:13:11,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:13:11,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-06 08:13:11,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879844888] [2021-05-06 08:13:11,975 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-05-06 08:13:11,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:13:11,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-05-06 08:13:11,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-05-06 08:13:11,987 INFO L87 Difference]: Start difference. First operand has 39 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 23 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-06 08:13:11,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:13:11,999 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2021-05-06 08:13:11,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-05-06 08:13:12,000 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 32 [2021-05-06 08:13:12,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:13:12,006 INFO L225 Difference]: With dead ends: 39 [2021-05-06 08:13:12,006 INFO L226 Difference]: Without dead ends: 34 [2021-05-06 08:13:12,007 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-05-06 08:13:12,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-06 08:13:12,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-05-06 08:13:12,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 20 states have internal predecessors, (23), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 08:13:12,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2021-05-06 08:13:12,038 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 32 [2021-05-06 08:13:12,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:13:12,039 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2021-05-06 08:13:12,039 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-06 08:13:12,039 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2021-05-06 08:13:12,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 08:13:12,041 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:13:12,041 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:13:12,266 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-05-06 08:13:12,266 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:13:12,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:13:12,267 INFO L82 PathProgramCache]: Analyzing trace with hash -127828113, now seen corresponding path program 1 times [2021-05-06 08:13:12,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:13:12,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048438061] [2021-05-06 08:13:12,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:13:12,309 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:13:12,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [929259461] [2021-05-06 08:13:12,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:13:12,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:13:12,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 08:13:12,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:13:12,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:12,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:12,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:12,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:12,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:12,685 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 08:13:12,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:13:12,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048438061] [2021-05-06 08:13:12,685 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:13:12,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929259461] [2021-05-06 08:13:12,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929259461] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:13:12,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:13:12,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 08:13:12,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954851982] [2021-05-06 08:13:12,687 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 08:13:12,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:13:12,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 08:13:12,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 08:13:12,688 INFO L87 Difference]: Start difference. First operand 34 states and 45 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, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:13:12,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:13:12,704 INFO L93 Difference]: Finished difference Result 36 states and 47 transitions. [2021-05-06 08:13:12,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 08:13:12,704 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, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-06 08:13:12,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:13:12,705 INFO L225 Difference]: With dead ends: 36 [2021-05-06 08:13:12,705 INFO L226 Difference]: Without dead ends: 36 [2021-05-06 08:13:12,706 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.5ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 08:13:12,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-06 08:13:12,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-05-06 08:13:12,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 20 states have (on average 1.25) internal successors, (25), 21 states have internal predecessors, (25), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 08:13:12,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 47 transitions. [2021-05-06 08:13:12,713 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 47 transitions. Word has length 33 [2021-05-06 08:13:12,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:13:12,714 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 47 transitions. [2021-05-06 08:13:12,714 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, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:13:12,714 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 47 transitions. [2021-05-06 08:13:12,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-06 08:13:12,715 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:13:12,715 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:13:12,929 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:13:12,929 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:13:12,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:13:12,930 INFO L82 PathProgramCache]: Analyzing trace with hash 365419517, now seen corresponding path program 1 times [2021-05-06 08:13:12,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:13:12,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622707425] [2021-05-06 08:13:12,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:13:12,961 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:13:12,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1502047579] [2021-05-06 08:13:12,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:13:13,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:13:13,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:13:13,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:13:13,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:13,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:13,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:13,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:13,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:13,137 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-06 08:13:13,138 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:13:13,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622707425] [2021-05-06 08:13:13,138 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:13:13,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502047579] [2021-05-06 08:13:13,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502047579] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:13:13,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:13:13,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 08:13:13,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924920859] [2021-05-06 08:13:13,140 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:13:13,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:13:13,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:13:13,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:13:13,141 INFO L87 Difference]: Start difference. First operand 36 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:13:13,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:13:13,249 INFO L93 Difference]: Finished difference Result 45 states and 62 transitions. [2021-05-06 08:13:13,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:13:13,250 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2021-05-06 08:13:13,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:13:13,254 INFO L225 Difference]: With dead ends: 45 [2021-05-06 08:13:13,255 INFO L226 Difference]: Without dead ends: 45 [2021-05-06 08:13:13,255 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 35.3ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:13:13,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-06 08:13:13,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 37. [2021-05-06 08:13:13,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 22 states have internal predecessors, (26), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 08:13:13,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2021-05-06 08:13:13,277 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 34 [2021-05-06 08:13:13,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:13:13,278 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2021-05-06 08:13:13,278 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:13:13,278 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2021-05-06 08:13:13,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-06 08:13:13,281 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:13:13,281 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:13:13,505 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:13:13,505 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:13:13,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:13:13,506 INFO L82 PathProgramCache]: Analyzing trace with hash 196514290, now seen corresponding path program 1 times [2021-05-06 08:13:13,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:13:13,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672374992] [2021-05-06 08:13:13,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:13:13,540 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:13:13,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1426369507] [2021-05-06 08:13:13,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:13:13,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:13:13,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 08:13:13,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:13:14,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:14,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:14,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:14,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:14,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:14,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:14,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:14,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:14,631 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-06 08:13:14,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:13:14,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672374992] [2021-05-06 08:13:14,632 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:13:14,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426369507] [2021-05-06 08:13:14,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426369507] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:13:14,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:13:14,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:13:14,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805102818] [2021-05-06 08:13:14,634 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:13:14,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:13:14,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:13:14,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:13:14,635 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:13:14,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:13:14,936 INFO L93 Difference]: Finished difference Result 57 states and 79 transitions. [2021-05-06 08:13:14,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:13:14,937 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2021-05-06 08:13:14,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:13:14,952 INFO L225 Difference]: With dead ends: 57 [2021-05-06 08:13:14,953 INFO L226 Difference]: Without dead ends: 57 [2021-05-06 08:13:14,956 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 217.3ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:13:14,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-05-06 08:13:14,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 44. [2021-05-06 08:13:14,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 28 states have internal predecessors, (32), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 08:13:14,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2021-05-06 08:13:14,967 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 56 transitions. Word has length 36 [2021-05-06 08:13:14,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:13:14,969 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 56 transitions. [2021-05-06 08:13:14,969 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:13:14,969 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 56 transitions. [2021-05-06 08:13:14,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-06 08:13:14,972 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:13:14,973 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:13:15,192 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:13:15,193 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:13:15,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:13:15,194 INFO L82 PathProgramCache]: Analyzing trace with hash 56558454, now seen corresponding path program 1 times [2021-05-06 08:13:15,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:13:15,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382689127] [2021-05-06 08:13:15,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:13:15,227 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:13:15,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [773325854] [2021-05-06 08:13:15,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:13:15,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:13:15,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:13:15,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:13:15,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:15,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:15,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:15,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:15,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:15,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:15,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:15,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:15,481 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 08:13:15,482 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:13:15,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382689127] [2021-05-06 08:13:15,482 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:13:15,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773325854] [2021-05-06 08:13:15,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773325854] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:13:15,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:13:15,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:13:15,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960156174] [2021-05-06 08:13:15,483 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:13:15,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:13:15,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:13:15,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:13:15,484 INFO L87 Difference]: Start difference. First operand 44 states and 56 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:13:15,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:13:15,538 INFO L93 Difference]: Finished difference Result 44 states and 55 transitions. [2021-05-06 08:13:15,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:13:15,540 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2021-05-06 08:13:15,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:13:15,542 INFO L225 Difference]: With dead ends: 44 [2021-05-06 08:13:15,542 INFO L226 Difference]: Without dead ends: 44 [2021-05-06 08:13:15,543 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 12.7ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:13:15,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-06 08:13:15,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-05-06 08:13:15,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 28 states have internal predecessors, (31), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 08:13:15,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 55 transitions. [2021-05-06 08:13:15,546 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 55 transitions. Word has length 39 [2021-05-06 08:13:15,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:13:15,547 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 55 transitions. [2021-05-06 08:13:15,547 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:13:15,547 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 55 transitions. [2021-05-06 08:13:15,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-06 08:13:15,547 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:13:15,547 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:13:15,774 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:13:15,775 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:13:15,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:13:15,776 INFO L82 PathProgramCache]: Analyzing trace with hash 578094295, now seen corresponding path program 1 times [2021-05-06 08:13:15,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:13:15,776 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361426936] [2021-05-06 08:13:15,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:13:15,794 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:13:15,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [764860117] [2021-05-06 08:13:15,794 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 [2021-05-06 08:13:15,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:13:15,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 08:13:15,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:13:15,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:15,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:16,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:16,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:16,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:16,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:16,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:16,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:16,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:16,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:16,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:16,175 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-06 08:13:16,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:13:16,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361426936] [2021-05-06 08:13:16,177 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:13:16,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764860117] [2021-05-06 08:13:16,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764860117] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:13:16,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:13:16,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:13:16,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382087454] [2021-05-06 08:13:16,178 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:13:16,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:13:16,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:13:16,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:13:16,179 INFO L87 Difference]: Start difference. First operand 44 states and 55 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 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) [2021-05-06 08:13:16,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:13:16,352 INFO L93 Difference]: Finished difference Result 56 states and 72 transitions. [2021-05-06 08:13:16,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:13:16,362 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 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 [2021-05-06 08:13:16,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:13:16,363 INFO L225 Difference]: With dead ends: 56 [2021-05-06 08:13:16,363 INFO L226 Difference]: Without dead ends: 56 [2021-05-06 08:13:16,363 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 98.6ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:13:16,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-06 08:13:16,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2021-05-06 08:13:16,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 32 states have (on average 1.21875) internal successors, (39), 34 states have internal predecessors, (39), 17 states have call successors, (17), 6 states have call predecessors, (17), 5 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 08:13:16,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 71 transitions. [2021-05-06 08:13:16,368 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 71 transitions. Word has length 41 [2021-05-06 08:13:16,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:13:16,368 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 71 transitions. [2021-05-06 08:13:16,368 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 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) [2021-05-06 08:13:16,368 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 71 transitions. [2021-05-06 08:13:16,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-06 08:13:16,369 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:13:16,369 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:13:16,585 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:13:16,585 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:13:16,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:13:16,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1581112078, now seen corresponding path program 1 times [2021-05-06 08:13:16,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:13:16,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204090668] [2021-05-06 08:13:16,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:13:16,628 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:13:16,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1140629294] [2021-05-06 08:13:16,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:13:16,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:13:16,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 08:13:16,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:13:16,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:16,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:16,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:16,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:16,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:16,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:16,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:16,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:16,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:16,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:16,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:16,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:17,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:17,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:17,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:17,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:17,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:17,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:17,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:17,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:17,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:17,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:17,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:17,108 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-06 08:13:17,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:13:17,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204090668] [2021-05-06 08:13:17,109 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:13:17,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140629294] [2021-05-06 08:13:17,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140629294] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:13:17,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:13:17,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:13:17,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711444771] [2021-05-06 08:13:17,110 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:13:17,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:13:17,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:13:17,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:13:17,111 INFO L87 Difference]: Start difference. First operand 55 states and 71 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 08:13:17,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:13:17,303 INFO L93 Difference]: Finished difference Result 60 states and 75 transitions. [2021-05-06 08:13:17,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:13:17,304 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2021-05-06 08:13:17,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:13:17,307 INFO L225 Difference]: With dead ends: 60 [2021-05-06 08:13:17,307 INFO L226 Difference]: Without dead ends: 60 [2021-05-06 08:13:17,308 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 63.7ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:13:17,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-06 08:13:17,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2021-05-06 08:13:17,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 35 states have (on average 1.2) internal successors, (42), 37 states have internal predecessors, (42), 17 states have call successors, (17), 7 states have call predecessors, (17), 6 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 08:13:17,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 74 transitions. [2021-05-06 08:13:17,324 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 74 transitions. Word has length 46 [2021-05-06 08:13:17,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:13:17,325 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 74 transitions. [2021-05-06 08:13:17,325 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 08:13:17,326 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 74 transitions. [2021-05-06 08:13:17,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-06 08:13:17,327 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:13:17,327 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:13:17,549 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:13:17,549 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:13:17,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:13:17,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1942645143, now seen corresponding path program 1 times [2021-05-06 08:13:17,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:13:17,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579575794] [2021-05-06 08:13:17,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:13:17,574 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:13:17,575 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [59997771] [2021-05-06 08:13:17,575 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 [2021-05-06 08:13:17,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:13:17,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-06 08:13:17,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:13:17,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:17,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:17,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:17,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:17,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:17,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:17,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:17,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:17,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:17,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:17,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:17,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:17,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:17,958 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-05-06 08:13:17,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:13:17,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579575794] [2021-05-06 08:13:17,959 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:13:17,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59997771] [2021-05-06 08:13:17,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59997771] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:13:17,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:13:17,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:13:17,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868602543] [2021-05-06 08:13:17,960 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:13:17,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:13:17,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:13:17,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:13:17,961 INFO L87 Difference]: Start difference. First operand 59 states and 74 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2021-05-06 08:13:18,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:13:18,235 INFO L93 Difference]: Finished difference Result 64 states and 78 transitions. [2021-05-06 08:13:18,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 08:13:18,236 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 51 [2021-05-06 08:13:18,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:13:18,238 INFO L225 Difference]: With dead ends: 64 [2021-05-06 08:13:18,238 INFO L226 Difference]: Without dead ends: 64 [2021-05-06 08:13:18,238 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 147.0ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:13:18,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-06 08:13:18,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2021-05-06 08:13:18,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 40 states have internal predecessors, (45), 17 states have call successors, (17), 8 states have call predecessors, (17), 7 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 08:13:18,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 77 transitions. [2021-05-06 08:13:18,250 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 77 transitions. Word has length 51 [2021-05-06 08:13:18,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:13:18,251 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 77 transitions. [2021-05-06 08:13:18,251 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2021-05-06 08:13:18,251 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 77 transitions. [2021-05-06 08:13:18,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-05-06 08:13:18,256 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:13:18,257 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:13:18,465 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-05-06 08:13:18,465 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:13:18,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:13:18,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1782154901, now seen corresponding path program 1 times [2021-05-06 08:13:18,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:13:18,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344231536] [2021-05-06 08:13:18,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:13:18,477 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:13:18,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1589859780] [2021-05-06 08:13:18,477 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 [2021-05-06 08:13:18,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:13:18,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 08:13:18,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:13:18,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:18,729 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-05-06 08:13:18,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:13:18,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344231536] [2021-05-06 08:13:18,729 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:13:18,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589859780] [2021-05-06 08:13:18,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589859780] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:13:18,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:13:18,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 08:13:18,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384074834] [2021-05-06 08:13:18,730 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:13:18,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:13:18,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:13:18,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:13:18,731 INFO L87 Difference]: Start difference. First operand 63 states and 77 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-06 08:13:18,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:13:18,812 INFO L93 Difference]: Finished difference Result 94 states and 129 transitions. [2021-05-06 08:13:18,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:13:18,813 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 59 [2021-05-06 08:13:18,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:13:18,816 INFO L225 Difference]: With dead ends: 94 [2021-05-06 08:13:18,816 INFO L226 Difference]: Without dead ends: 94 [2021-05-06 08:13:18,816 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.9ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:13:18,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-05-06 08:13:18,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 84. [2021-05-06 08:13:18,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 52 states have internal predecessors, (61), 26 states have call successors, (26), 9 states have call predecessors, (26), 8 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-06 08:13:18,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 111 transitions. [2021-05-06 08:13:18,830 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 111 transitions. Word has length 59 [2021-05-06 08:13:18,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:13:18,831 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 111 transitions. [2021-05-06 08:13:18,831 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-06 08:13:18,831 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 111 transitions. [2021-05-06 08:13:18,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-05-06 08:13:18,833 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:13:18,833 INFO L523 BasicCegarLoop]: trace histogram [5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:13:19,057 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:13:19,057 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:13:19,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:13:19,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1573186588, now seen corresponding path program 1 times [2021-05-06 08:13:19,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:13:19,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679989463] [2021-05-06 08:13:19,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:13:19,081 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:13:19,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1230143975] [2021-05-06 08:13:19,082 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 [2021-05-06 08:13:19,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:13:19,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 08:13:19,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:13:19,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:19,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:19,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:19,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:19,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:19,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:19,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:19,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:19,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:19,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:19,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:19,515 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-05-06 08:13:19,516 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:13:19,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679989463] [2021-05-06 08:13:19,516 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:13:19,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230143975] [2021-05-06 08:13:19,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230143975] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:13:19,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:13:19,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 08:13:19,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063192989] [2021-05-06 08:13:19,517 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:13:19,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:13:19,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:13:19,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:13:19,518 INFO L87 Difference]: Start difference. First operand 84 states and 111 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 08:13:19,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:13:19,572 INFO L93 Difference]: Finished difference Result 99 states and 123 transitions. [2021-05-06 08:13:19,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 08:13:19,573 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 60 [2021-05-06 08:13:19,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:13:19,576 INFO L225 Difference]: With dead ends: 99 [2021-05-06 08:13:19,577 INFO L226 Difference]: Without dead ends: 99 [2021-05-06 08:13:19,577 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 46.3ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:13:19,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-05-06 08:13:19,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2021-05-06 08:13:19,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 61 states have (on average 1.1967213114754098) internal successors, (73), 64 states have internal predecessors, (73), 26 states have call successors, (26), 12 states have call predecessors, (26), 11 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-06 08:13:19,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 123 transitions. [2021-05-06 08:13:19,585 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 123 transitions. Word has length 60 [2021-05-06 08:13:19,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:13:19,585 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 123 transitions. [2021-05-06 08:13:19,586 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 08:13:19,586 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 123 transitions. [2021-05-06 08:13:19,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-06 08:13:19,587 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:13:19,587 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:13:19,793 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:13:19,794 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:13:19,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:13:19,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1491020248, now seen corresponding path program 1 times [2021-05-06 08:13:19,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:13:19,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285531840] [2021-05-06 08:13:19,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:13:19,812 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:13:19,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1683647968] [2021-05-06 08:13:19,813 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 [2021-05-06 08:13:19,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:13:19,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 08:13:19,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:13:19,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:19,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:19,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:19,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:19,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:19,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:19,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:20,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:20,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:20,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:20,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:20,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:20,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:20,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:20,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:20,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:20,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:20,074 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-05-06 08:13:20,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:13:20,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285531840] [2021-05-06 08:13:20,075 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:13:20,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683647968] [2021-05-06 08:13:20,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683647968] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:13:20,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:13:20,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:13:20,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830253244] [2021-05-06 08:13:20,077 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:13:20,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:13:20,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:13:20,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:13:20,078 INFO L87 Difference]: Start difference. First operand 99 states and 123 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-06 08:13:20,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:13:20,250 INFO L93 Difference]: Finished difference Result 170 states and 243 transitions. [2021-05-06 08:13:20,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 08:13:20,250 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 61 [2021-05-06 08:13:20,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:13:20,252 INFO L225 Difference]: With dead ends: 170 [2021-05-06 08:13:20,252 INFO L226 Difference]: Without dead ends: 170 [2021-05-06 08:13:20,252 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 84.5ms TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:13:20,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-05-06 08:13:20,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 142. [2021-05-06 08:13:20,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 87 states have (on average 1.2873563218390804) internal successors, (112), 91 states have internal predecessors, (112), 43 states have call successors, (43), 12 states have call predecessors, (43), 11 states have return successors, (41), 38 states have call predecessors, (41), 41 states have call successors, (41) [2021-05-06 08:13:20,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 196 transitions. [2021-05-06 08:13:20,261 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 196 transitions. Word has length 61 [2021-05-06 08:13:20,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:13:20,261 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 196 transitions. [2021-05-06 08:13:20,261 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-06 08:13:20,261 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 196 transitions. [2021-05-06 08:13:20,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-05-06 08:13:20,262 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:13:20,262 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:13:20,469 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-06 08:13:20,469 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:13:20,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:13:20,470 INFO L82 PathProgramCache]: Analyzing trace with hash 1948826973, now seen corresponding path program 1 times [2021-05-06 08:13:20,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:13:20,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970707016] [2021-05-06 08:13:20,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:13:20,495 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:13:20,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1193321927] [2021-05-06 08:13:20,495 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 [2021-05-06 08:13:20,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:13:20,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 08:13:20,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:13:20,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:20,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:20,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:20,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:20,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:20,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:20,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:20,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:20,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:20,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:20,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:20,785 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-05-06 08:13:20,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:13:20,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970707016] [2021-05-06 08:13:20,785 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:13:20,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193321927] [2021-05-06 08:13:20,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193321927] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:13:20,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:13:20,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 08:13:20,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060829524] [2021-05-06 08:13:20,787 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:13:20,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:13:20,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:13:20,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:13:20,787 INFO L87 Difference]: Start difference. First operand 142 states and 196 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 08:13:20,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:13:20,848 INFO L93 Difference]: Finished difference Result 142 states and 195 transitions. [2021-05-06 08:13:20,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 08:13:20,865 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 62 [2021-05-06 08:13:20,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:13:20,866 INFO L225 Difference]: With dead ends: 142 [2021-05-06 08:13:20,866 INFO L226 Difference]: Without dead ends: 142 [2021-05-06 08:13:20,867 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 19.9ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:13:20,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-05-06 08:13:20,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2021-05-06 08:13:20,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 87 states have (on average 1.2758620689655173) internal successors, (111), 91 states have internal predecessors, (111), 43 states have call successors, (43), 12 states have call predecessors, (43), 11 states have return successors, (41), 38 states have call predecessors, (41), 41 states have call successors, (41) [2021-05-06 08:13:20,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 195 transitions. [2021-05-06 08:13:20,874 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 195 transitions. Word has length 62 [2021-05-06 08:13:20,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:13:20,874 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 195 transitions. [2021-05-06 08:13:20,874 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 08:13:20,874 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 195 transitions. [2021-05-06 08:13:20,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-06 08:13:20,875 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:13:20,875 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 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, 1, 1] [2021-05-06 08:13:21,097 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:13:21,097 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:13:21,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:13:21,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1844620331, now seen corresponding path program 1 times [2021-05-06 08:13:21,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:13:21,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210921671] [2021-05-06 08:13:21,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:13:21,106 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:13:21,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [670051518] [2021-05-06 08:13:21,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-05-06 08:13:21,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:13:21,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 08:13:21,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:13:21,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:21,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:21,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:21,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:21,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:21,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:21,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:21,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:21,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:21,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:21,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:21,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:21,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:21,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:21,476 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-05-06 08:13:21,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:13:21,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210921671] [2021-05-06 08:13:21,477 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:13:21,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670051518] [2021-05-06 08:13:21,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670051518] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:13:21,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:13:21,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:13:21,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549090586] [2021-05-06 08:13:21,478 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 08:13:21,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:13:21,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 08:13:21,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:13:21,479 INFO L87 Difference]: Start difference. First operand 142 states and 195 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 08:13:21,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:13:21,593 INFO L93 Difference]: Finished difference Result 169 states and 222 transitions. [2021-05-06 08:13:21,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:13:21,593 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 66 [2021-05-06 08:13:21,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:13:21,594 INFO L225 Difference]: With dead ends: 169 [2021-05-06 08:13:21,594 INFO L226 Difference]: Without dead ends: 169 [2021-05-06 08:13:21,595 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 54.3ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:13:21,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-05-06 08:13:21,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 167. [2021-05-06 08:13:21,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 105 states have (on average 1.2380952380952381) internal successors, (130), 108 states have internal predecessors, (130), 46 states have call successors, (46), 16 states have call predecessors, (46), 15 states have return successors, (44), 42 states have call predecessors, (44), 44 states have call successors, (44) [2021-05-06 08:13:21,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 220 transitions. [2021-05-06 08:13:21,619 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 220 transitions. Word has length 66 [2021-05-06 08:13:21,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:13:21,619 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 220 transitions. [2021-05-06 08:13:21,619 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 08:13:21,619 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 220 transitions. [2021-05-06 08:13:21,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-06 08:13:21,620 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:13:21,620 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 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] [2021-05-06 08:13:21,834 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-06 08:13:21,834 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:13:21,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:13:21,835 INFO L82 PathProgramCache]: Analyzing trace with hash 918639692, now seen corresponding path program 1 times [2021-05-06 08:13:21,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:13:21,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857298635] [2021-05-06 08:13:21,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:13:21,847 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:13:21,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1496065500] [2021-05-06 08:13:21,847 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 [2021-05-06 08:13:22,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:13:22,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-06 08:13:22,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:13:22,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:22,287 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-06 08:13:22,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:13:22,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857298635] [2021-05-06 08:13:22,288 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:13:22,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496065500] [2021-05-06 08:13:22,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496065500] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:13:22,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:13:22,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:13:22,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060207817] [2021-05-06 08:13:22,289 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:13:22,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:13:22,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:13:22,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:13:22,289 INFO L87 Difference]: Start difference. First operand 167 states and 220 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-05-06 08:13:22,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:13:22,434 INFO L93 Difference]: Finished difference Result 212 states and 294 transitions. [2021-05-06 08:13:22,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:13:22,435 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 68 [2021-05-06 08:13:22,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:13:22,438 INFO L225 Difference]: With dead ends: 212 [2021-05-06 08:13:22,438 INFO L226 Difference]: Without dead ends: 211 [2021-05-06 08:13:22,439 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 103.8ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:13:22,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-05-06 08:13:22,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 208. [2021-05-06 08:13:22,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 126 states have (on average 1.2857142857142858) internal successors, (162), 132 states have internal predecessors, (162), 65 states have call successors, (65), 17 states have call predecessors, (65), 16 states have return successors, (62), 58 states have call predecessors, (62), 62 states have call successors, (62) [2021-05-06 08:13:22,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 289 transitions. [2021-05-06 08:13:22,451 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 289 transitions. Word has length 68 [2021-05-06 08:13:22,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:13:22,452 INFO L480 AbstractCegarLoop]: Abstraction has 208 states and 289 transitions. [2021-05-06 08:13:22,452 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-05-06 08:13:22,452 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 289 transitions. [2021-05-06 08:13:22,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-05-06 08:13:22,454 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:13:22,455 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 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] [2021-05-06 08:13:22,670 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:13:22,671 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:13:22,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:13:22,671 INFO L82 PathProgramCache]: Analyzing trace with hash -210356579, now seen corresponding path program 2 times [2021-05-06 08:13:22,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:13:22,671 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301942218] [2021-05-06 08:13:22,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:13:22,679 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:13:22,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [61729514] [2021-05-06 08:13:22,679 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 [2021-05-06 08:13:22,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:13:22,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:13:22,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-06 08:13:22,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:13:22,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:22,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:22,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:22,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:22,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:22,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:22,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:22,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:22,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:22,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:22,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:22,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:22,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:22,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:22,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:22,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:22,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:22,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:22,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:22,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:22,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:22,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:22,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:22,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:22,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:22,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:22,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:23,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:23,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:23,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:23,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:23,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:23,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:23,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:23,094 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 12 proven. 17 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-05-06 08:13:23,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:13:23,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301942218] [2021-05-06 08:13:23,094 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:13:23,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61729514] [2021-05-06 08:13:23,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61729514] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:13:23,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:13:23,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 08:13:23,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541249414] [2021-05-06 08:13:23,095 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 08:13:23,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:13:23,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 08:13:23,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:13:23,096 INFO L87 Difference]: Start difference. First operand 208 states and 289 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-06 08:13:23,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:13:23,359 INFO L93 Difference]: Finished difference Result 214 states and 294 transitions. [2021-05-06 08:13:23,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 08:13:23,360 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 73 [2021-05-06 08:13:23,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:13:23,362 INFO L225 Difference]: With dead ends: 214 [2021-05-06 08:13:23,362 INFO L226 Difference]: Without dead ends: 214 [2021-05-06 08:13:23,364 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 166.5ms TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:13:23,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-05-06 08:13:23,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 212. [2021-05-06 08:13:23,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 129 states have (on average 1.2790697674418605) internal successors, (165), 135 states have internal predecessors, (165), 65 states have call successors, (65), 18 states have call predecessors, (65), 17 states have return successors, (62), 58 states have call predecessors, (62), 62 states have call successors, (62) [2021-05-06 08:13:23,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 292 transitions. [2021-05-06 08:13:23,376 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 292 transitions. Word has length 73 [2021-05-06 08:13:23,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:13:23,377 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 292 transitions. [2021-05-06 08:13:23,377 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-06 08:13:23,377 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 292 transitions. [2021-05-06 08:13:23,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-05-06 08:13:23,378 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:13:23,378 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 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] [2021-05-06 08:13:23,593 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-06 08:13:23,593 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:13:23,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:13:23,594 INFO L82 PathProgramCache]: Analyzing trace with hash 952478412, now seen corresponding path program 3 times [2021-05-06 08:13:23,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:13:23,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024423967] [2021-05-06 08:13:23,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:13:23,604 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:13:23,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1910605353] [2021-05-06 08:13:23,604 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 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 [2021-05-06 08:13:23,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 08:13:23,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:13:23,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 46 conjunts are in the unsatisfiable core [2021-05-06 08:13:23,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:13:23,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:23,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:23,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:23,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:23,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:23,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:23,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:23,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:23,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:23,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:23,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:23,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:23,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:23,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:23,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:23,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:23,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:23,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:24,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:24,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:24,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:24,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:24,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:24,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:24,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:24,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:24,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:24,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:24,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:24,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:24,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:24,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:24,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:24,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:24,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:24,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:24,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:24,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:24,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:24,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:24,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:24,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:24,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:24,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:24,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:24,184 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 31 proven. 19 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-05-06 08:13:24,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:13:24,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024423967] [2021-05-06 08:13:24,185 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:13:24,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910605353] [2021-05-06 08:13:24,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910605353] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:13:24,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:13:24,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-06 08:13:24,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915971899] [2021-05-06 08:13:24,185 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 08:13:24,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:13:24,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 08:13:24,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:13:24,187 INFO L87 Difference]: Start difference. First operand 212 states and 292 transitions. Second operand has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 12 states have internal predecessors, (31), 6 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-06 08:13:25,024 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2021-05-06 08:13:25,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:13:25,372 INFO L93 Difference]: Finished difference Result 222 states and 300 transitions. [2021-05-06 08:13:25,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 08:13:25,397 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 12 states have internal predecessors, (31), 6 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) Word has length 78 [2021-05-06 08:13:25,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:13:25,399 INFO L225 Difference]: With dead ends: 222 [2021-05-06 08:13:25,399 INFO L226 Difference]: Without dead ends: 222 [2021-05-06 08:13:25,399 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 720.7ms TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-05-06 08:13:25,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-05-06 08:13:25,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 220. [2021-05-06 08:13:25,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 135 states have (on average 1.2666666666666666) internal successors, (171), 141 states have internal predecessors, (171), 65 states have call successors, (65), 20 states have call predecessors, (65), 19 states have return successors, (62), 58 states have call predecessors, (62), 62 states have call successors, (62) [2021-05-06 08:13:25,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 298 transitions. [2021-05-06 08:13:25,411 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 298 transitions. Word has length 78 [2021-05-06 08:13:25,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:13:25,411 INFO L480 AbstractCegarLoop]: Abstraction has 220 states and 298 transitions. [2021-05-06 08:13:25,411 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 12 states have internal predecessors, (31), 6 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-06 08:13:25,411 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 298 transitions. [2021-05-06 08:13:25,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-05-06 08:13:25,412 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:13:25,413 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 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] [2021-05-06 08:13:25,628 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-06 08:13:25,628 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:13:25,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:13:25,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1350616622, now seen corresponding path program 2 times [2021-05-06 08:13:25,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:13:25,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224275724] [2021-05-06 08:13:25,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:13:25,645 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:13:25,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1068322014] [2021-05-06 08:13:25,646 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 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 [2021-05-06 08:13:25,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:13:25,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:13:25,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-06 08:13:25,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:13:26,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:26,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:26,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:26,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:26,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:26,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:26,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:26,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:26,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:26,138 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 27 proven. 23 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2021-05-06 08:13:26,138 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:13:26,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224275724] [2021-05-06 08:13:26,138 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:13:26,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068322014] [2021-05-06 08:13:26,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068322014] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:13:26,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:13:26,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:13:26,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661423953] [2021-05-06 08:13:26,139 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:13:26,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:13:26,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:13:26,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:13:26,142 INFO L87 Difference]: Start difference. First operand 220 states and 298 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 08:13:26,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:13:26,565 INFO L93 Difference]: Finished difference Result 283 states and 405 transitions. [2021-05-06 08:13:26,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 08:13:26,566 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) Word has length 82 [2021-05-06 08:13:26,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:13:26,570 INFO L225 Difference]: With dead ends: 283 [2021-05-06 08:13:26,570 INFO L226 Difference]: Without dead ends: 283 [2021-05-06 08:13:26,570 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 94.2ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:13:26,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-05-06 08:13:26,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 253. [2021-05-06 08:13:26,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 150 states have (on average 1.2933333333333332) internal successors, (194), 157 states have internal predecessors, (194), 82 states have call successors, (82), 21 states have call predecessors, (82), 20 states have return successors, (79), 74 states have call predecessors, (79), 79 states have call successors, (79) [2021-05-06 08:13:26,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 355 transitions. [2021-05-06 08:13:26,581 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 355 transitions. Word has length 82 [2021-05-06 08:13:26,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:13:26,582 INFO L480 AbstractCegarLoop]: Abstraction has 253 states and 355 transitions. [2021-05-06 08:13:26,582 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 08:13:26,582 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 355 transitions. [2021-05-06 08:13:26,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-05-06 08:13:26,583 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:13:26,583 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:13:26,800 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-05-06 08:13:26,801 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:13:26,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:13:26,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1080401827, now seen corresponding path program 1 times [2021-05-06 08:13:26,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:13:26,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394867971] [2021-05-06 08:13:26,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:13:26,826 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:13:26,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [703138879] [2021-05-06 08:13:26,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-05-06 08:13:27,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:13:27,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 08:13:27,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:13:27,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:27,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:27,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:27,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:27,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:27,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:27,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:27,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:27,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:27,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:27,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:27,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:27,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:27,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:27,363 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 16 proven. 73 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-05-06 08:13:27,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:13:27,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394867971] [2021-05-06 08:13:27,363 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:13:27,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703138879] [2021-05-06 08:13:27,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703138879] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:13:27,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:13:27,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:13:27,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095263212] [2021-05-06 08:13:27,369 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 08:13:27,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:13:27,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 08:13:27,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:13:27,370 INFO L87 Difference]: Start difference. First operand 253 states and 355 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 08:13:27,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:13:27,484 INFO L93 Difference]: Finished difference Result 256 states and 358 transitions. [2021-05-06 08:13:27,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:13:27,484 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) Word has length 83 [2021-05-06 08:13:27,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:13:27,486 INFO L225 Difference]: With dead ends: 256 [2021-05-06 08:13:27,486 INFO L226 Difference]: Without dead ends: 256 [2021-05-06 08:13:27,486 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 50.9ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:13:27,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-05-06 08:13:27,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 256. [2021-05-06 08:13:27,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 153 states have (on average 1.2875816993464053) internal successors, (197), 160 states have internal predecessors, (197), 82 states have call successors, (82), 21 states have call predecessors, (82), 20 states have return successors, (79), 74 states have call predecessors, (79), 79 states have call successors, (79) [2021-05-06 08:13:27,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 358 transitions. [2021-05-06 08:13:27,494 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 358 transitions. Word has length 83 [2021-05-06 08:13:27,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:13:27,494 INFO L480 AbstractCegarLoop]: Abstraction has 256 states and 358 transitions. [2021-05-06 08:13:27,495 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 08:13:27,495 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 358 transitions. [2021-05-06 08:13:27,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-05-06 08:13:27,495 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:13:27,495 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 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] [2021-05-06 08:13:27,723 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-06 08:13:27,723 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:13:27,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:13:27,724 INFO L82 PathProgramCache]: Analyzing trace with hash 900405455, now seen corresponding path program 1 times [2021-05-06 08:13:27,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:13:27,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056439290] [2021-05-06 08:13:27,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:13:27,733 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:13:27,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [877736653] [2021-05-06 08:13:27,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-05-06 08:13:27,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:13:27,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-06 08:13:27,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:13:28,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:28,063 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-05-06 08:13:28,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:13:28,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056439290] [2021-05-06 08:13:28,064 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:13:28,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877736653] [2021-05-06 08:13:28,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877736653] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:13:28,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:13:28,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:13:28,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351937371] [2021-05-06 08:13:28,066 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:13:28,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:13:28,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:13:28,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:13:28,067 INFO L87 Difference]: Start difference. First operand 256 states and 358 transitions. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 08:13:28,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:13:28,463 INFO L93 Difference]: Finished difference Result 287 states and 409 transitions. [2021-05-06 08:13:28,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:13:28,464 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 84 [2021-05-06 08:13:28,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:13:28,466 INFO L225 Difference]: With dead ends: 287 [2021-05-06 08:13:28,466 INFO L226 Difference]: Without dead ends: 286 [2021-05-06 08:13:28,466 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 137.3ms TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:13:28,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-05-06 08:13:28,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 285. [2021-05-06 08:13:28,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 168 states have (on average 1.3035714285714286) internal successors, (219), 176 states have internal predecessors, (219), 95 states have call successors, (95), 22 states have call predecessors, (95), 21 states have return successors, (92), 86 states have call predecessors, (92), 92 states have call successors, (92) [2021-05-06 08:13:28,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 406 transitions. [2021-05-06 08:13:28,475 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 406 transitions. Word has length 84 [2021-05-06 08:13:28,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:13:28,476 INFO L480 AbstractCegarLoop]: Abstraction has 285 states and 406 transitions. [2021-05-06 08:13:28,476 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 08:13:28,476 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 406 transitions. [2021-05-06 08:13:28,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-06 08:13:28,477 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:13:28,477 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 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] [2021-05-06 08:13:28,678 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-06 08:13:28,679 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:13:28,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:13:28,679 INFO L82 PathProgramCache]: Analyzing trace with hash -2138218929, now seen corresponding path program 2 times [2021-05-06 08:13:28,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:13:28,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669394539] [2021-05-06 08:13:28,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:13:28,702 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:13:28,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [216761153] [2021-05-06 08:13:28,702 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 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 [2021-05-06 08:13:28,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:13:28,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:13:28,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 08:13:28,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:13:28,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:28,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:28,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:29,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:29,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:29,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:29,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:29,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:29,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:29,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:29,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:29,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:29,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:29,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:29,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:29,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:29,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:29,174 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 16 proven. 79 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-05-06 08:13:29,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:13:29,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669394539] [2021-05-06 08:13:29,175 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:13:29,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216761153] [2021-05-06 08:13:29,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216761153] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:13:29,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:13:29,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:13:29,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317325654] [2021-05-06 08:13:29,175 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:13:29,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:13:29,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:13:29,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:13:29,176 INFO L87 Difference]: Start difference. First operand 285 states and 406 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 08:13:29,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:13:29,315 INFO L93 Difference]: Finished difference Result 324 states and 442 transitions. [2021-05-06 08:13:29,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 08:13:29,315 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) Word has length 87 [2021-05-06 08:13:29,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:13:29,317 INFO L225 Difference]: With dead ends: 324 [2021-05-06 08:13:29,317 INFO L226 Difference]: Without dead ends: 324 [2021-05-06 08:13:29,317 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 121.1ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:13:29,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2021-05-06 08:13:29,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 323. [2021-05-06 08:13:29,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 196 states have (on average 1.2653061224489797) internal successors, (248), 203 states have internal predecessors, (248), 98 states have call successors, (98), 29 states have call predecessors, (98), 28 states have return successors, (95), 90 states have call predecessors, (95), 95 states have call successors, (95) [2021-05-06 08:13:29,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 441 transitions. [2021-05-06 08:13:29,340 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 441 transitions. Word has length 87 [2021-05-06 08:13:29,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:13:29,340 INFO L480 AbstractCegarLoop]: Abstraction has 323 states and 441 transitions. [2021-05-06 08:13:29,340 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 08:13:29,340 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 441 transitions. [2021-05-06 08:13:29,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-06 08:13:29,341 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:13:29,341 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 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] [2021-05-06 08:13:29,560 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-06 08:13:29,561 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:13:29,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:13:29,561 INFO L82 PathProgramCache]: Analyzing trace with hash 118626568, now seen corresponding path program 1 times [2021-05-06 08:13:29,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:13:29,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457218290] [2021-05-06 08:13:29,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:13:29,580 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:13:29,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [569292483] [2021-05-06 08:13:29,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-05-06 08:13:29,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:13:29,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 08:13:29,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:13:29,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:29,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:29,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:29,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:29,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:29,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:29,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:29,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:29,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:29,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:29,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:29,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:29,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:29,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:29,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:29,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:29,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:29,886 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 21 proven. 78 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-05-06 08:13:29,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:13:29,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457218290] [2021-05-06 08:13:29,886 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:13:29,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569292483] [2021-05-06 08:13:29,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569292483] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:13:29,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:13:29,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:13:29,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080791457] [2021-05-06 08:13:29,887 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:13:29,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:13:29,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:13:29,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:13:29,888 INFO L87 Difference]: Start difference. First operand 323 states and 441 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 08:13:30,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:13:30,013 INFO L93 Difference]: Finished difference Result 325 states and 441 transitions. [2021-05-06 08:13:30,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 08:13:30,013 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) Word has length 89 [2021-05-06 08:13:30,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:13:30,015 INFO L225 Difference]: With dead ends: 325 [2021-05-06 08:13:30,015 INFO L226 Difference]: Without dead ends: 325 [2021-05-06 08:13:30,015 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 43.4ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:13:30,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-05-06 08:13:30,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 325. [2021-05-06 08:13:30,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 198 states have (on average 1.2525252525252526) internal successors, (248), 205 states have internal predecessors, (248), 98 states have call successors, (98), 29 states have call predecessors, (98), 28 states have return successors, (95), 90 states have call predecessors, (95), 95 states have call successors, (95) [2021-05-06 08:13:30,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 441 transitions. [2021-05-06 08:13:30,027 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 441 transitions. Word has length 89 [2021-05-06 08:13:30,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:13:30,028 INFO L480 AbstractCegarLoop]: Abstraction has 325 states and 441 transitions. [2021-05-06 08:13:30,028 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 08:13:30,028 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 441 transitions. [2021-05-06 08:13:30,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-05-06 08:13:30,029 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:13:30,029 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2021-05-06 08:13:30,232 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-06 08:13:30,233 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:13:30,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:13:30,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1881160278, now seen corresponding path program 2 times [2021-05-06 08:13:30,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:13:30,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189312869] [2021-05-06 08:13:30,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:13:30,241 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:13:30,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [847133245] [2021-05-06 08:13:30,241 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 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 [2021-05-06 08:13:30,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:13:30,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:13:30,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 08:13:30,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:13:30,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:30,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:30,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:30,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:30,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:30,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:30,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:30,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:30,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:30,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:30,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:30,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:31,281 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2021-05-06 08:13:31,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:13:31,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189312869] [2021-05-06 08:13:31,281 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:13:31,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847133245] [2021-05-06 08:13:31,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847133245] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:13:31,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:13:31,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:13:31,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079083058] [2021-05-06 08:13:31,282 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:13:31,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:13:31,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:13:31,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:13:31,283 INFO L87 Difference]: Start difference. First operand 325 states and 441 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-05-06 08:13:31,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:13:31,735 INFO L93 Difference]: Finished difference Result 427 states and 611 transitions. [2021-05-06 08:13:31,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:13:31,753 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 93 [2021-05-06 08:13:31,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:13:31,756 INFO L225 Difference]: With dead ends: 427 [2021-05-06 08:13:31,756 INFO L226 Difference]: Without dead ends: 427 [2021-05-06 08:13:31,757 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 102.9ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:13:31,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-05-06 08:13:31,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 361. [2021-05-06 08:13:31,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 222 states have (on average 1.2657657657657657) internal successors, (281), 229 states have internal predecessors, (281), 110 states have call successors, (110), 29 states have call predecessors, (110), 28 states have return successors, (107), 102 states have call predecessors, (107), 107 states have call successors, (107) [2021-05-06 08:13:31,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 498 transitions. [2021-05-06 08:13:31,771 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 498 transitions. Word has length 93 [2021-05-06 08:13:31,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:13:31,771 INFO L480 AbstractCegarLoop]: Abstraction has 361 states and 498 transitions. [2021-05-06 08:13:31,771 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-05-06 08:13:31,771 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 498 transitions. [2021-05-06 08:13:31,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-05-06 08:13:31,772 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:13:31,772 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:13:31,998 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:13:31,998 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:13:31,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:13:31,999 INFO L82 PathProgramCache]: Analyzing trace with hash 653404933, now seen corresponding path program 1 times [2021-05-06 08:13:31,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:13:31,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968821398] [2021-05-06 08:13:31,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:13:32,006 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:13:32,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [684337081] [2021-05-06 08:13:32,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-05-06 08:13:32,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:13:32,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 65 conjunts are in the unsatisfiable core [2021-05-06 08:13:32,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:13:32,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:32,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:32,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:32,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:32,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:32,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:32,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:32,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:32,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:32,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:32,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:32,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:32,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:32,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:32,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:32,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:32,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:32,795 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 84 proven. 44 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2021-05-06 08:13:32,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:13:32,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968821398] [2021-05-06 08:13:32,795 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:13:32,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684337081] [2021-05-06 08:13:32,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684337081] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:13:32,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:13:32,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 08:13:32,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210778753] [2021-05-06 08:13:32,796 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 08:13:32,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:13:32,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 08:13:32,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:13:32,797 INFO L87 Difference]: Start difference. First operand 361 states and 498 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 11 states have internal predecessors, (31), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-06 08:13:33,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:13:33,413 INFO L93 Difference]: Finished difference Result 367 states and 503 transitions. [2021-05-06 08:13:33,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 08:13:33,429 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 11 states have internal predecessors, (31), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 101 [2021-05-06 08:13:33,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:13:33,431 INFO L225 Difference]: With dead ends: 367 [2021-05-06 08:13:33,431 INFO L226 Difference]: Without dead ends: 367 [2021-05-06 08:13:33,432 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 86 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 387.7ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-05-06 08:13:33,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-05-06 08:13:33,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 365. [2021-05-06 08:13:33,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 225 states have (on average 1.2622222222222221) internal successors, (284), 232 states have internal predecessors, (284), 110 states have call successors, (110), 30 states have call predecessors, (110), 29 states have return successors, (107), 102 states have call predecessors, (107), 107 states have call successors, (107) [2021-05-06 08:13:33,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 501 transitions. [2021-05-06 08:13:33,443 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 501 transitions. Word has length 101 [2021-05-06 08:13:33,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:13:33,454 INFO L480 AbstractCegarLoop]: Abstraction has 365 states and 501 transitions. [2021-05-06 08:13:33,454 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 11 states have internal predecessors, (31), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-06 08:13:33,454 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 501 transitions. [2021-05-06 08:13:33,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-05-06 08:13:33,456 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:13:33,457 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:13:33,676 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:13:33,677 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:13:33,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:13:33,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1232145013, now seen corresponding path program 3 times [2021-05-06 08:13:33,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:13:33,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374281268] [2021-05-06 08:13:33,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:13:33,683 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:13:33,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2023998389] [2021-05-06 08:13:33,683 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 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 [2021-05-06 08:13:33,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 08:13:33,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:13:33,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 08:13:33,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:13:34,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:34,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:34,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:34,028 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 64 proven. 10 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2021-05-06 08:13:34,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:13:34,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374281268] [2021-05-06 08:13:34,029 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:13:34,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023998389] [2021-05-06 08:13:34,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023998389] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:13:34,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:13:34,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:13:34,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378953738] [2021-05-06 08:13:34,030 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 08:13:34,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:13:34,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 08:13:34,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:13:34,035 INFO L87 Difference]: Start difference. First operand 365 states and 501 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-05-06 08:13:34,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:13:34,134 INFO L93 Difference]: Finished difference Result 369 states and 504 transitions. [2021-05-06 08:13:34,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 08:13:34,135 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 105 [2021-05-06 08:13:34,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:13:34,146 INFO L225 Difference]: With dead ends: 369 [2021-05-06 08:13:34,146 INFO L226 Difference]: Without dead ends: 369 [2021-05-06 08:13:34,146 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 33.9ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:13:34,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-05-06 08:13:34,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 369. [2021-05-06 08:13:34,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 228 states have (on average 1.2587719298245614) internal successors, (287), 235 states have internal predecessors, (287), 110 states have call successors, (110), 31 states have call predecessors, (110), 30 states have return successors, (107), 102 states have call predecessors, (107), 107 states have call successors, (107) [2021-05-06 08:13:34,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 504 transitions. [2021-05-06 08:13:34,179 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 504 transitions. Word has length 105 [2021-05-06 08:13:34,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:13:34,180 INFO L480 AbstractCegarLoop]: Abstraction has 369 states and 504 transitions. [2021-05-06 08:13:34,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-05-06 08:13:34,180 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 504 transitions. [2021-05-06 08:13:34,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-05-06 08:13:34,181 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:13:34,181 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:13:34,408 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:13:34,409 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:13:34,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:13:34,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1212495288, now seen corresponding path program 2 times [2021-05-06 08:13:34,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:13:34,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545748876] [2021-05-06 08:13:34,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:13:34,416 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:13:34,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2013443744] [2021-05-06 08:13:34,416 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 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 [2021-05-06 08:13:34,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:13:34,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:13:34,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-06 08:13:34,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:13:34,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:34,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:34,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:34,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:34,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:34,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:34,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:34,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:34,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:34,967 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 47 proven. 34 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2021-05-06 08:13:34,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:13:34,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545748876] [2021-05-06 08:13:34,967 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:13:34,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013443744] [2021-05-06 08:13:34,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013443744] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:13:34,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:13:34,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 08:13:34,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968037938] [2021-05-06 08:13:34,968 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 08:13:34,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:13:34,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 08:13:34,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:13:34,969 INFO L87 Difference]: Start difference. First operand 369 states and 504 transitions. Second operand has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) [2021-05-06 08:13:35,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:13:35,746 INFO L93 Difference]: Finished difference Result 401 states and 555 transitions. [2021-05-06 08:13:35,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 08:13:35,750 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) Word has length 107 [2021-05-06 08:13:35,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:13:35,752 INFO L225 Difference]: With dead ends: 401 [2021-05-06 08:13:35,752 INFO L226 Difference]: Without dead ends: 400 [2021-05-06 08:13:35,752 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 196.6ms TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-05-06 08:13:35,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-05-06 08:13:35,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 398. [2021-05-06 08:13:35,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 243 states have (on average 1.2674897119341564) internal successors, (308), 251 states have internal predecessors, (308), 123 states have call successors, (123), 32 states have call predecessors, (123), 31 states have return successors, (120), 114 states have call predecessors, (120), 120 states have call successors, (120) [2021-05-06 08:13:35,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 551 transitions. [2021-05-06 08:13:35,774 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 551 transitions. Word has length 107 [2021-05-06 08:13:35,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:13:35,775 INFO L480 AbstractCegarLoop]: Abstraction has 398 states and 551 transitions. [2021-05-06 08:13:35,775 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) [2021-05-06 08:13:35,775 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 551 transitions. [2021-05-06 08:13:35,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-05-06 08:13:35,778 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:13:35,778 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:13:35,992 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-05-06 08:13:35,992 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:13:35,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:13:35,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1392800366, now seen corresponding path program 2 times [2021-05-06 08:13:35,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:13:35,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067716927] [2021-05-06 08:13:35,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:13:35,999 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:13:35,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1497221005] [2021-05-06 08:13:35,999 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 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 [2021-05-06 08:13:36,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:13:36,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:13:36,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 08:13:36,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:13:36,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:36,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:36,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:36,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:36,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:36,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:36,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:36,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:36,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:36,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:36,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:36,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:36,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:36,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:36,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:36,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:36,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:36,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:36,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:36,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:36,393 INFO L134 CoverageAnalysis]: Checked inductivity of 341 backedges. 24 proven. 221 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-05-06 08:13:36,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:13:36,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067716927] [2021-05-06 08:13:36,393 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:13:36,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497221005] [2021-05-06 08:13:36,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497221005] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:13:36,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:13:36,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:13:36,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960617082] [2021-05-06 08:13:36,397 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:13:36,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:13:36,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:13:36,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:13:36,399 INFO L87 Difference]: Start difference. First operand 398 states and 551 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2021-05-06 08:13:36,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:13:36,584 INFO L93 Difference]: Finished difference Result 450 states and 598 transitions. [2021-05-06 08:13:36,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 08:13:36,585 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) Word has length 110 [2021-05-06 08:13:36,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:13:36,588 INFO L225 Difference]: With dead ends: 450 [2021-05-06 08:13:36,588 INFO L226 Difference]: Without dead ends: 450 [2021-05-06 08:13:36,588 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 53.6ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:13:36,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-05-06 08:13:36,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 449. [2021-05-06 08:13:36,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 280 states have (on average 1.2357142857142858) internal successors, (346), 288 states have internal predecessors, (346), 127 states have call successors, (127), 42 states have call predecessors, (127), 41 states have return successors, (124), 118 states have call predecessors, (124), 124 states have call successors, (124) [2021-05-06 08:13:36,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 597 transitions. [2021-05-06 08:13:36,618 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 597 transitions. Word has length 110 [2021-05-06 08:13:36,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:13:36,618 INFO L480 AbstractCegarLoop]: Abstraction has 449 states and 597 transitions. [2021-05-06 08:13:36,618 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2021-05-06 08:13:36,618 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 597 transitions. [2021-05-06 08:13:36,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-05-06 08:13:36,619 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:13:36,619 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:13:36,837 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:13:36,838 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:13:36,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:13:36,838 INFO L82 PathProgramCache]: Analyzing trace with hash -194014662, now seen corresponding path program 3 times [2021-05-06 08:13:36,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:13:36,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336661050] [2021-05-06 08:13:36,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:13:36,844 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:13:36,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1809538927] [2021-05-06 08:13:36,847 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 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 [2021-05-06 08:13:37,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 08:13:37,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:13:37,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:13:37,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:13:37,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:37,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:37,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:37,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:37,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:37,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:37,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:37,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:37,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:37,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:37,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:37,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:37,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:37,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:37,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:37,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:37,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:37,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:37,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:37,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:37,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:37,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:37,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:37,258 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 44 proven. 11 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2021-05-06 08:13:37,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:13:37,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336661050] [2021-05-06 08:13:37,258 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:13:37,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809538927] [2021-05-06 08:13:37,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809538927] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:13:37,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:13:37,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:13:37,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980722627] [2021-05-06 08:13:37,259 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 08:13:37,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:13:37,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 08:13:37,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:13:37,260 INFO L87 Difference]: Start difference. First operand 449 states and 597 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 4 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-05-06 08:13:37,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:13:37,642 INFO L93 Difference]: Finished difference Result 625 states and 889 transitions. [2021-05-06 08:13:37,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 08:13:37,642 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 4 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 111 [2021-05-06 08:13:37,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:13:37,645 INFO L225 Difference]: With dead ends: 625 [2021-05-06 08:13:37,645 INFO L226 Difference]: Without dead ends: 625 [2021-05-06 08:13:37,645 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 157.2ms TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-05-06 08:13:37,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2021-05-06 08:13:37,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 488. [2021-05-06 08:13:37,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 307 states have (on average 1.250814332247557) internal successors, (384), 315 states have internal predecessors, (384), 139 states have call successors, (139), 42 states have call predecessors, (139), 41 states have return successors, (136), 130 states have call predecessors, (136), 136 states have call successors, (136) [2021-05-06 08:13:37,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 659 transitions. [2021-05-06 08:13:37,669 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 659 transitions. Word has length 111 [2021-05-06 08:13:37,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:13:37,669 INFO L480 AbstractCegarLoop]: Abstraction has 488 states and 659 transitions. [2021-05-06 08:13:37,669 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 4 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-05-06 08:13:37,669 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 659 transitions. [2021-05-06 08:13:37,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-05-06 08:13:37,670 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:13:37,670 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:13:37,898 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-05-06 08:13:37,898 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:13:37,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:13:37,898 INFO L82 PathProgramCache]: Analyzing trace with hash -793672821, now seen corresponding path program 2 times [2021-05-06 08:13:37,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:13:37,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454950118] [2021-05-06 08:13:37,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:13:37,906 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:13:37,907 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [807051167] [2021-05-06 08:13:37,907 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 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 [2021-05-06 08:13:38,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:13:38,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:13:38,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 08:13:38,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:13:38,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:38,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:38,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:38,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:38,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:38,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:38,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:38,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:38,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:38,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:38,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:38,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:38,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:38,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:38,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:38,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:38,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:38,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:38,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:38,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:38,338 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 29 proven. 222 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-05-06 08:13:38,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:13:38,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454950118] [2021-05-06 08:13:38,353 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:13:38,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807051167] [2021-05-06 08:13:38,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807051167] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:13:38,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:13:38,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:13:38,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985953505] [2021-05-06 08:13:38,354 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:13:38,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:13:38,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:13:38,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:13:38,355 INFO L87 Difference]: Start difference. First operand 488 states and 659 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2021-05-06 08:13:38,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:13:38,521 INFO L93 Difference]: Finished difference Result 490 states and 658 transitions. [2021-05-06 08:13:38,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 08:13:38,521 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) Word has length 112 [2021-05-06 08:13:38,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:13:38,539 INFO L225 Difference]: With dead ends: 490 [2021-05-06 08:13:38,539 INFO L226 Difference]: Without dead ends: 490 [2021-05-06 08:13:38,540 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 70.1ms TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:13:38,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-05-06 08:13:38,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 490. [2021-05-06 08:13:38,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 309 states have (on average 1.2394822006472492) internal successors, (383), 317 states have internal predecessors, (383), 139 states have call successors, (139), 42 states have call predecessors, (139), 41 states have return successors, (136), 130 states have call predecessors, (136), 136 states have call successors, (136) [2021-05-06 08:13:38,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 658 transitions. [2021-05-06 08:13:38,564 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 658 transitions. Word has length 112 [2021-05-06 08:13:38,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:13:38,564 INFO L480 AbstractCegarLoop]: Abstraction has 490 states and 658 transitions. [2021-05-06 08:13:38,564 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2021-05-06 08:13:38,564 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 658 transitions. [2021-05-06 08:13:38,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-05-06 08:13:38,565 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:13:38,565 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 4, 3, 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, 1, 1, 1, 1] [2021-05-06 08:13:38,793 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:13:38,793 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:13:38,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:13:38,794 INFO L82 PathProgramCache]: Analyzing trace with hash 791718745, now seen corresponding path program 3 times [2021-05-06 08:13:38,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:13:38,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553196109] [2021-05-06 08:13:38,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:13:38,799 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:13:38,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1085775718] [2021-05-06 08:13:38,799 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 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 [2021-05-06 08:13:38,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 08:13:38,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:13:38,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 08:13:38,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:13:38,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:38,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:39,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:39,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:39,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:39,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:39,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:39,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:39,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:39,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:39,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:39,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:39,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:39,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:39,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:39,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:39,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:39,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:39,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:39,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:39,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:39,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:39,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:39,246 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 32 proven. 229 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-05-06 08:13:39,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:13:39,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553196109] [2021-05-06 08:13:39,246 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:13:39,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085775718] [2021-05-06 08:13:39,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085775718] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:13:39,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:13:39,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:13:39,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828911010] [2021-05-06 08:13:39,247 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:13:39,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:13:39,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:13:39,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:13:39,248 INFO L87 Difference]: Start difference. First operand 490 states and 658 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2021-05-06 08:13:39,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:13:39,462 INFO L93 Difference]: Finished difference Result 570 states and 733 transitions. [2021-05-06 08:13:39,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 08:13:39,463 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) Word has length 116 [2021-05-06 08:13:39,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:13:39,468 INFO L225 Difference]: With dead ends: 570 [2021-05-06 08:13:39,468 INFO L226 Difference]: Without dead ends: 570 [2021-05-06 08:13:39,469 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 91.8ms TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:13:39,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-05-06 08:13:39,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 562. [2021-05-06 08:13:39,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 562 states, 360 states have (on average 1.211111111111111) internal successors, (436), 368 states have internal predecessors, (436), 147 states have call successors, (147), 55 states have call predecessors, (147), 54 states have return successors, (143), 138 states have call predecessors, (143), 143 states have call successors, (143) [2021-05-06 08:13:39,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 726 transitions. [2021-05-06 08:13:39,482 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 726 transitions. Word has length 116 [2021-05-06 08:13:39,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:13:39,482 INFO L480 AbstractCegarLoop]: Abstraction has 562 states and 726 transitions. [2021-05-06 08:13:39,483 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2021-05-06 08:13:39,483 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 726 transitions. [2021-05-06 08:13:39,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-05-06 08:13:39,483 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:13:39,484 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:13:39,716 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-05-06 08:13:39,716 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:13:39,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:13:39,716 INFO L82 PathProgramCache]: Analyzing trace with hash -1602469894, now seen corresponding path program 2 times [2021-05-06 08:13:39,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:13:39,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419935637] [2021-05-06 08:13:39,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:13:39,737 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:13:39,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1094896741] [2021-05-06 08:13:39,738 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 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 [2021-05-06 08:13:39,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:13:39,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:13:39,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 08:13:39,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:13:40,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:40,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:40,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:40,332 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 78 proven. 7 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2021-05-06 08:13:40,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:13:40,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419935637] [2021-05-06 08:13:40,332 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:13:40,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094896741] [2021-05-06 08:13:40,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094896741] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:13:40,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:13:40,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:13:40,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939492348] [2021-05-06 08:13:40,333 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:13:40,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:13:40,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:13:40,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:13:40,334 INFO L87 Difference]: Start difference. First operand 562 states and 726 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 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) [2021-05-06 08:13:40,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:13:40,646 INFO L93 Difference]: Finished difference Result 591 states and 766 transitions. [2021-05-06 08:13:40,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:13:40,661 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 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 118 [2021-05-06 08:13:40,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:13:40,665 INFO L225 Difference]: With dead ends: 591 [2021-05-06 08:13:40,665 INFO L226 Difference]: Without dead ends: 590 [2021-05-06 08:13:40,666 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 139.0ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:13:40,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2021-05-06 08:13:40,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 586. [2021-05-06 08:13:40,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 379 states have (on average 1.2189973614775726) internal successors, (462), 389 states have internal predecessors, (462), 151 states have call successors, (151), 56 states have call predecessors, (151), 55 states have return successors, (147), 140 states have call predecessors, (147), 147 states have call successors, (147) [2021-05-06 08:13:40,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 760 transitions. [2021-05-06 08:13:40,679 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 760 transitions. Word has length 118 [2021-05-06 08:13:40,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:13:40,679 INFO L480 AbstractCegarLoop]: Abstraction has 586 states and 760 transitions. [2021-05-06 08:13:40,680 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 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) [2021-05-06 08:13:40,692 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 760 transitions. [2021-05-06 08:13:40,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-05-06 08:13:40,693 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:13:40,694 INFO L523 BasicCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:13:40,912 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:13:40,913 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:13:40,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:13:40,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1178507345, now seen corresponding path program 3 times [2021-05-06 08:13:40,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:13:40,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351505817] [2021-05-06 08:13:40,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:13:40,920 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:13:40,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [853253775] [2021-05-06 08:13:40,920 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 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 [2021-05-06 08:13:41,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 08:13:41,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:13:41,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 53 conjunts are in the unsatisfiable core [2021-05-06 08:13:41,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:13:41,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:41,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:41,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:41,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:41,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:41,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:41,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:41,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:41,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:41,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:41,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:41,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:41,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:41,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:41,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:41,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:41,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:41,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:41,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:41,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:41,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:41,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:41,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:41,485 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 28 proven. 46 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2021-05-06 08:13:41,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:13:41,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351505817] [2021-05-06 08:13:41,486 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:13:41,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853253775] [2021-05-06 08:13:41,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853253775] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:13:41,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:13:41,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 08:13:41,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100637181] [2021-05-06 08:13:41,487 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 08:13:41,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:13:41,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 08:13:41,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:13:41,487 INFO L87 Difference]: Start difference. First operand 586 states and 760 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 6 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2021-05-06 08:13:42,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:13:42,222 INFO L93 Difference]: Finished difference Result 638 states and 824 transitions. [2021-05-06 08:13:42,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:13:42,223 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 6 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) Word has length 123 [2021-05-06 08:13:42,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:13:42,225 INFO L225 Difference]: With dead ends: 638 [2021-05-06 08:13:42,225 INFO L226 Difference]: Without dead ends: 638 [2021-05-06 08:13:42,225 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 326.5ms TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-05-06 08:13:42,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2021-05-06 08:13:42,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 632. [2021-05-06 08:13:42,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 632 states, 406 states have (on average 1.2167487684729064) internal successors, (494), 417 states have internal predecessors, (494), 164 states have call successors, (164), 62 states have call predecessors, (164), 61 states have return successors, (160), 152 states have call predecessors, (160), 160 states have call successors, (160) [2021-05-06 08:13:42,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 818 transitions. [2021-05-06 08:13:42,238 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 818 transitions. Word has length 123 [2021-05-06 08:13:42,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:13:42,239 INFO L480 AbstractCegarLoop]: Abstraction has 632 states and 818 transitions. [2021-05-06 08:13:42,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 6 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2021-05-06 08:13:42,239 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 818 transitions. [2021-05-06 08:13:42,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-05-06 08:13:42,240 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:13:42,240 INFO L523 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:13:42,464 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-05-06 08:13:42,464 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:13:42,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:13:42,465 INFO L82 PathProgramCache]: Analyzing trace with hash -351372628, now seen corresponding path program 4 times [2021-05-06 08:13:42,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:13:42,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325828872] [2021-05-06 08:13:42,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:13:42,470 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:13:42,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [189400251] [2021-05-06 08:13:42,470 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 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 [2021-05-06 08:13:42,897 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:13:42,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:13:42,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 54 conjunts are in the unsatisfiable core [2021-05-06 08:13:42,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:13:43,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:43,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:43,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:43,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:43,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:43,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:43,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:43,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:43,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:43,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:43,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:43,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:43,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:43,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:43,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:43,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:43,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:43,689 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 91 proven. 59 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2021-05-06 08:13:43,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:13:43,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325828872] [2021-05-06 08:13:43,689 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:13:43,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189400251] [2021-05-06 08:13:43,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189400251] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:13:43,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:13:43,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 08:13:43,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219483560] [2021-05-06 08:13:43,691 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 08:13:43,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:13:43,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 08:13:43,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-05-06 08:13:43,691 INFO L87 Difference]: Start difference. First operand 632 states and 818 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 12 states have internal predecessors, (34), 7 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 6 states have call predecessors, (20), 7 states have call successors, (20) [2021-05-06 08:13:44,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:13:44,436 INFO L93 Difference]: Finished difference Result 643 states and 827 transitions. [2021-05-06 08:13:44,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 08:13:44,436 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 12 states have internal predecessors, (34), 7 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 6 states have call predecessors, (20), 7 states have call successors, (20) Word has length 124 [2021-05-06 08:13:44,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:13:44,439 INFO L225 Difference]: With dead ends: 643 [2021-05-06 08:13:44,439 INFO L226 Difference]: Without dead ends: 641 [2021-05-06 08:13:44,439 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 428.2ms TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-05-06 08:13:44,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2021-05-06 08:13:44,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 638. [2021-05-06 08:13:44,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 638 states, 411 states have (on average 1.2116788321167884) internal successors, (498), 421 states have internal predecessors, (498), 164 states have call successors, (164), 64 states have call predecessors, (164), 62 states have return successors, (160), 152 states have call predecessors, (160), 160 states have call successors, (160) [2021-05-06 08:13:44,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 822 transitions. [2021-05-06 08:13:44,453 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 822 transitions. Word has length 124 [2021-05-06 08:13:44,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:13:44,453 INFO L480 AbstractCegarLoop]: Abstraction has 638 states and 822 transitions. [2021-05-06 08:13:44,453 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 12 states have internal predecessors, (34), 7 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 6 states have call predecessors, (20), 7 states have call successors, (20) [2021-05-06 08:13:44,454 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 822 transitions. [2021-05-06 08:13:44,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-05-06 08:13:44,454 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:13:44,455 INFO L523 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:13:44,668 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-05-06 08:13:44,669 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:13:44,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:13:44,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1703433466, now seen corresponding path program 5 times [2021-05-06 08:13:44,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:13:44,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592361242] [2021-05-06 08:13:44,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:13:44,675 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:13:44,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [865804604] [2021-05-06 08:13:44,676 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 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 [2021-05-06 08:13:44,770 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-06 08:13:44,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:13:44,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 70 conjunts are in the unsatisfiable core [2021-05-06 08:13:44,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:13:44,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:44,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:44,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:44,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:44,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:44,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:45,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:45,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:45,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:45,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:45,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:45,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:45,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:45,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:45,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:45,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:45,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:45,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:45,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:45,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:45,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:45,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:45,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:45,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:45,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:45,255 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 91 proven. 138 refuted. 0 times theorem prover too weak. 294 trivial. 0 not checked. [2021-05-06 08:13:45,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:13:45,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592361242] [2021-05-06 08:13:45,255 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:13:45,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865804604] [2021-05-06 08:13:45,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865804604] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:13:45,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:13:45,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 08:13:45,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754387510] [2021-05-06 08:13:45,256 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 08:13:45,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:13:45,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 08:13:45,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-05-06 08:13:45,257 INFO L87 Difference]: Start difference. First operand 638 states and 822 transitions. Second operand has 14 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 8 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) [2021-05-06 08:13:45,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:13:45,906 INFO L93 Difference]: Finished difference Result 648 states and 831 transitions. [2021-05-06 08:13:45,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 08:13:45,907 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 8 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) Word has length 128 [2021-05-06 08:13:45,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:13:45,909 INFO L225 Difference]: With dead ends: 648 [2021-05-06 08:13:45,909 INFO L226 Difference]: Without dead ends: 648 [2021-05-06 08:13:45,910 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 112 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 309.5ms TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-05-06 08:13:45,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2021-05-06 08:13:45,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 642. [2021-05-06 08:13:45,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 642 states, 414 states have (on average 1.210144927536232) internal successors, (501), 424 states have internal predecessors, (501), 164 states have call successors, (164), 65 states have call predecessors, (164), 63 states have return successors, (160), 152 states have call predecessors, (160), 160 states have call successors, (160) [2021-05-06 08:13:45,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 825 transitions. [2021-05-06 08:13:45,926 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 825 transitions. Word has length 128 [2021-05-06 08:13:45,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:13:45,926 INFO L480 AbstractCegarLoop]: Abstraction has 642 states and 825 transitions. [2021-05-06 08:13:45,927 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 8 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) [2021-05-06 08:13:45,927 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 825 transitions. [2021-05-06 08:13:45,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-05-06 08:13:45,928 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:13:45,928 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:13:46,144 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-05-06 08:13:46,145 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:13:46,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:13:46,145 INFO L82 PathProgramCache]: Analyzing trace with hash -2058321745, now seen corresponding path program 4 times [2021-05-06 08:13:46,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:13:46,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217906652] [2021-05-06 08:13:46,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:13:46,153 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:13:46,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [100512084] [2021-05-06 08:13:46,154 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:13:46,238 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:13:46,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:13:46,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 62 conjunts are in the unsatisfiable core [2021-05-06 08:13:46,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:13:46,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:46,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:46,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:46,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:46,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:46,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:46,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:46,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:46,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:46,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:46,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:46,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:46,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:46,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:46,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:46,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:46,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:46,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:46,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:46,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:46,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:46,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:46,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:46,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:46,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:46,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:46,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:46,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:46,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:46,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:46,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:46,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:46,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:46,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:46,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:46,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:46,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:47,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:47,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:47,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:47,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:47,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:47,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:47,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:47,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:47,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:47,386 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 92 proven. 111 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2021-05-06 08:13:47,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:13:47,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217906652] [2021-05-06 08:13:47,387 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:13:47,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100512084] [2021-05-06 08:13:47,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100512084] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:13:47,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:13:47,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-05-06 08:13:47,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131790960] [2021-05-06 08:13:47,387 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-06 08:13:47,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:13:47,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-06 08:13:47,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-05-06 08:13:47,388 INFO L87 Difference]: Start difference. First operand 642 states and 825 transitions. Second operand has 20 states, 19 states have (on average 2.0) internal successors, (38), 15 states have internal predecessors, (38), 11 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 7 states have call predecessors, (21), 10 states have call successors, (21) [2021-05-06 08:13:48,860 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2021-05-06 08:13:49,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:13:49,385 INFO L93 Difference]: Finished difference Result 676 states and 874 transitions. [2021-05-06 08:13:49,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-06 08:13:49,385 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 15 states have internal predecessors, (38), 11 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 7 states have call predecessors, (21), 10 states have call successors, (21) Word has length 130 [2021-05-06 08:13:49,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:13:49,388 INFO L225 Difference]: With dead ends: 676 [2021-05-06 08:13:49,388 INFO L226 Difference]: Without dead ends: 673 [2021-05-06 08:13:49,389 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1200.8ms TimeCoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2021-05-06 08:13:49,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2021-05-06 08:13:49,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 669. [2021-05-06 08:13:49,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 669 states, 427 states have (on average 1.2131147540983607) internal successors, (518), 438 states have internal predecessors, (518), 176 states have call successors, (176), 66 states have call predecessors, (176), 65 states have return successors, (173), 164 states have call predecessors, (173), 173 states have call successors, (173) [2021-05-06 08:13:49,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 867 transitions. [2021-05-06 08:13:49,404 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 867 transitions. Word has length 130 [2021-05-06 08:13:49,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:13:49,405 INFO L480 AbstractCegarLoop]: Abstraction has 669 states and 867 transitions. [2021-05-06 08:13:49,405 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 15 states have internal predecessors, (38), 11 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 7 states have call predecessors, (21), 10 states have call successors, (21) [2021-05-06 08:13:49,405 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 867 transitions. [2021-05-06 08:13:49,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-05-06 08:13:49,406 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:13:49,406 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-05-06 08:13:49,623 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-05-06 08:13:49,624 INFO L428 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:13:49,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:13:49,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1569660177, now seen corresponding path program 3 times [2021-05-06 08:13:49,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:13:49,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821025729] [2021-05-06 08:13:49,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:13:49,630 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:13:49,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [130354365] [2021-05-06 08:13:49,630 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:13:49,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 08:13:49,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:13:49,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 08:13:49,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:13:49,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:49,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:49,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:49,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:49,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:49,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:49,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:49,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:49,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:49,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:49,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:49,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:49,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:49,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:49,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:49,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:49,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:49,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:49,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:49,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:49,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:49,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:49,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:49,980 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 32 proven. 434 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-05-06 08:13:49,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:13:49,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821025729] [2021-05-06 08:13:49,980 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:13:49,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130354365] [2021-05-06 08:13:49,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130354365] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:13:49,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:13:49,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:13:49,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258724600] [2021-05-06 08:13:49,982 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:13:49,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:13:49,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:13:49,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:13:49,984 INFO L87 Difference]: Start difference. First operand 669 states and 867 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 7 states have call successors, (23), 7 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 6 states have call successors, (21) [2021-05-06 08:13:50,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:13:50,137 INFO L93 Difference]: Finished difference Result 678 states and 876 transitions. [2021-05-06 08:13:50,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 08:13:50,138 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 7 states have call successors, (23), 7 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 6 states have call successors, (21) Word has length 133 [2021-05-06 08:13:50,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:13:50,141 INFO L225 Difference]: With dead ends: 678 [2021-05-06 08:13:50,141 INFO L226 Difference]: Without dead ends: 678 [2021-05-06 08:13:50,141 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 69.1ms TimeCoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:13:50,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2021-05-06 08:13:50,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 678. [2021-05-06 08:13:50,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 678 states, 436 states have (on average 1.2087155963302751) internal successors, (527), 447 states have internal predecessors, (527), 176 states have call successors, (176), 66 states have call predecessors, (176), 65 states have return successors, (173), 164 states have call predecessors, (173), 173 states have call successors, (173) [2021-05-06 08:13:50,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 678 states to 678 states and 876 transitions. [2021-05-06 08:13:50,154 INFO L78 Accepts]: Start accepts. Automaton has 678 states and 876 transitions. Word has length 133 [2021-05-06 08:13:50,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:13:50,154 INFO L480 AbstractCegarLoop]: Abstraction has 678 states and 876 transitions. [2021-05-06 08:13:50,154 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 7 states have call successors, (23), 7 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 6 states have call successors, (21) [2021-05-06 08:13:50,155 INFO L276 IsEmpty]: Start isEmpty. Operand 678 states and 876 transitions. [2021-05-06 08:13:50,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-05-06 08:13:50,155 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:13:50,156 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:13:50,368 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:13:50,369 INFO L428 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:13:50,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:13:50,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1381701507, now seen corresponding path program 5 times [2021-05-06 08:13:50,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:13:50,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786810923] [2021-05-06 08:13:50,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:13:50,376 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:13:50,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [210115884] [2021-05-06 08:13:50,377 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:13:50,801 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-06 08:13:50,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:13:50,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 58 conjunts are in the unsatisfiable core [2021-05-06 08:13:50,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:13:50,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:50,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:50,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:50,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:50,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:50,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:51,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:51,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:51,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:51,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:51,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:51,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:51,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:51,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:51,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:51,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:51,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:51,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:51,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:51,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:51,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:51,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:51,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:51,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:51,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:51,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:51,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:51,363 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 32 proven. 52 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2021-05-06 08:13:51,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:13:51,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786810923] [2021-05-06 08:13:51,363 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:13:51,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210115884] [2021-05-06 08:13:51,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210115884] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:13:51,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:13:51,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 08:13:51,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865908528] [2021-05-06 08:13:51,364 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 08:13:51,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:13:51,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 08:13:51,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2021-05-06 08:13:51,365 INFO L87 Difference]: Start difference. First operand 678 states and 876 transitions. Second operand has 14 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 7 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) [2021-05-06 08:13:52,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:13:52,284 INFO L93 Difference]: Finished difference Result 719 states and 935 transitions. [2021-05-06 08:13:52,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 08:13:52,285 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 7 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) Word has length 134 [2021-05-06 08:13:52,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:13:52,288 INFO L225 Difference]: With dead ends: 719 [2021-05-06 08:13:52,288 INFO L226 Difference]: Without dead ends: 718 [2021-05-06 08:13:52,288 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 460.8ms TimeCoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-05-06 08:13:52,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2021-05-06 08:13:52,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 711. [2021-05-06 08:13:52,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 711 states, 454 states have (on average 1.2136563876651982) internal successors, (551), 466 states have internal predecessors, (551), 189 states have call successors, (189), 68 states have call predecessors, (189), 67 states have return successors, (186), 176 states have call predecessors, (186), 186 states have call successors, (186) [2021-05-06 08:13:52,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 711 states to 711 states and 926 transitions. [2021-05-06 08:13:52,303 INFO L78 Accepts]: Start accepts. Automaton has 711 states and 926 transitions. Word has length 134 [2021-05-06 08:13:52,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:13:52,304 INFO L480 AbstractCegarLoop]: Abstraction has 711 states and 926 transitions. [2021-05-06 08:13:52,304 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 7 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) [2021-05-06 08:13:52,304 INFO L276 IsEmpty]: Start isEmpty. Operand 711 states and 926 transitions. [2021-05-06 08:13:52,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-05-06 08:13:52,305 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:13:52,305 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:13:52,523 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-05-06 08:13:52,523 INFO L428 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:13:52,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:13:52,524 INFO L82 PathProgramCache]: Analyzing trace with hash 114091546, now seen corresponding path program 4 times [2021-05-06 08:13:52,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:13:52,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131179466] [2021-05-06 08:13:52,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:13:52,530 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:13:52,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [640878008] [2021-05-06 08:13:52,530 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:13:52,720 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:13:52,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:13:52,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 08:13:52,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:13:52,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:52,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:52,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:52,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:52,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:52,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:52,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:52,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:52,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:52,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:52,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:52,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:52,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:52,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:52,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:53,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:53,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:53,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:53,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:53,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:53,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:53,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:53,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:53,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:53,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:53,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:53,165 INFO L134 CoverageAnalysis]: Checked inductivity of 604 backedges. 40 proven. 444 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-05-06 08:13:53,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:13:53,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131179466] [2021-05-06 08:13:53,165 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:13:53,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640878008] [2021-05-06 08:13:53,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640878008] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:13:53,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:13:53,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 08:13:53,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863093690] [2021-05-06 08:13:53,167 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 08:13:53,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:13:53,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 08:13:53,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:13:53,168 INFO L87 Difference]: Start difference. First operand 711 states and 926 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 7 states have call successors, (23), 7 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 6 states have call successors, (21) [2021-05-06 08:13:53,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:13:53,356 INFO L93 Difference]: Finished difference Result 816 states and 1025 transitions. [2021-05-06 08:13:53,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-06 08:13:53,359 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 7 states have call successors, (23), 7 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 6 states have call successors, (21) Word has length 139 [2021-05-06 08:13:53,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:13:53,362 INFO L225 Difference]: With dead ends: 816 [2021-05-06 08:13:53,362 INFO L226 Difference]: Without dead ends: 816 [2021-05-06 08:13:53,362 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 103.2ms TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-05-06 08:13:53,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 816 states. [2021-05-06 08:13:53,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 816 to 791. [2021-05-06 08:13:53,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 791 states, 511 states have (on average 1.187866927592955) internal successors, (607), 523 states have internal predecessors, (607), 197 states have call successors, (197), 83 states have call predecessors, (197), 82 states have return successors, (193), 184 states have call predecessors, (193), 193 states have call successors, (193) [2021-05-06 08:13:53,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 997 transitions. [2021-05-06 08:13:53,378 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 997 transitions. Word has length 139 [2021-05-06 08:13:53,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:13:53,378 INFO L480 AbstractCegarLoop]: Abstraction has 791 states and 997 transitions. [2021-05-06 08:13:53,378 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 7 states have call successors, (23), 7 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 6 states have call successors, (21) [2021-05-06 08:13:53,379 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 997 transitions. [2021-05-06 08:13:53,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-05-06 08:13:53,380 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:13:53,380 INFO L523 BasicCegarLoop]: trace histogram [19, 18, 18, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:13:53,604 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-05-06 08:13:53,605 INFO L428 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:13:53,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:13:53,605 INFO L82 PathProgramCache]: Analyzing trace with hash -175935466, now seen corresponding path program 6 times [2021-05-06 08:13:53,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:13:53,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780566845] [2021-05-06 08:13:53,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:13:53,611 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:13:53,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1631326571] [2021-05-06 08:13:53,611 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:13:54,132 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-06 08:13:54,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:13:54,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 54 conjunts are in the unsatisfiable core [2021-05-06 08:13:54,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:13:54,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:54,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:54,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:54,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:54,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:54,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:54,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:54,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:54,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:54,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:54,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:54,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:54,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:54,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:54,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:54,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:54,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:54,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:54,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:54,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:54,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:54,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:54,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:54,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:54,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:54,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:54,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:54,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:54,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:54,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:54,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:54,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:54,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:54,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:54,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:54,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:54,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:54,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:54,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:54,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:54,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:54,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:54,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:54,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:54,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:54,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:54,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:54,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:54,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:54,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:54,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:54,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:54,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:54,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:54,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:54,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:54,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:54,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:54,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:54,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:54,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:54,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:54,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:54,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:54,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:54,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:54,797 INFO L134 CoverageAnalysis]: Checked inductivity of 744 backedges. 86 proven. 75 refuted. 0 times theorem prover too weak. 583 trivial. 0 not checked. [2021-05-06 08:13:54,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:13:54,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780566845] [2021-05-06 08:13:54,798 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:13:54,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631326571] [2021-05-06 08:13:54,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631326571] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:13:54,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:13:54,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-06 08:13:54,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103987543] [2021-05-06 08:13:54,798 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-06 08:13:54,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:13:54,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-06 08:13:54,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-05-06 08:13:54,799 INFO L87 Difference]: Start difference. First operand 791 states and 997 transitions. Second operand has 17 states, 16 states have (on average 2.625) internal successors, (42), 14 states have internal predecessors, (42), 7 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 7 states have call predecessors, (19), 6 states have call successors, (19) [2021-05-06 08:13:55,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:13:55,926 INFO L93 Difference]: Finished difference Result 921 states and 1194 transitions. [2021-05-06 08:13:55,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-06 08:13:55,927 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.625) internal successors, (42), 14 states have internal predecessors, (42), 7 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 7 states have call predecessors, (19), 6 states have call successors, (19) Word has length 146 [2021-05-06 08:13:55,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:13:55,931 INFO L225 Difference]: With dead ends: 921 [2021-05-06 08:13:55,931 INFO L226 Difference]: Without dead ends: 921 [2021-05-06 08:13:55,931 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 439.4ms TimeCoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-05-06 08:13:55,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921 states. [2021-05-06 08:13:55,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 905. [2021-05-06 08:13:55,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 576 states have (on average 1.2135416666666667) internal successors, (699), 592 states have internal predecessors, (699), 241 states have call successors, (241), 88 states have call predecessors, (241), 87 states have return successors, (237), 224 states have call predecessors, (237), 237 states have call successors, (237) [2021-05-06 08:13:55,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1177 transitions. [2021-05-06 08:13:55,951 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1177 transitions. Word has length 146 [2021-05-06 08:13:55,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:13:55,951 INFO L480 AbstractCegarLoop]: Abstraction has 905 states and 1177 transitions. [2021-05-06 08:13:55,951 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 2.625) internal successors, (42), 14 states have internal predecessors, (42), 7 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 7 states have call predecessors, (19), 6 states have call successors, (19) [2021-05-06 08:13:55,951 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1177 transitions. [2021-05-06 08:13:55,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-05-06 08:13:55,952 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:13:55,952 INFO L523 BasicCegarLoop]: trace histogram [20, 19, 19, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:13:56,161 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-05-06 08:13:56,161 INFO L428 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:13:56,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:13:56,162 INFO L82 PathProgramCache]: Analyzing trace with hash 663584549, now seen corresponding path program 7 times [2021-05-06 08:13:56,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:13:56,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701974638] [2021-05-06 08:13:56,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:13:56,167 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:13:56,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1223559007] [2021-05-06 08:13:56,167 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:13:56,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:13:56,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 54 conjunts are in the unsatisfiable core [2021-05-06 08:13:56,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:13:56,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:56,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:56,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:56,755 INFO L134 CoverageAnalysis]: Checked inductivity of 815 backedges. 91 proven. 70 refuted. 0 times theorem prover too weak. 654 trivial. 0 not checked. [2021-05-06 08:13:56,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:13:56,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701974638] [2021-05-06 08:13:56,756 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:13:56,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223559007] [2021-05-06 08:13:56,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223559007] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:13:56,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:13:56,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 08:13:56,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913607529] [2021-05-06 08:13:56,757 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 08:13:56,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:13:56,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 08:13:56,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:13:56,757 INFO L87 Difference]: Start difference. First operand 905 states and 1177 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 7 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 7 states have call predecessors, (24), 7 states have call successors, (24) [2021-05-06 08:13:57,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:13:57,563 INFO L93 Difference]: Finished difference Result 916 states and 1186 transitions. [2021-05-06 08:13:57,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:13:57,564 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 7 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 7 states have call predecessors, (24), 7 states have call successors, (24) Word has length 147 [2021-05-06 08:13:57,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:13:57,568 INFO L225 Difference]: With dead ends: 916 [2021-05-06 08:13:57,568 INFO L226 Difference]: Without dead ends: 914 [2021-05-06 08:13:57,568 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 337.4ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-05-06 08:13:57,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 914 states. [2021-05-06 08:13:57,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 914 to 911. [2021-05-06 08:13:57,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 911 states, 581 states have (on average 1.2099827882960412) internal successors, (703), 596 states have internal predecessors, (703), 241 states have call successors, (241), 90 states have call predecessors, (241), 88 states have return successors, (237), 224 states have call predecessors, (237), 237 states have call successors, (237) [2021-05-06 08:13:57,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 911 states to 911 states and 1181 transitions. [2021-05-06 08:13:57,587 INFO L78 Accepts]: Start accepts. Automaton has 911 states and 1181 transitions. Word has length 147 [2021-05-06 08:13:57,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:13:57,587 INFO L480 AbstractCegarLoop]: Abstraction has 911 states and 1181 transitions. [2021-05-06 08:13:57,587 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 7 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 7 states have call predecessors, (24), 7 states have call successors, (24) [2021-05-06 08:13:57,587 INFO L276 IsEmpty]: Start isEmpty. Operand 911 states and 1181 transitions. [2021-05-06 08:13:57,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-05-06 08:13:57,589 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:13:57,589 INFO L523 BasicCegarLoop]: trace histogram [20, 19, 19, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:13:57,813 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-05-06 08:13:57,813 INFO L428 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:13:57,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:13:57,814 INFO L82 PathProgramCache]: Analyzing trace with hash 286780695, now seen corresponding path program 8 times [2021-05-06 08:13:57,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:13:57,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269944332] [2021-05-06 08:13:57,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:13:57,819 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:13:57,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2086011513] [2021-05-06 08:13:57,819 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:13:57,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:13:57,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:13:57,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 51 conjunts are in the unsatisfiable core [2021-05-06 08:13:57,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:13:58,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:58,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:58,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:58,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:58,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:58,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:58,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:58,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:58,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:58,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:58,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:58,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:58,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:58,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:58,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:58,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:58,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:58,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:58,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:58,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:58,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:58,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:58,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:58,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:58,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:58,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:58,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:58,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:58,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:58,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:58,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:58,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:58,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:58,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:58,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:58,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:13:58,479 INFO L134 CoverageAnalysis]: Checked inductivity of 822 backedges. 91 proven. 77 refuted. 0 times theorem prover too weak. 654 trivial. 0 not checked. [2021-05-06 08:13:58,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:13:58,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269944332] [2021-05-06 08:13:58,480 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:13:58,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086011513] [2021-05-06 08:13:58,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086011513] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:13:58,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:13:58,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 08:13:58,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807318374] [2021-05-06 08:13:58,481 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 08:13:58,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:13:58,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 08:13:58,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-05-06 08:13:58,481 INFO L87 Difference]: Start difference. First operand 911 states and 1181 transitions. Second operand has 14 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 8 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 8 states have call predecessors, (24), 7 states have call successors, (24) [2021-05-06 08:13:59,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:13:59,444 INFO L93 Difference]: Finished difference Result 921 states and 1190 transitions. [2021-05-06 08:13:59,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 08:13:59,445 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 8 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 8 states have call predecessors, (24), 7 states have call successors, (24) Word has length 151 [2021-05-06 08:13:59,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:13:59,448 INFO L225 Difference]: With dead ends: 921 [2021-05-06 08:13:59,448 INFO L226 Difference]: Without dead ends: 921 [2021-05-06 08:13:59,449 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 334.9ms TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-05-06 08:13:59,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921 states. [2021-05-06 08:13:59,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 915. [2021-05-06 08:13:59,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 915 states, 584 states have (on average 1.2089041095890412) internal successors, (706), 599 states have internal predecessors, (706), 241 states have call successors, (241), 91 states have call predecessors, (241), 89 states have return successors, (237), 224 states have call predecessors, (237), 237 states have call successors, (237) [2021-05-06 08:13:59,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 915 states to 915 states and 1184 transitions. [2021-05-06 08:13:59,466 INFO L78 Accepts]: Start accepts. Automaton has 915 states and 1184 transitions. Word has length 151 [2021-05-06 08:13:59,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:13:59,466 INFO L480 AbstractCegarLoop]: Abstraction has 915 states and 1184 transitions. [2021-05-06 08:13:59,466 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 8 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 8 states have call predecessors, (24), 7 states have call successors, (24) [2021-05-06 08:13:59,466 INFO L276 IsEmpty]: Start isEmpty. Operand 915 states and 1184 transitions. [2021-05-06 08:13:59,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-05-06 08:13:59,468 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:13:59,468 INFO L523 BasicCegarLoop]: trace histogram [20, 19, 19, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:13:59,688 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:13:59,689 INFO L428 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:13:59,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:13:59,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1987152653, now seen corresponding path program 9 times [2021-05-06 08:13:59,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:13:59,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674387957] [2021-05-06 08:13:59,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:13:59,695 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:13:59,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [712371718] [2021-05-06 08:13:59,695 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:13:59,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 08:13:59,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:13:59,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 69 conjunts are in the unsatisfiable core [2021-05-06 08:13:59,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:14:00,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:00,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:00,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:00,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:00,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:00,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:00,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:00,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:00,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:00,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:00,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:00,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:00,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:00,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:00,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:00,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:00,589 WARN L205 SmtUtils]: Spent 333.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-05-06 08:14:01,199 WARN L205 SmtUtils]: Spent 539.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-05-06 08:14:02,235 WARN L205 SmtUtils]: Spent 822.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-05-06 08:14:02,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:02,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:02,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:02,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:02,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:02,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:03,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:03,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:03,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:03,724 INFO L134 CoverageAnalysis]: Checked inductivity of 822 backedges. 132 proven. 77 refuted. 0 times theorem prover too weak. 613 trivial. 0 not checked. [2021-05-06 08:14:03,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:14:03,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674387957] [2021-05-06 08:14:03,724 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:14:03,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712371718] [2021-05-06 08:14:03,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712371718] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:14:03,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:14:03,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-06 08:14:03,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147303245] [2021-05-06 08:14:03,725 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 08:14:03,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:14:03,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 08:14:03,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:14:03,726 INFO L87 Difference]: Start difference. First operand 915 states and 1184 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 13 states have internal predecessors, (39), 5 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 6 states have call predecessors, (20), 5 states have call successors, (20) [2021-05-06 08:14:04,904 WARN L205 SmtUtils]: Spent 535.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-05-06 08:14:09,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:14:09,526 INFO L93 Difference]: Finished difference Result 976 states and 1260 transitions. [2021-05-06 08:14:09,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 08:14:09,529 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 13 states have internal predecessors, (39), 5 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 6 states have call predecessors, (20), 5 states have call successors, (20) Word has length 151 [2021-05-06 08:14:09,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:14:09,540 INFO L225 Difference]: With dead ends: 976 [2021-05-06 08:14:09,540 INFO L226 Difference]: Without dead ends: 976 [2021-05-06 08:14:09,541 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 4029.3ms TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-05-06 08:14:09,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 976 states. [2021-05-06 08:14:09,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 976 to 963. [2021-05-06 08:14:09,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 614 states have (on average 1.210097719869707) internal successors, (743), 630 states have internal predecessors, (743), 254 states have call successors, (254), 96 states have call predecessors, (254), 94 states have return successors, (250), 236 states have call predecessors, (250), 250 states have call successors, (250) [2021-05-06 08:14:09,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 1247 transitions. [2021-05-06 08:14:09,575 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 1247 transitions. Word has length 151 [2021-05-06 08:14:09,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:14:09,576 INFO L480 AbstractCegarLoop]: Abstraction has 963 states and 1247 transitions. [2021-05-06 08:14:09,576 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 13 states have internal predecessors, (39), 5 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 6 states have call predecessors, (20), 5 states have call successors, (20) [2021-05-06 08:14:09,576 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 1247 transitions. [2021-05-06 08:14:09,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-05-06 08:14:09,577 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:14:09,592 INFO L523 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:14:09,812 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-05-06 08:14:09,813 INFO L428 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:14:09,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:14:09,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1068595608, now seen corresponding path program 6 times [2021-05-06 08:14:09,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:14:09,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137864946] [2021-05-06 08:14:09,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:14:09,819 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:14:09,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1945010083] [2021-05-06 08:14:09,819 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:14:09,935 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-06 08:14:09,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:14:09,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-06 08:14:09,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:14:10,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:10,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:10,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:10,328 INFO L134 CoverageAnalysis]: Checked inductivity of 897 backedges. 87 proven. 29 refuted. 0 times theorem prover too weak. 781 trivial. 0 not checked. [2021-05-06 08:14:10,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:14:10,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137864946] [2021-05-06 08:14:10,329 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:14:10,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945010083] [2021-05-06 08:14:10,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945010083] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:14:10,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:14:10,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:14:10,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416389954] [2021-05-06 08:14:10,330 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:14:10,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:14:10,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:14:10,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:14:10,330 INFO L87 Difference]: Start difference. First operand 963 states and 1247 transitions. Second operand has 10 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-05-06 08:14:10,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:14:10,599 INFO L93 Difference]: Finished difference Result 988 states and 1267 transitions. [2021-05-06 08:14:10,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 08:14:10,600 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 153 [2021-05-06 08:14:10,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:14:10,604 INFO L225 Difference]: With dead ends: 988 [2021-05-06 08:14:10,604 INFO L226 Difference]: Without dead ends: 984 [2021-05-06 08:14:10,604 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 106.6ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-06 08:14:10,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 984 states. [2021-05-06 08:14:10,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 984 to 976. [2021-05-06 08:14:10,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 976 states, 624 states have (on average 1.2019230769230769) internal successors, (750), 640 states have internal predecessors, (750), 253 states have call successors, (253), 99 states have call predecessors, (253), 98 states have return successors, (250), 236 states have call predecessors, (250), 250 states have call successors, (250) [2021-05-06 08:14:10,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 976 states to 976 states and 1253 transitions. [2021-05-06 08:14:10,630 INFO L78 Accepts]: Start accepts. Automaton has 976 states and 1253 transitions. Word has length 153 [2021-05-06 08:14:10,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:14:10,631 INFO L480 AbstractCegarLoop]: Abstraction has 976 states and 1253 transitions. [2021-05-06 08:14:10,631 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-05-06 08:14:10,631 INFO L276 IsEmpty]: Start isEmpty. Operand 976 states and 1253 transitions. [2021-05-06 08:14:10,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-05-06 08:14:10,632 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:14:10,633 INFO L523 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:14:10,848 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:14:10,849 INFO L428 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:14:10,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:14:10,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1784468722, now seen corresponding path program 4 times [2021-05-06 08:14:10,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:14:10,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553916423] [2021-05-06 08:14:10,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:14:10,855 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:14:10,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1152980225] [2021-05-06 08:14:10,855 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:14:11,047 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:14:11,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:14:11,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 08:14:11,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:14:11,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:11,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:11,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:11,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:11,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:11,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:11,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:11,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:11,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:11,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:11,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:11,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:11,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:11,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:11,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:11,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:11,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:11,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:11,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:11,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:11,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:11,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:11,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:11,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:11,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:11,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:11,355 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 40 proven. 718 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-05-06 08:14:11,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:14:11,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553916423] [2021-05-06 08:14:11,356 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:14:11,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152980225] [2021-05-06 08:14:11,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152980225] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:14:11,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:14:11,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 08:14:11,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512974718] [2021-05-06 08:14:11,357 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 08:14:11,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:14:11,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 08:14:11,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:14:11,358 INFO L87 Difference]: Start difference. First operand 976 states and 1253 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 8 states have call successors, (27), 8 states have call predecessors, (27), 6 states have return successors, (25), 6 states have call predecessors, (25), 7 states have call successors, (25) [2021-05-06 08:14:11,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:14:11,549 INFO L93 Difference]: Finished difference Result 988 states and 1265 transitions. [2021-05-06 08:14:11,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-06 08:14:11,553 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 8 states have call successors, (27), 8 states have call predecessors, (27), 6 states have return successors, (25), 6 states have call predecessors, (25), 7 states have call successors, (25) Word has length 156 [2021-05-06 08:14:11,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:14:11,557 INFO L225 Difference]: With dead ends: 988 [2021-05-06 08:14:11,557 INFO L226 Difference]: Without dead ends: 988 [2021-05-06 08:14:11,558 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 86.9ms TimeCoverageRelationStatistics Valid=102, Invalid=170, Unknown=0, NotChecked=0, Total=272 [2021-05-06 08:14:11,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 988 states. [2021-05-06 08:14:11,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 988 to 988. [2021-05-06 08:14:11,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 988 states, 636 states have (on average 1.1981132075471699) internal successors, (762), 652 states have internal predecessors, (762), 253 states have call successors, (253), 99 states have call predecessors, (253), 98 states have return successors, (250), 236 states have call predecessors, (250), 250 states have call successors, (250) [2021-05-06 08:14:11,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 988 states to 988 states and 1265 transitions. [2021-05-06 08:14:11,577 INFO L78 Accepts]: Start accepts. Automaton has 988 states and 1265 transitions. Word has length 156 [2021-05-06 08:14:11,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:14:11,579 INFO L480 AbstractCegarLoop]: Abstraction has 988 states and 1265 transitions. [2021-05-06 08:14:11,580 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 8 states have call successors, (27), 8 states have call predecessors, (27), 6 states have return successors, (25), 6 states have call predecessors, (25), 7 states have call successors, (25) [2021-05-06 08:14:11,580 INFO L276 IsEmpty]: Start isEmpty. Operand 988 states and 1265 transitions. [2021-05-06 08:14:11,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-05-06 08:14:11,581 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:14:11,582 INFO L523 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:14:11,799 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:14:11,799 INFO L428 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:14:11,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:14:11,800 INFO L82 PathProgramCache]: Analyzing trace with hash -482920742, now seen corresponding path program 7 times [2021-05-06 08:14:11,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:14:11,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101286816] [2021-05-06 08:14:11,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:14:11,805 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:14:11,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1530721144] [2021-05-06 08:14:11,805 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:14:11,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:14:11,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 84 conjunts are in the unsatisfiable core [2021-05-06 08:14:11,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:14:11,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:11,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:11,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:11,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:11,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:11,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:12,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:12,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:12,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:12,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:12,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:12,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:12,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:12,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:12,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:12,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:12,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:12,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:12,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:12,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:12,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:12,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:12,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:12,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:12,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:12,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:12,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:12,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:12,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:12,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:12,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:12,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:12,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:12,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:12,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:12,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:12,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:12,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:12,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:12,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:12,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:12,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:13,490 WARN L205 SmtUtils]: Spent 617.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2021-05-06 08:14:13,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:13,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:13,734 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-05-06 08:14:13,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:13,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:14,494 WARN L205 SmtUtils]: Spent 489.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2021-05-06 08:14:19,676 WARN L205 SmtUtils]: Spent 3.42 s on a formula simplification. DAG size of input: 55 DAG size of output: 37 [2021-05-06 08:14:21,692 WARN L205 SmtUtils]: Spent 1.01 s on a formula simplification that was a NOOP. DAG size: 32 [2021-05-06 08:14:21,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:21,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:21,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:21,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:21,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:21,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:21,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:21,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:21,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:21,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:21,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:21,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:21,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:21,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:21,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:22,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:22,256 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 228 proven. 93 refuted. 0 times theorem prover too weak. 583 trivial. 0 not checked. [2021-05-06 08:14:22,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:14:22,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101286816] [2021-05-06 08:14:22,257 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:14:22,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530721144] [2021-05-06 08:14:22,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530721144] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:14:22,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:14:22,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-05-06 08:14:22,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703978056] [2021-05-06 08:14:22,257 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-06 08:14:22,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:14:22,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-06 08:14:22,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-05-06 08:14:22,258 INFO L87 Difference]: Start difference. First operand 988 states and 1265 transitions. Second operand has 23 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 17 states have internal predecessors, (45), 12 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 11 states have call predecessors, (25), 11 states have call successors, (25) [2021-05-06 08:14:36,390 WARN L205 SmtUtils]: Spent 681.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 42 [2021-05-06 08:14:37,326 WARN L205 SmtUtils]: Spent 670.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 32 [2021-05-06 08:14:40,580 WARN L205 SmtUtils]: Spent 3.07 s on a formula simplification. DAG size of input: 56 DAG size of output: 39 [2021-05-06 08:14:42,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:14:42,748 INFO L93 Difference]: Finished difference Result 1029 states and 1324 transitions. [2021-05-06 08:14:42,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-06 08:14:42,749 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 17 states have internal predecessors, (45), 12 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 11 states have call predecessors, (25), 11 states have call successors, (25) Word has length 157 [2021-05-06 08:14:42,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:14:42,752 INFO L225 Difference]: With dead ends: 1029 [2021-05-06 08:14:42,752 INFO L226 Difference]: Without dead ends: 1028 [2021-05-06 08:14:42,753 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 15359.7ms TimeCoverageRelationStatistics Valid=115, Invalid=815, Unknown=0, NotChecked=0, Total=930 [2021-05-06 08:14:42,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1028 states. [2021-05-06 08:14:42,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1028 to 1021. [2021-05-06 08:14:42,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1021 states, 654 states have (on average 1.201834862385321) internal successors, (786), 671 states have internal predecessors, (786), 266 states have call successors, (266), 101 states have call predecessors, (266), 100 states have return successors, (263), 248 states have call predecessors, (263), 263 states have call successors, (263) [2021-05-06 08:14:42,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1021 states to 1021 states and 1315 transitions. [2021-05-06 08:14:42,769 INFO L78 Accepts]: Start accepts. Automaton has 1021 states and 1315 transitions. Word has length 157 [2021-05-06 08:14:42,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:14:42,770 INFO L480 AbstractCegarLoop]: Abstraction has 1021 states and 1315 transitions. [2021-05-06 08:14:42,770 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 17 states have internal predecessors, (45), 12 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 11 states have call predecessors, (25), 11 states have call successors, (25) [2021-05-06 08:14:42,770 INFO L276 IsEmpty]: Start isEmpty. Operand 1021 states and 1315 transitions. [2021-05-06 08:14:42,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-05-06 08:14:42,771 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:14:42,771 INFO L523 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:14:42,972 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-05-06 08:14:42,972 INFO L428 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:14:42,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:14:42,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1975031370, now seen corresponding path program 8 times [2021-05-06 08:14:42,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:14:42,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364821144] [2021-05-06 08:14:42,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:14:42,977 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:14:42,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1457715628] [2021-05-06 08:14:42,977 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:14:43,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:14:43,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:14:43,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 102 conjunts are in the unsatisfiable core [2021-05-06 08:14:43,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:14:43,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:43,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:43,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:43,872 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 222 proven. 171 refuted. 0 times theorem prover too weak. 511 trivial. 0 not checked. [2021-05-06 08:14:43,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:14:43,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364821144] [2021-05-06 08:14:43,873 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:14:43,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457715628] [2021-05-06 08:14:43,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457715628] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:14:43,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:14:43,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-05-06 08:14:43,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433159082] [2021-05-06 08:14:43,873 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-06 08:14:43,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:14:43,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-06 08:14:43,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-05-06 08:14:43,874 INFO L87 Difference]: Start difference. First operand 1021 states and 1315 transitions. Second operand has 19 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 10 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 11 states have call predecessors, (25), 9 states have call successors, (25) [2021-05-06 08:14:44,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:14:44,901 INFO L93 Difference]: Finished difference Result 1093 states and 1405 transitions. [2021-05-06 08:14:44,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 08:14:44,901 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 10 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 11 states have call predecessors, (25), 9 states have call successors, (25) Word has length 157 [2021-05-06 08:14:44,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:14:44,905 INFO L225 Difference]: With dead ends: 1093 [2021-05-06 08:14:44,905 INFO L226 Difference]: Without dead ends: 1092 [2021-05-06 08:14:44,906 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 136 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 564.9ms TimeCoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-05-06 08:14:44,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1092 states. [2021-05-06 08:14:44,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1092 to 1055. [2021-05-06 08:14:44,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1055 states, 678 states have (on average 1.1991150442477876) internal successors, (813), 695 states have internal predecessors, (813), 270 states have call successors, (270), 107 states have call predecessors, (270), 106 states have return successors, (267), 252 states have call predecessors, (267), 267 states have call successors, (267) [2021-05-06 08:14:44,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1055 states to 1055 states and 1350 transitions. [2021-05-06 08:14:44,923 INFO L78 Accepts]: Start accepts. Automaton has 1055 states and 1350 transitions. Word has length 157 [2021-05-06 08:14:44,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:14:44,924 INFO L480 AbstractCegarLoop]: Abstraction has 1055 states and 1350 transitions. [2021-05-06 08:14:44,924 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 states have internal predecessors, (42), 10 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 11 states have call predecessors, (25), 9 states have call successors, (25) [2021-05-06 08:14:44,924 INFO L276 IsEmpty]: Start isEmpty. Operand 1055 states and 1350 transitions. [2021-05-06 08:14:44,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-05-06 08:14:44,926 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:14:44,926 INFO L523 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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] [2021-05-06 08:14:45,151 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-05-06 08:14:45,152 INFO L428 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:14:45,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:14:45,152 INFO L82 PathProgramCache]: Analyzing trace with hash 827981760, now seen corresponding path program 5 times [2021-05-06 08:14:45,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:14:45,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211185277] [2021-05-06 08:14:45,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:14:45,157 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:14:45,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [45636907] [2021-05-06 08:14:45,157 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:14:45,465 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-06 08:14:45,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:14:45,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-06 08:14:45,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:14:45,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:45,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:45,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:45,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:45,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:45,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:45,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:45,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:45,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:45,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:45,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:45,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:45,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:45,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:45,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:45,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:45,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:45,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:45,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:45,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:45,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:45,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:45,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:45,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:45,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:45,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:45,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:45,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:45,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:45,722 INFO L134 CoverageAnalysis]: Checked inductivity of 912 backedges. 40 proven. 728 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-05-06 08:14:45,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:14:45,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211185277] [2021-05-06 08:14:45,722 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:14:45,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45636907] [2021-05-06 08:14:45,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45636907] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:14:45,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:14:45,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 08:14:45,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396014459] [2021-05-06 08:14:45,723 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 08:14:45,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:14:45,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 08:14:45,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:14:45,724 INFO L87 Difference]: Start difference. First operand 1055 states and 1350 transitions. Second operand has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 8 states have call successors, (27), 8 states have call predecessors, (27), 6 states have return successors, (25), 6 states have call predecessors, (25), 7 states have call successors, (25) [2021-05-06 08:14:45,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:14:45,954 INFO L93 Difference]: Finished difference Result 1219 states and 1514 transitions. [2021-05-06 08:14:45,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-06 08:14:45,955 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 8 states have call successors, (27), 8 states have call predecessors, (27), 6 states have return successors, (25), 6 states have call predecessors, (25), 7 states have call successors, (25) Word has length 160 [2021-05-06 08:14:45,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:14:45,959 INFO L225 Difference]: With dead ends: 1219 [2021-05-06 08:14:45,959 INFO L226 Difference]: Without dead ends: 1219 [2021-05-06 08:14:45,959 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 101.9ms TimeCoverageRelationStatistics Valid=128, Invalid=214, Unknown=0, NotChecked=0, Total=342 [2021-05-06 08:14:45,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1219 states. [2021-05-06 08:14:45,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1219 to 1184. [2021-05-06 08:14:45,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1184 states, 763 states have (on average 1.18086500655308) internal successors, (901), 781 states have internal predecessors, (901), 289 states have call successors, (289), 132 states have call predecessors, (289), 131 states have return successors, (286), 270 states have call predecessors, (286), 286 states have call successors, (286) [2021-05-06 08:14:45,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1184 states to 1184 states and 1476 transitions. [2021-05-06 08:14:45,978 INFO L78 Accepts]: Start accepts. Automaton has 1184 states and 1476 transitions. Word has length 160 [2021-05-06 08:14:45,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:14:45,978 INFO L480 AbstractCegarLoop]: Abstraction has 1184 states and 1476 transitions. [2021-05-06 08:14:45,979 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 8 states have call successors, (27), 8 states have call predecessors, (27), 6 states have return successors, (25), 6 states have call predecessors, (25), 7 states have call successors, (25) [2021-05-06 08:14:45,979 INFO L276 IsEmpty]: Start isEmpty. Operand 1184 states and 1476 transitions. [2021-05-06 08:14:45,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-05-06 08:14:45,980 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:14:45,980 INFO L523 BasicCegarLoop]: trace histogram [21, 20, 20, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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] [2021-05-06 08:14:46,186 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-05-06 08:14:46,187 INFO L428 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:14:46,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:14:46,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1220795847, now seen corresponding path program 5 times [2021-05-06 08:14:46,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:14:46,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146413391] [2021-05-06 08:14:46,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:14:46,192 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:14:46,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1749154512] [2021-05-06 08:14:46,192 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:14:46,462 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-06 08:14:46,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:14:46,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-06 08:14:46,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:14:46,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:46,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:46,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:46,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:46,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:46,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:46,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:46,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:46,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:46,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:46,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:46,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:46,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:46,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:46,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:46,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:46,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:46,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:46,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:46,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:46,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:46,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:46,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:46,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:46,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:46,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:46,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:46,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:46,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:46,703 INFO L134 CoverageAnalysis]: Checked inductivity of 922 backedges. 48 proven. 730 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-05-06 08:14:46,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:14:46,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146413391] [2021-05-06 08:14:46,704 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:14:46,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749154512] [2021-05-06 08:14:46,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749154512] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:14:46,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:14:46,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 08:14:46,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812285213] [2021-05-06 08:14:46,704 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 08:14:46,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:14:46,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 08:14:46,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:14:46,705 INFO L87 Difference]: Start difference. First operand 1184 states and 1476 transitions. Second operand has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 8 states have call successors, (27), 8 states have call predecessors, (27), 6 states have return successors, (25), 6 states have call predecessors, (25), 7 states have call successors, (25) [2021-05-06 08:14:46,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:14:46,926 INFO L93 Difference]: Finished difference Result 1212 states and 1498 transitions. [2021-05-06 08:14:46,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-06 08:14:46,926 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 8 states have call successors, (27), 8 states have call predecessors, (27), 6 states have return successors, (25), 6 states have call predecessors, (25), 7 states have call successors, (25) Word has length 162 [2021-05-06 08:14:46,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:14:46,930 INFO L225 Difference]: With dead ends: 1212 [2021-05-06 08:14:46,930 INFO L226 Difference]: Without dead ends: 1212 [2021-05-06 08:14:46,931 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 94.9ms TimeCoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2021-05-06 08:14:46,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1212 states. [2021-05-06 08:14:46,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1212 to 1204. [2021-05-06 08:14:46,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1204 states, 783 states have (on average 1.169859514687101) internal successors, (916), 799 states have internal predecessors, (916), 289 states have call successors, (289), 132 states have call predecessors, (289), 131 states have return successors, (286), 272 states have call predecessors, (286), 286 states have call successors, (286) [2021-05-06 08:14:46,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1204 states to 1204 states and 1491 transitions. [2021-05-06 08:14:46,948 INFO L78 Accepts]: Start accepts. Automaton has 1204 states and 1491 transitions. Word has length 162 [2021-05-06 08:14:46,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:14:46,948 INFO L480 AbstractCegarLoop]: Abstraction has 1204 states and 1491 transitions. [2021-05-06 08:14:46,948 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 8 states have call successors, (27), 8 states have call predecessors, (27), 6 states have return successors, (25), 6 states have call predecessors, (25), 7 states have call successors, (25) [2021-05-06 08:14:46,948 INFO L276 IsEmpty]: Start isEmpty. Operand 1204 states and 1491 transitions. [2021-05-06 08:14:46,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-05-06 08:14:46,950 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:14:46,950 INFO L523 BasicCegarLoop]: trace histogram [21, 20, 20, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:14:47,156 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:14:47,156 INFO L428 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:14:47,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:14:47,156 INFO L82 PathProgramCache]: Analyzing trace with hash 2094023431, now seen corresponding path program 6 times [2021-05-06 08:14:47,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:14:47,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109551217] [2021-05-06 08:14:47,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:14:47,162 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:14:47,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1263220750] [2021-05-06 08:14:47,163 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:14:48,162 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-05-06 08:14:48,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:14:48,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-06 08:14:48,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:14:48,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:48,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:48,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:48,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:48,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:48,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:48,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:48,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:48,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:48,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:48,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:48,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:48,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:48,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:48,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:48,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:48,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:48,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:48,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:48,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:48,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:48,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:48,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:48,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:48,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:48,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:48,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:48,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:48,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:48,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:48,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:48,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:48,496 INFO L134 CoverageAnalysis]: Checked inductivity of 936 backedges. 51 proven. 741 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-05-06 08:14:48,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:14:48,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109551217] [2021-05-06 08:14:48,497 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:14:48,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263220750] [2021-05-06 08:14:48,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263220750] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:14:48,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:14:48,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 08:14:48,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712872268] [2021-05-06 08:14:48,498 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 08:14:48,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:14:48,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 08:14:48,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:14:48,498 INFO L87 Difference]: Start difference. First operand 1204 states and 1491 transitions. Second operand has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 12 states have internal predecessors, (60), 8 states have call successors, (27), 8 states have call predecessors, (27), 6 states have return successors, (25), 6 states have call predecessors, (25), 7 states have call successors, (25) [2021-05-06 08:14:48,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:14:48,749 INFO L93 Difference]: Finished difference Result 1412 states and 1711 transitions. [2021-05-06 08:14:48,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-06 08:14:48,750 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 12 states have internal predecessors, (60), 8 states have call successors, (27), 8 states have call predecessors, (27), 6 states have return successors, (25), 6 states have call predecessors, (25), 7 states have call successors, (25) Word has length 166 [2021-05-06 08:14:48,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:14:48,754 INFO L225 Difference]: With dead ends: 1412 [2021-05-06 08:14:48,755 INFO L226 Difference]: Without dead ends: 1412 [2021-05-06 08:14:48,755 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 123.1ms TimeCoverageRelationStatistics Valid=156, Invalid=264, Unknown=0, NotChecked=0, Total=420 [2021-05-06 08:14:48,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1412 states. [2021-05-06 08:14:48,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1412 to 1390. [2021-05-06 08:14:48,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1390 states, 904 states have (on average 1.154867256637168) internal successors, (1044), 920 states have internal predecessors, (1044), 325 states have call successors, (325), 161 states have call predecessors, (325), 160 states have return successors, (321), 308 states have call predecessors, (321), 321 states have call successors, (321) [2021-05-06 08:14:48,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1390 states to 1390 states and 1690 transitions. [2021-05-06 08:14:48,776 INFO L78 Accepts]: Start accepts. Automaton has 1390 states and 1690 transitions. Word has length 166 [2021-05-06 08:14:48,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:14:48,776 INFO L480 AbstractCegarLoop]: Abstraction has 1390 states and 1690 transitions. [2021-05-06 08:14:48,776 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 12 states have internal predecessors, (60), 8 states have call successors, (27), 8 states have call predecessors, (27), 6 states have return successors, (25), 6 states have call predecessors, (25), 7 states have call successors, (25) [2021-05-06 08:14:48,776 INFO L276 IsEmpty]: Start isEmpty. Operand 1390 states and 1690 transitions. [2021-05-06 08:14:48,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-05-06 08:14:48,778 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:14:48,778 INFO L523 BasicCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:14:48,992 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:14:48,993 INFO L428 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:14:48,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:14:48,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1864794764, now seen corresponding path program 10 times [2021-05-06 08:14:48,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:14:48,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037949980] [2021-05-06 08:14:48,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:14:48,998 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:14:48,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1132108527] [2021-05-06 08:14:48,998 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:14:49,095 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:14:49,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:14:49,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 75 conjunts are in the unsatisfiable core [2021-05-06 08:14:49,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:14:49,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:49,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:49,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:49,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:49,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:49,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:49,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:49,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:49,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:49,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:49,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:49,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:49,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:49,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:49,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:49,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:49,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:49,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:49,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:49,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:49,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:49,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:49,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:49,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:49,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:49,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:49,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:49,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:49,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:49,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:49,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:49,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:49,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:49,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:49,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:49,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:49,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:49,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:49,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:49,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:49,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:49,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:49,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:49,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:49,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:49,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:49,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:49,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:49,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:49,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:49,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:49,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:49,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:49,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:49,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:49,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1185 backedges. 171 proven. 215 refuted. 0 times theorem prover too weak. 799 trivial. 0 not checked. [2021-05-06 08:14:49,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:14:49,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037949980] [2021-05-06 08:14:49,852 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:14:49,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132108527] [2021-05-06 08:14:49,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132108527] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:14:49,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:14:49,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-06 08:14:49,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522342296] [2021-05-06 08:14:49,852 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-06 08:14:49,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:14:49,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-06 08:14:49,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-05-06 08:14:49,853 INFO L87 Difference]: Start difference. First operand 1390 states and 1690 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 15 states have internal predecessors, (43), 10 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (28), 10 states have call predecessors, (28), 10 states have call successors, (28) [2021-05-06 08:14:51,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:14:51,426 INFO L93 Difference]: Finished difference Result 1413 states and 1716 transitions. [2021-05-06 08:14:51,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-06 08:14:51,426 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 15 states have internal predecessors, (43), 10 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (28), 10 states have call predecessors, (28), 10 states have call successors, (28) Word has length 170 [2021-05-06 08:14:51,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:14:51,431 INFO L225 Difference]: With dead ends: 1413 [2021-05-06 08:14:51,431 INFO L226 Difference]: Without dead ends: 1413 [2021-05-06 08:14:51,432 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 150 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 570.0ms TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-05-06 08:14:51,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1413 states. [2021-05-06 08:14:51,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1413 to 1395. [2021-05-06 08:14:51,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1395 states, 907 states have (on average 1.153252480705623) internal successors, (1046), 924 states have internal predecessors, (1046), 326 states have call successors, (326), 162 states have call predecessors, (326), 161 states have return successors, (322), 308 states have call predecessors, (322), 322 states have call successors, (322) [2021-05-06 08:14:51,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1395 states to 1395 states and 1694 transitions. [2021-05-06 08:14:51,456 INFO L78 Accepts]: Start accepts. Automaton has 1395 states and 1694 transitions. Word has length 170 [2021-05-06 08:14:51,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:14:51,457 INFO L480 AbstractCegarLoop]: Abstraction has 1395 states and 1694 transitions. [2021-05-06 08:14:51,457 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 15 states have internal predecessors, (43), 10 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (28), 10 states have call predecessors, (28), 10 states have call successors, (28) [2021-05-06 08:14:51,457 INFO L276 IsEmpty]: Start isEmpty. Operand 1395 states and 1694 transitions. [2021-05-06 08:14:51,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-05-06 08:14:51,459 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:14:51,459 INFO L523 BasicCegarLoop]: trace histogram [23, 22, 22, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:14:51,681 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:14:51,681 INFO L428 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:14:51,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:14:51,681 INFO L82 PathProgramCache]: Analyzing trace with hash 398880833, now seen corresponding path program 11 times [2021-05-06 08:14:51,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:14:51,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587039336] [2021-05-06 08:14:51,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:14:51,687 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:14:51,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1145423221] [2021-05-06 08:14:51,687 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:14:52,150 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-06 08:14:52,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:14:52,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 75 conjunts are in the unsatisfiable core [2021-05-06 08:14:52,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:14:52,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:52,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:52,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:52,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:52,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:52,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:52,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:52,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:52,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:52,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:52,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:52,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:52,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:52,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:52,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:52,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:52,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:52,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:52,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:52,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:52,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:52,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:52,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:52,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:52,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:52,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:52,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:52,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:52,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:52,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:52,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:52,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:52,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:52,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:52,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:52,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:52,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:52,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:52,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:52,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:52,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:52,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:52,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:52,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:52,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:52,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:53,086 WARN L205 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2021-05-06 08:14:53,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:53,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:53,242 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-05-06 08:14:53,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:53,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:53,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:53,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:53,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:53,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:53,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:53,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:53,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:53,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:53,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:53,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:53,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:53,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:53,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:53,497 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 85 proven. 138 refuted. 0 times theorem prover too weak. 885 trivial. 0 not checked. [2021-05-06 08:14:53,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:14:53,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587039336] [2021-05-06 08:14:53,498 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:14:53,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145423221] [2021-05-06 08:14:53,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145423221] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:14:53,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:14:53,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-06 08:14:53,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572159536] [2021-05-06 08:14:53,499 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-06 08:14:53,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:14:53,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-06 08:14:53,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-05-06 08:14:53,499 INFO L87 Difference]: Start difference. First operand 1395 states and 1694 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 16 states have internal predecessors, (48), 9 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) [2021-05-06 08:14:54,896 WARN L205 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2021-05-06 08:14:55,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:14:55,834 INFO L93 Difference]: Finished difference Result 1449 states and 1761 transitions. [2021-05-06 08:14:55,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-06 08:14:55,835 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 16 states have internal predecessors, (48), 9 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) Word has length 173 [2021-05-06 08:14:55,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:14:55,840 INFO L225 Difference]: With dead ends: 1449 [2021-05-06 08:14:55,840 INFO L226 Difference]: Without dead ends: 1449 [2021-05-06 08:14:55,840 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 1616.3ms TimeCoverageRelationStatistics Valid=86, Invalid=670, Unknown=0, NotChecked=0, Total=756 [2021-05-06 08:14:55,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1449 states. [2021-05-06 08:14:55,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1449 to 1383. [2021-05-06 08:14:55,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1383 states, 900 states have (on average 1.1522222222222223) internal successors, (1037), 918 states have internal predecessors, (1037), 323 states have call successors, (323), 160 states have call predecessors, (323), 159 states have return successors, (319), 304 states have call predecessors, (319), 319 states have call successors, (319) [2021-05-06 08:14:55,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1383 states to 1383 states and 1679 transitions. [2021-05-06 08:14:55,869 INFO L78 Accepts]: Start accepts. Automaton has 1383 states and 1679 transitions. Word has length 173 [2021-05-06 08:14:55,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:14:55,870 INFO L480 AbstractCegarLoop]: Abstraction has 1383 states and 1679 transitions. [2021-05-06 08:14:55,870 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 16 states have internal predecessors, (48), 9 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) [2021-05-06 08:14:55,870 INFO L276 IsEmpty]: Start isEmpty. Operand 1383 states and 1679 transitions. [2021-05-06 08:14:55,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-05-06 08:14:55,872 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:14:55,872 INFO L523 BasicCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:14:56,079 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:14:56,079 INFO L428 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:14:56,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:14:56,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1303020634, now seen corresponding path program 12 times [2021-05-06 08:14:56,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:14:56,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353234563] [2021-05-06 08:14:56,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:14:56,085 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:14:56,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1041646675] [2021-05-06 08:14:56,085 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:14:57,060 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-06 08:14:57,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:14:57,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 54 conjunts are in the unsatisfiable core [2021-05-06 08:14:57,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:14:57,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:57,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:57,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:57,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:57,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:57,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:57,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:57,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:57,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:57,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:57,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:57,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:57,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:57,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:57,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:57,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:57,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:57,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:57,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:57,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:57,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:57,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:57,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:57,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:57,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:57,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:57,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:57,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:57,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:57,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:57,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:57,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:57,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:57,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:57,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:57,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:57,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:57,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:57,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:57,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:57,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:57,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:57,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:57,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:57,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:57,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:57,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:57,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:57,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:57,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:57,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:57,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:57,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:57,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:57,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:57,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:57,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:57,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:57,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:57,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:57,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:58,005 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2021-05-06 08:14:58,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:58,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:58,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:14:58,062 INFO L134 CoverageAnalysis]: Checked inductivity of 1192 backedges. 132 proven. 69 refuted. 0 times theorem prover too weak. 991 trivial. 0 not checked. [2021-05-06 08:14:58,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:14:58,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353234563] [2021-05-06 08:14:58,062 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:14:58,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041646675] [2021-05-06 08:14:58,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041646675] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:14:58,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:14:58,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-06 08:14:58,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416304896] [2021-05-06 08:14:58,063 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 08:14:58,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:14:58,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 08:14:58,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:14:58,064 INFO L87 Difference]: Start difference. First operand 1383 states and 1679 transitions. Second operand has 15 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 7 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 7 states have call predecessors, (20), 6 states have call successors, (20) [2021-05-06 08:14:59,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:14:59,143 INFO L93 Difference]: Finished difference Result 1498 states and 1835 transitions. [2021-05-06 08:14:59,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 08:14:59,144 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 7 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 7 states have call predecessors, (20), 6 states have call successors, (20) Word has length 174 [2021-05-06 08:14:59,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:14:59,149 INFO L225 Difference]: With dead ends: 1498 [2021-05-06 08:14:59,149 INFO L226 Difference]: Without dead ends: 1498 [2021-05-06 08:14:59,149 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 682.5ms TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-05-06 08:14:59,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1498 states. [2021-05-06 08:14:59,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1498 to 1442. [2021-05-06 08:14:59,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1442 states, 939 states have (on average 1.1554845580404687) internal successors, (1085), 958 states have internal predecessors, (1085), 340 states have call successors, (340), 163 states have call predecessors, (340), 162 states have return successors, (336), 320 states have call predecessors, (336), 336 states have call successors, (336) [2021-05-06 08:14:59,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 1761 transitions. [2021-05-06 08:14:59,172 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 1761 transitions. Word has length 174 [2021-05-06 08:14:59,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:14:59,172 INFO L480 AbstractCegarLoop]: Abstraction has 1442 states and 1761 transitions. [2021-05-06 08:14:59,172 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 7 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 7 states have call predecessors, (20), 6 states have call successors, (20) [2021-05-06 08:14:59,172 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 1761 transitions. [2021-05-06 08:14:59,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-05-06 08:14:59,174 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:14:59,175 INFO L523 BasicCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:14:59,383 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-05-06 08:14:59,384 INFO L428 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:14:59,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:14:59,384 INFO L82 PathProgramCache]: Analyzing trace with hash 337831166, now seen corresponding path program 13 times [2021-05-06 08:14:59,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:14:59,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256583075] [2021-05-06 08:14:59,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:14:59,389 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:14:59,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [98552178] [2021-05-06 08:14:59,389 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:15:00,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:15:00,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 84 conjunts are in the unsatisfiable core [2021-05-06 08:15:00,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:15:00,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:00,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:00,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:00,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:00,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:00,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:00,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:00,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:00,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:00,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:00,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:00,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:00,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:00,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:00,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:00,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:01,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:01,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:01,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:01,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:01,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:01,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:01,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:01,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:01,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:01,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:01,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:01,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:01,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:01,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:01,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:01,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:01,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:01,592 INFO L134 CoverageAnalysis]: Checked inductivity of 1192 backedges. 211 proven. 125 refuted. 0 times theorem prover too weak. 856 trivial. 0 not checked. [2021-05-06 08:15:01,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:15:01,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256583075] [2021-05-06 08:15:01,593 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:15:01,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98552178] [2021-05-06 08:15:01,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98552178] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:15:01,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:15:01,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-06 08:15:01,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553953398] [2021-05-06 08:15:01,593 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-06 08:15:01,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:15:01,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-06 08:15:01,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2021-05-06 08:15:01,594 INFO L87 Difference]: Start difference. First operand 1442 states and 1761 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 states have internal predecessors, (44), 8 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 8 states have call predecessors, (28), 8 states have call successors, (28) [2021-05-06 08:15:03,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:15:03,326 INFO L93 Difference]: Finished difference Result 1516 states and 1848 transitions. [2021-05-06 08:15:03,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-06 08:15:03,327 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 states have internal predecessors, (44), 8 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 8 states have call predecessors, (28), 8 states have call successors, (28) Word has length 174 [2021-05-06 08:15:03,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:15:03,332 INFO L225 Difference]: With dead ends: 1516 [2021-05-06 08:15:03,332 INFO L226 Difference]: Without dead ends: 1516 [2021-05-06 08:15:03,332 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 155 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1168.8ms TimeCoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2021-05-06 08:15:03,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1516 states. [2021-05-06 08:15:03,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1516 to 1473. [2021-05-06 08:15:03,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1473 states, 957 states have (on average 1.1567398119122256) internal successors, (1107), 977 states have internal predecessors, (1107), 349 states have call successors, (349), 167 states have call predecessors, (349), 166 states have return successors, (345), 328 states have call predecessors, (345), 345 states have call successors, (345) [2021-05-06 08:15:03,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1473 states to 1473 states and 1801 transitions. [2021-05-06 08:15:03,390 INFO L78 Accepts]: Start accepts. Automaton has 1473 states and 1801 transitions. Word has length 174 [2021-05-06 08:15:03,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:15:03,390 INFO L480 AbstractCegarLoop]: Abstraction has 1473 states and 1801 transitions. [2021-05-06 08:15:03,390 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 16 states have internal predecessors, (44), 8 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 8 states have call predecessors, (28), 8 states have call successors, (28) [2021-05-06 08:15:03,391 INFO L276 IsEmpty]: Start isEmpty. Operand 1473 states and 1801 transitions. [2021-05-06 08:15:03,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-05-06 08:15:03,407 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:15:03,407 INFO L523 BasicCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:15:03,616 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:15:03,617 INFO L428 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:15:03,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:15:03,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1567893592, now seen corresponding path program 14 times [2021-05-06 08:15:03,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:15:03,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495524829] [2021-05-06 08:15:03,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:15:03,625 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:15:03,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [948715888] [2021-05-06 08:15:03,625 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:15:03,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:15:03,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:15:03,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 128 conjunts are in the unsatisfiable core [2021-05-06 08:15:03,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:15:04,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:04,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:04,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:04,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:04,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:04,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:04,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:04,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:04,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:04,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:04,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:04,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:04,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:04,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:04,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:04,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:04,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:04,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:04,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:04,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:04,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:04,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:05,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:05,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:05,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:05,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1203 backedges. 277 proven. 268 refuted. 0 times theorem prover too weak. 658 trivial. 0 not checked. [2021-05-06 08:15:05,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:15:05,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495524829] [2021-05-06 08:15:05,068 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:15:05,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948715888] [2021-05-06 08:15:05,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948715888] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:15:05,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:15:05,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-05-06 08:15:05,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811140667] [2021-05-06 08:15:05,069 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-06 08:15:05,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:15:05,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-06 08:15:05,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-05-06 08:15:05,069 INFO L87 Difference]: Start difference. First operand 1473 states and 1801 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 16 states have internal predecessors, (48), 10 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 10 states have call predecessors, (28), 10 states have call successors, (28) [2021-05-06 08:15:05,896 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2021-05-06 08:15:06,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:15:06,744 INFO L93 Difference]: Finished difference Result 1521 states and 1852 transitions. [2021-05-06 08:15:06,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-06 08:15:06,758 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 16 states have internal predecessors, (48), 10 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 10 states have call predecessors, (28), 10 states have call successors, (28) Word has length 178 [2021-05-06 08:15:06,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:15:06,767 INFO L225 Difference]: With dead ends: 1521 [2021-05-06 08:15:06,767 INFO L226 Difference]: Without dead ends: 1521 [2021-05-06 08:15:06,768 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 153 SyntacticMatches, 7 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1202.8ms TimeCoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-05-06 08:15:06,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1521 states. [2021-05-06 08:15:06,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1521 to 1450. [2021-05-06 08:15:06,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1450 states, 945 states have (on average 1.1534391534391535) internal successors, (1090), 965 states have internal predecessors, (1090), 339 states have call successors, (339), 166 states have call predecessors, (339), 165 states have return successors, (335), 318 states have call predecessors, (335), 335 states have call successors, (335) [2021-05-06 08:15:06,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1450 states to 1450 states and 1764 transitions. [2021-05-06 08:15:06,821 INFO L78 Accepts]: Start accepts. Automaton has 1450 states and 1764 transitions. Word has length 178 [2021-05-06 08:15:06,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:15:06,821 INFO L480 AbstractCegarLoop]: Abstraction has 1450 states and 1764 transitions. [2021-05-06 08:15:06,821 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 16 states have internal predecessors, (48), 10 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 10 states have call predecessors, (28), 10 states have call successors, (28) [2021-05-06 08:15:06,821 INFO L276 IsEmpty]: Start isEmpty. Operand 1450 states and 1764 transitions. [2021-05-06 08:15:06,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-05-06 08:15:06,823 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:15:06,824 INFO L523 BasicCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:15:07,024 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-05-06 08:15:07,025 INFO L428 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:15:07,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:15:07,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1887563811, now seen corresponding path program 9 times [2021-05-06 08:15:07,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:15:07,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46778904] [2021-05-06 08:15:07,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:15:07,039 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:15:07,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1955755776] [2021-05-06 08:15:07,039 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:15:07,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 08:15:07,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:15:07,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 63 conjunts are in the unsatisfiable core [2021-05-06 08:15:07,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:15:08,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:08,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:08,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:08,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:08,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:08,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:08,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:08,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:08,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:08,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:08,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:08,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:08,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:08,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:08,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:08,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:08,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:08,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:08,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:08,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:08,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:08,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:08,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:08,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:08,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:08,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:08,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:08,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:08,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:08,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:08,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:08,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:08,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:08,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:08,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:08,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:08,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:08,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:08,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:08,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:08,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:08,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:08,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:08,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:08,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:08,409 INFO L134 CoverageAnalysis]: Checked inductivity of 1291 backedges. 119 proven. 71 refuted. 0 times theorem prover too weak. 1101 trivial. 0 not checked. [2021-05-06 08:15:08,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:15:08,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46778904] [2021-05-06 08:15:08,410 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:15:08,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955755776] [2021-05-06 08:15:08,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955755776] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:15:08,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:15:08,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-06 08:15:08,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970463160] [2021-05-06 08:15:08,411 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 08:15:08,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:15:08,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 08:15:08,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:15:08,411 INFO L87 Difference]: Start difference. First operand 1450 states and 1764 transitions. Second operand has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) [2021-05-06 08:15:09,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:15:09,082 INFO L93 Difference]: Finished difference Result 1523 states and 1854 transitions. [2021-05-06 08:15:09,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 08:15:09,083 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) Word has length 180 [2021-05-06 08:15:09,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:15:09,087 INFO L225 Difference]: With dead ends: 1523 [2021-05-06 08:15:09,087 INFO L226 Difference]: Without dead ends: 1517 [2021-05-06 08:15:09,087 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 452.5ms TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-05-06 08:15:09,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1517 states. [2021-05-06 08:15:09,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1517 to 1443. [2021-05-06 08:15:09,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1443 states, 941 states have (on average 1.1519659936238045) internal successors, (1084), 958 states have internal predecessors, (1084), 334 states have call successors, (334), 168 states have call predecessors, (334), 167 states have return successors, (330), 316 states have call predecessors, (330), 330 states have call successors, (330) [2021-05-06 08:15:09,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1443 states to 1443 states and 1748 transitions. [2021-05-06 08:15:09,108 INFO L78 Accepts]: Start accepts. Automaton has 1443 states and 1748 transitions. Word has length 180 [2021-05-06 08:15:09,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:15:09,109 INFO L480 AbstractCegarLoop]: Abstraction has 1443 states and 1748 transitions. [2021-05-06 08:15:09,109 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) [2021-05-06 08:15:09,109 INFO L276 IsEmpty]: Start isEmpty. Operand 1443 states and 1748 transitions. [2021-05-06 08:15:09,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-05-06 08:15:09,111 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:15:09,111 INFO L523 BasicCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:15:09,319 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-05-06 08:15:09,319 INFO L428 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:15:09,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:15:09,320 INFO L82 PathProgramCache]: Analyzing trace with hash -710122111, now seen corresponding path program 10 times [2021-05-06 08:15:09,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:15:09,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565506991] [2021-05-06 08:15:09,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:15:09,326 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:15:09,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [447479263] [2021-05-06 08:15:09,326 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:15:09,436 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 08:15:09,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:15:09,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 75 conjunts are in the unsatisfiable core [2021-05-06 08:15:09,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:15:09,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:09,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:10,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:10,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:10,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:10,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:10,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:10,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:10,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:10,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:10,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:10,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:10,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:10,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:10,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:10,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1291 backedges. 158 proven. 245 refuted. 0 times theorem prover too weak. 888 trivial. 0 not checked. [2021-05-06 08:15:10,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:15:10,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565506991] [2021-05-06 08:15:10,265 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:15:10,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447479263] [2021-05-06 08:15:10,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447479263] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:15:10,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:15:10,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-05-06 08:15:10,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251294238] [2021-05-06 08:15:10,266 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-06 08:15:10,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:15:10,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-06 08:15:10,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-05-06 08:15:10,266 INFO L87 Difference]: Start difference. First operand 1443 states and 1748 transitions. Second operand has 20 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 13 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (29), 11 states have call predecessors, (29), 12 states have call successors, (29) [2021-05-06 08:15:11,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:15:11,814 INFO L93 Difference]: Finished difference Result 1522 states and 1850 transitions. [2021-05-06 08:15:11,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-06 08:15:11,815 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 13 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (29), 11 states have call predecessors, (29), 12 states have call successors, (29) Word has length 180 [2021-05-06 08:15:11,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:15:11,817 INFO L225 Difference]: With dead ends: 1522 [2021-05-06 08:15:11,817 INFO L226 Difference]: Without dead ends: 1517 [2021-05-06 08:15:11,818 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 662.4ms TimeCoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2021-05-06 08:15:11,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1517 states. [2021-05-06 08:15:11,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1517 to 1479. [2021-05-06 08:15:11,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1479 states, 962 states have (on average 1.1538461538461537) internal successors, (1110), 980 states have internal predecessors, (1110), 347 states have call successors, (347), 170 states have call predecessors, (347), 169 states have return successors, (343), 328 states have call predecessors, (343), 343 states have call successors, (343) [2021-05-06 08:15:11,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1479 states to 1479 states and 1800 transitions. [2021-05-06 08:15:11,834 INFO L78 Accepts]: Start accepts. Automaton has 1479 states and 1800 transitions. Word has length 180 [2021-05-06 08:15:11,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:15:11,834 INFO L480 AbstractCegarLoop]: Abstraction has 1479 states and 1800 transitions. [2021-05-06 08:15:11,835 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 13 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (29), 11 states have call predecessors, (29), 12 states have call successors, (29) [2021-05-06 08:15:11,835 INFO L276 IsEmpty]: Start isEmpty. Operand 1479 states and 1800 transitions. [2021-05-06 08:15:11,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-05-06 08:15:11,837 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:15:11,837 INFO L523 BasicCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:15:12,052 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:15:12,053 INFO L428 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:15:12,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:15:12,053 INFO L82 PathProgramCache]: Analyzing trace with hash 2092734557, now seen corresponding path program 11 times [2021-05-06 08:15:12,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:15:12,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82700228] [2021-05-06 08:15:12,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:15:12,058 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:15:12,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [659540781] [2021-05-06 08:15:12,059 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:15:12,194 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-06 08:15:12,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:15:12,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 85 conjunts are in the unsatisfiable core [2021-05-06 08:15:12,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:15:12,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:12,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:12,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:12,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:12,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:12,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:12,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:12,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:12,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:12,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:12,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:12,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:12,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:12,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:12,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:12,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:12,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:12,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:12,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:12,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:12,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:12,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:12,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:12,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:12,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:12,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:12,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:12,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:12,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:15:12,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1291 backedges. 180 proven. 307 refuted. 0 times theorem prover too weak. 804 trivial. 0 not checked. [2021-05-06 08:15:12,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:15:12,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82700228] [2021-05-06 08:15:12,780 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:15:12,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659540781] [2021-05-06 08:15:12,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659540781] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:15:12,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:15:12,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-06 08:15:12,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792057389] [2021-05-06 08:15:12,780 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-06 08:15:12,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:15:12,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-06 08:15:12,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-05-06 08:15:12,781 INFO L87 Difference]: Start difference. First operand 1479 states and 1800 transitions. Second operand has 18 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 15 states have internal predecessors, (45), 12 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (29), 10 states have call predecessors, (29), 12 states have call successors, (29) [2021-05-06 08:15:14,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:15:14,901 INFO L93 Difference]: Finished difference Result 1504 states and 1836 transitions. [2021-05-06 08:15:14,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-06 08:15:14,902 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 15 states have internal predecessors, (45), 12 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (29), 10 states have call predecessors, (29), 12 states have call successors, (29) Word has length 180 [2021-05-06 08:15:14,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:15:14,902 INFO L225 Difference]: With dead ends: 1504 [2021-05-06 08:15:14,902 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 08:15:14,902 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 163 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 389.1ms TimeCoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-05-06 08:15:14,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 08:15:14,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 08:15:14,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-06 08:15:14,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 08:15:14,903 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 180 [2021-05-06 08:15:14,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:15:14,903 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 08:15:14,903 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 15 states have internal predecessors, (45), 12 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (29), 10 states have call predecessors, (29), 12 states have call successors, (29) [2021-05-06 08:15:14,903 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 08:15:14,903 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 08:15:15,104 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:15:15,113 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 08:15:15 BasicIcfg [2021-05-06 08:15:15,114 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 08:15:15,114 INFO L168 Benchmark]: Toolchain (without parser) took 124786.32 ms. Allocated memory was 175.1 MB in the beginning and 443.5 MB in the end (delta: 268.4 MB). Free memory was 140.4 MB in the beginning and 299.5 MB in the end (delta: -159.1 MB). Peak memory consumption was 111.1 MB. Max. memory is 8.0 GB. [2021-05-06 08:15:15,114 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 175.1 MB. Free memory is still 157.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 08:15:15,115 INFO L168 Benchmark]: CACSL2BoogieTranslator took 449.53 ms. Allocated memory is still 175.1 MB. Free memory was 140.2 MB in the beginning and 158.4 MB in the end (delta: -18.3 MB). Peak memory consumption was 12.9 MB. Max. memory is 8.0 GB. [2021-05-06 08:15:15,115 INFO L168 Benchmark]: Boogie Preprocessor took 112.06 ms. Allocated memory is still 175.1 MB. Free memory was 158.4 MB in the beginning and 156.7 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-06 08:15:15,115 INFO L168 Benchmark]: RCFGBuilder took 477.55 ms. Allocated memory is still 175.1 MB. Free memory was 156.2 MB in the beginning and 139.1 MB in the end (delta: 17.1 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-05-06 08:15:15,115 INFO L168 Benchmark]: IcfgTransformer took 27.63 ms. Allocated memory is still 175.1 MB. Free memory was 139.1 MB in the beginning and 138.0 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 08:15:15,115 INFO L168 Benchmark]: TraceAbstraction took 123676.12 ms. Allocated memory was 175.1 MB in the beginning and 443.5 MB in the end (delta: 268.4 MB). Free memory was 137.5 MB in the beginning and 299.5 MB in the end (delta: -162.0 MB). Peak memory consumption was 107.7 MB. Max. memory is 8.0 GB. [2021-05-06 08:15:15,115 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 175.1 MB. Free memory is still 157.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 449.53 ms. Allocated memory is still 175.1 MB. Free memory was 140.2 MB in the beginning and 158.4 MB in the end (delta: -18.3 MB). Peak memory consumption was 12.9 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 112.06 ms. Allocated memory is still 175.1 MB. Free memory was 158.4 MB in the beginning and 156.7 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 477.55 ms. Allocated memory is still 175.1 MB. Free memory was 156.2 MB in the beginning and 139.1 MB in the end (delta: 17.1 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * IcfgTransformer took 27.63 ms. Allocated memory is still 175.1 MB. Free memory was 139.1 MB in the beginning and 138.0 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 123676.12 ms. Allocated memory was 175.1 MB in the beginning and 443.5 MB in the end (delta: 268.4 MB). Free memory was 137.5 MB in the beginning and 299.5 MB in the end (delta: -162.0 MB). Peak memory consumption was 107.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 39 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 123593.6ms, OverallIterations: 56, TraceHistogramMax: 25, EmptinessCheckTime: 118.2ms, AutomataDifference: 57560.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 11.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 3229 SDtfs, 2446 SDslu, 19347 SDs, 0 SdLazy, 18404 SolverSat, 2172 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 41264.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6466 GetRequests, 5664 SyntacticMatches, 28 SemanticMatches, 774 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1959 ImplicationChecksByTransitivity, 34711.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1479occurred in iteration=55, InterpolantAutomatonStates: 695, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 987.4ms AutomataMinimizationTime, 56 MinimizatonAttempts, 895 StatesRemovedByMinimization, 44 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 926.1ms SsaConstructionTime, 8626.0ms SatisfiabilityAnalysisTime, 39153.9ms InterpolantComputationTime, 6263 NumberOfCodeBlocks, 5681 NumberOfCodeBlocksAsserted, 147 NumberOfCheckSat, 6207 ConstructedInterpolants, 0 QuantifiedInterpolants, 43212 SizeOfPredicates, 444 NumberOfNonLiveVariables, 17610 ConjunctsInSsa, 2039 ConjunctsInUnsatCore, 56 InterpolantComputations, 4 PerfectInterpolantSequences, 20413/27799 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...