/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/mannadiv_unwindbound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 21:40:04,390 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 21:40:04,392 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 21:40:04,428 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 21:40:04,429 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 21:40:04,432 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 21:40:04,435 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 21:40:04,439 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 21:40:04,442 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 21:40:04,445 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 21:40:04,446 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 21:40:04,448 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 21:40:04,448 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 21:40:04,450 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 21:40:04,451 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 21:40:04,452 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 21:40:04,455 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 21:40:04,456 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 21:40:04,458 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 21:40:04,463 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 21:40:04,464 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 21:40:04,465 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 21:40:04,466 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 21:40:04,468 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 21:40:04,473 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 21:40:04,481 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 21:40:04,482 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 21:40:04,483 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 21:40:04,487 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 21:40:04,502 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 21:40:04,503 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 21:40:04,507 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 21:40:04,507 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 21:40:04,507 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 21:40:04,508 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 21:40:04,508 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 21:40:04,508 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 21:40:04,508 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 21:40:04,508 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 21:40:04,509 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 21:40:04,509 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 21:40:04,510 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 21:40:04,510 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 21:40:04,510 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 21:40:04,510 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 21:40:04,510 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 21:40:04,510 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 21:40:04,511 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 21:40:04,511 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 21:40:04,511 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 21:40:04,512 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 21:40:04,512 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 21:40:04,816 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 21:40:04,844 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 21:40:04,846 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 21:40:04,847 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 21:40:04,848 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 21:40:04,849 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/mannadiv_unwindbound20.c [2021-05-02 21:40:04,924 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/724aab366/6b42ec3eccbd4962b75ccaefd93db105/FLAG563297404 [2021-05-02 21:40:05,273 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 21:40:05,273 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/mannadiv_unwindbound20.c [2021-05-02 21:40:05,278 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/724aab366/6b42ec3eccbd4962b75ccaefd93db105/FLAG563297404 [2021-05-02 21:40:05,709 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/724aab366/6b42ec3eccbd4962b75ccaefd93db105 [2021-05-02 21:40:05,712 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 21:40:05,714 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 21:40:05,718 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 21:40:05,719 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 21:40:05,723 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 21:40:05,724 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 09:40:05" (1/1) ... [2021-05-02 21:40:05,724 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55d134f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:40:05, skipping insertion in model container [2021-05-02 21:40:05,725 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 09:40:05" (1/1) ... [2021-05-02 21:40:05,730 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 21:40:05,744 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 21:40:05,858 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/mannadiv_unwindbound20.c[573,586] [2021-05-02 21:40:05,869 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 21:40:05,875 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 21:40:05,886 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/mannadiv_unwindbound20.c[573,586] [2021-05-02 21:40:05,890 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 21:40:05,902 INFO L208 MainTranslator]: Completed translation [2021-05-02 21:40:05,902 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:40:05 WrapperNode [2021-05-02 21:40:05,903 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 21:40:05,904 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 21:40:05,904 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 21:40:05,904 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 21:40:05,957 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:40:05" (1/1) ... [2021-05-02 21:40:05,957 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:40:05" (1/1) ... [2021-05-02 21:40:05,962 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:40:05" (1/1) ... [2021-05-02 21:40:05,963 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:40:05" (1/1) ... [2021-05-02 21:40:05,976 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:40:05" (1/1) ... [2021-05-02 21:40:05,979 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:40:05" (1/1) ... [2021-05-02 21:40:05,981 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:40:05" (1/1) ... [2021-05-02 21:40:05,982 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 21:40:05,983 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 21:40:05,983 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 21:40:05,983 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 21:40:05,984 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:40:05" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 21:40:06,055 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 21:40:06,055 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 21:40:06,055 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 21:40:06,055 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 21:40:06,055 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 21:40:06,055 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 21:40:06,055 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 21:40:06,056 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 21:40:06,056 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 21:40:06,056 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 21:40:06,056 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 21:40:06,056 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 21:40:06,056 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 21:40:06,056 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 21:40:06,057 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 21:40:06,057 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 21:40:06,057 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 21:40:06,057 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 21:40:06,057 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 21:40:06,057 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 21:40:06,322 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 21:40:06,322 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 21:40:06,323 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 09:40:06 BoogieIcfgContainer [2021-05-02 21:40:06,323 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 21:40:06,324 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 21:40:06,324 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 21:40:06,325 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 21:40:06,327 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 09:40:06" (1/1) ... [2021-05-02 21:40:06,359 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 09:40:06 BasicIcfg [2021-05-02 21:40:06,359 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 21:40:06,377 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 21:40:06,377 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 21:40:06,380 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 21:40:06,380 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 09:40:05" (1/4) ... [2021-05-02 21:40:06,381 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35013ce1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 09:40:06, skipping insertion in model container [2021-05-02 21:40:06,381 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 09:40:05" (2/4) ... [2021-05-02 21:40:06,381 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35013ce1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 09:40:06, skipping insertion in model container [2021-05-02 21:40:06,381 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 09:40:06" (3/4) ... [2021-05-02 21:40:06,382 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35013ce1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 09:40:06, skipping insertion in model container [2021-05-02 21:40:06,382 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 09:40:06" (4/4) ... [2021-05-02 21:40:06,383 INFO L111 eAbstractionObserver]: Analyzing ICFG mannadiv_unwindbound20.cJordan [2021-05-02 21:40:06,387 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 21:40:06,390 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 21:40:06,421 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 21:40:06,453 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 21:40:06,454 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 21:40:06,454 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 21:40:06,454 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 21:40:06,454 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 21:40:06,454 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 21:40:06,454 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 21:40:06,454 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 21:40:06,487 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 21:40:06,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 21:40:06,494 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:40:06,494 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 21:40:06,494 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:40:06,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:40:06,499 INFO L82 PathProgramCache]: Analyzing trace with hash 734203501, now seen corresponding path program 1 times [2021-05-02 21:40:06,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:40:06,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111156305] [2021-05-02 21:40:06,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:40:06,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:40:06,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 21:40:06,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:40:06,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 21:40:06,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:40:06,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-02 21:40:06,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:40:06,762 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 21:40:06,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:40:06,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111156305] [2021-05-02 21:40:06,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111156305] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 21:40:06,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 21:40:06,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 21:40:06,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450618333] [2021-05-02 21:40:06,767 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 21:40:06,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:40:06,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 21:40:06,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 21:40:06,779 INFO L87 Difference]: Start difference. First operand has 30 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 21:40:06,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:40:06,868 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2021-05-02 21:40:06,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 21:40:06,870 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-02 21:40:06,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:40:06,876 INFO L225 Difference]: With dead ends: 31 [2021-05-02 21:40:06,877 INFO L226 Difference]: Without dead ends: 26 [2021-05-02 21:40:06,878 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 50.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 21:40:06,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-02 21:40:06,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-05-02 21:40:06,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 21:40:06,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2021-05-02 21:40:06,910 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 22 [2021-05-02 21:40:06,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:40:06,911 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2021-05-02 21:40:06,911 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 21:40:06,911 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2021-05-02 21:40:06,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 21:40:06,913 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:40:06,913 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 21:40:06,913 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 21:40:06,913 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:40:06,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:40:06,914 INFO L82 PathProgramCache]: Analyzing trace with hash -1669026344, now seen corresponding path program 1 times [2021-05-02 21:40:06,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:40:06,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508320631] [2021-05-02 21:40:06,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:40:06,949 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:40:06,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [321839904] [2021-05-02 21:40:06,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:40:07,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:40:07,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 21:40:07,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:40:07,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:07,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:07,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:07,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:07,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:07,194 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 21:40:07,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:40:07,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508320631] [2021-05-02 21:40:07,195 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:40:07,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321839904] [2021-05-02 21:40:07,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321839904] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 21:40:07,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 21:40:07,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 21:40:07,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438319218] [2021-05-02 21:40:07,197 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 21:40:07,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:40:07,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 21:40:07,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 21:40:07,198 INFO L87 Difference]: Start difference. First operand 25 states and 29 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, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 21:40:07,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:40:07,215 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2021-05-02 21:40:07,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 21:40:07,216 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, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-02 21:40:07,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:40:07,218 INFO L225 Difference]: With dead ends: 27 [2021-05-02 21:40:07,219 INFO L226 Difference]: Without dead ends: 27 [2021-05-02 21:40:07,222 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.8ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 21:40:07,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-02 21:40:07,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-02 21:40:07,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 21:40:07,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-05-02 21:40:07,231 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 23 [2021-05-02 21:40:07,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:40:07,232 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-05-02 21:40:07,237 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, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 21:40:07,238 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-05-02 21:40:07,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 21:40:07,238 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:40:07,238 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 21:40:07,460 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 21:40:07,461 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:40:07,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:40:07,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1667953868, now seen corresponding path program 1 times [2021-05-02 21:40:07,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:40:07,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910365757] [2021-05-02 21:40:07,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:40:07,491 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:40:07,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [264534896] [2021-05-02 21:40:07,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:40:07,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:40:07,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 21:40:07,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:40:07,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:07,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:07,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:07,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:07,645 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 21:40:07,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:40:07,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910365757] [2021-05-02 21:40:07,646 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:40:07,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264534896] [2021-05-02 21:40:07,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264534896] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 21:40:07,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 21:40:07,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 21:40:07,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688675032] [2021-05-02 21:40:07,647 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 21:40:07,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:40:07,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 21:40:07,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 21:40:07,648 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 21:40:07,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:40:07,744 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2021-05-02 21:40:07,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 21:40:07,745 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-02 21:40:07,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:40:07,746 INFO L225 Difference]: With dead ends: 35 [2021-05-02 21:40:07,746 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 21:40:07,747 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 41.8ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 21:40:07,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 21:40:07,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2021-05-02 21:40:07,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.2) internal successors, (24), 22 states have internal predecessors, (24), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 21:40:07,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2021-05-02 21:40:07,752 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 23 [2021-05-02 21:40:07,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:40:07,752 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2021-05-02 21:40:07,752 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 21:40:07,752 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2021-05-02 21:40:07,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 21:40:07,753 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:40:07,753 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 21:40:07,975 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:40:07,975 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:40:07,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:40:07,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1179905874, now seen corresponding path program 1 times [2021-05-02 21:40:07,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:40:07,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020177829] [2021-05-02 21:40:07,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:40:07,988 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:40:07,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [659414647] [2021-05-02 21:40:07,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:40:08,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:40:08,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 21:40:08,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:40:08,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:08,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:08,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:08,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:08,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:08,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:08,255 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 21:40:08,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:40:08,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020177829] [2021-05-02 21:40:08,256 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:40:08,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659414647] [2021-05-02 21:40:08,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659414647] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 21:40:08,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 21:40:08,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 21:40:08,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537129338] [2021-05-02 21:40:08,257 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 21:40:08,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:40:08,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 21:40:08,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-02 21:40:08,258 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 21:40:08,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:40:08,394 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2021-05-02 21:40:08,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 21:40:08,395 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 29 [2021-05-02 21:40:08,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:40:08,397 INFO L225 Difference]: With dead ends: 37 [2021-05-02 21:40:08,397 INFO L226 Difference]: Without dead ends: 34 [2021-05-02 21:40:08,400 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 115.8ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-05-02 21:40:08,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-02 21:40:08,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 29. [2021-05-02 21:40:08,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 21:40:08,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2021-05-02 21:40:08,410 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 29 [2021-05-02 21:40:08,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:40:08,411 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2021-05-02 21:40:08,411 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 21:40:08,411 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2021-05-02 21:40:08,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 21:40:08,412 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:40:08,412 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 21:40:08,628 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:40:08,629 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:40:08,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:40:08,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1668946595, now seen corresponding path program 1 times [2021-05-02 21:40:08,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:40:08,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723123461] [2021-05-02 21:40:08,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:40:08,641 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:40:08,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [965112353] [2021-05-02 21:40:08,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:40:08,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:40:08,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 21:40:08,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:40:08,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:08,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:08,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:08,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:08,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:08,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:08,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:08,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:08,803 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 21:40:08,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:40:08,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723123461] [2021-05-02 21:40:08,804 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:40:08,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965112353] [2021-05-02 21:40:08,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965112353] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 21:40:08,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 21:40:08,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 21:40:08,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5279636] [2021-05-02 21:40:08,805 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 21:40:08,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:40:08,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 21:40:08,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 21:40:08,806 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 21:40:08,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:40:08,838 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2021-05-02 21:40:08,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 21:40:08,838 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2021-05-02 21:40:08,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:40:08,839 INFO L225 Difference]: With dead ends: 38 [2021-05-02 21:40:08,839 INFO L226 Difference]: Without dead ends: 38 [2021-05-02 21:40:08,839 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 14.0ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 21:40:08,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-02 21:40:08,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-05-02 21:40:08,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 21:40:08,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2021-05-02 21:40:08,843 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 32 [2021-05-02 21:40:08,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:40:08,843 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2021-05-02 21:40:08,843 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 21:40:08,844 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2021-05-02 21:40:08,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 21:40:08,844 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:40:08,844 INFO L523 BasicCegarLoop]: trace histogram [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] [2021-05-02 21:40:09,057 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:40:09,058 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:40:09,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:40:09,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1377493560, now seen corresponding path program 2 times [2021-05-02 21:40:09,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:40:09,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076908076] [2021-05-02 21:40:09,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:40:09,070 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:40:09,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1168615258] [2021-05-02 21:40:09,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:40:09,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 21:40:09,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 21:40:09,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 21:40:09,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:40:09,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:09,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:09,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:09,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:09,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:09,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:09,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:09,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:09,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:09,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:09,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:09,250 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 21:40:09,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:40:09,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076908076] [2021-05-02 21:40:09,250 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:40:09,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168615258] [2021-05-02 21:40:09,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168615258] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 21:40:09,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 21:40:09,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 21:40:09,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909399108] [2021-05-02 21:40:09,251 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 21:40:09,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:40:09,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 21:40:09,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 21:40:09,252 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 21:40:09,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:40:09,294 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2021-05-02 21:40:09,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 21:40:09,295 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 41 [2021-05-02 21:40:09,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:40:09,296 INFO L225 Difference]: With dead ends: 47 [2021-05-02 21:40:09,296 INFO L226 Difference]: Without dead ends: 47 [2021-05-02 21:40:09,296 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 23.6ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-02 21:40:09,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-02 21:40:09,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-05-02 21:40:09,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 33 states have (on average 1.121212121212121) internal successors, (37), 33 states have internal predecessors, (37), 8 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 21:40:09,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2021-05-02 21:40:09,300 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 41 [2021-05-02 21:40:09,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:40:09,300 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2021-05-02 21:40:09,300 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 21:40:09,301 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2021-05-02 21:40:09,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-02 21:40:09,301 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:40:09,301 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-05-02 21:40:09,524 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 21:40:09,525 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:40:09,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:40:09,525 INFO L82 PathProgramCache]: Analyzing trace with hash 489214531, now seen corresponding path program 3 times [2021-05-02 21:40:09,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:40:09,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904515522] [2021-05-02 21:40:09,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:40:09,536 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:40:09,536 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [208857968] [2021-05-02 21:40:09,536 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:40:09,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 21:40:09,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 21:40:09,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 21:40:09,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:40:09,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:09,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:09,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:09,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:09,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:09,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:09,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:09,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:09,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:09,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:09,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:09,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:09,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:09,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:09,788 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 21:40:09,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:40:09,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904515522] [2021-05-02 21:40:09,788 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:40:09,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208857968] [2021-05-02 21:40:09,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208857968] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 21:40:09,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 21:40:09,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 21:40:09,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439932336] [2021-05-02 21:40:09,789 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 21:40:09,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:40:09,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 21:40:09,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 21:40:09,790 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2021-05-02 21:40:09,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:40:09,851 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2021-05-02 21:40:09,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 21:40:09,852 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 50 [2021-05-02 21:40:09,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:40:09,852 INFO L225 Difference]: With dead ends: 56 [2021-05-02 21:40:09,853 INFO L226 Difference]: Without dead ends: 56 [2021-05-02 21:40:09,853 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 35.6ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-02 21:40:09,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-02 21:40:09,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-05-02 21:40:09,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 40 states have (on average 1.125) internal successors, (45), 40 states have internal predecessors, (45), 9 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 21:40:09,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2021-05-02 21:40:09,858 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 50 [2021-05-02 21:40:09,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:40:09,858 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2021-05-02 21:40:09,859 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2021-05-02 21:40:09,859 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2021-05-02 21:40:09,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-05-02 21:40:09,860 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:40:09,860 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 21:40:10,064 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:40:10,065 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:40:10,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:40:10,065 INFO L82 PathProgramCache]: Analyzing trace with hash -906969448, now seen corresponding path program 4 times [2021-05-02 21:40:10,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:40:10,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143183231] [2021-05-02 21:40:10,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:40:10,076 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:40:10,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [820588256] [2021-05-02 21:40:10,076 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:40:10,151 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 21:40:10,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 21:40:10,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-02 21:40:10,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:40:10,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:10,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:10,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:10,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:10,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:10,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:10,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:10,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:10,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:10,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:10,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:10,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:10,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:10,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:10,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:10,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:10,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:10,310 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 8 proven. 62 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 21:40:10,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:40:10,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143183231] [2021-05-02 21:40:10,311 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:40:10,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820588256] [2021-05-02 21:40:10,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820588256] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 21:40:10,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 21:40:10,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 21:40:10,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067958734] [2021-05-02 21:40:10,311 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 21:40:10,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:40:10,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 21:40:10,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 21:40:10,312 INFO L87 Difference]: Start difference. First operand 56 states and 61 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2021-05-02 21:40:10,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:40:10,385 INFO L93 Difference]: Finished difference Result 65 states and 71 transitions. [2021-05-02 21:40:10,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 21:40:10,386 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) Word has length 59 [2021-05-02 21:40:10,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:40:10,386 INFO L225 Difference]: With dead ends: 65 [2021-05-02 21:40:10,386 INFO L226 Difference]: Without dead ends: 65 [2021-05-02 21:40:10,387 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 47.1ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-05-02 21:40:10,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-05-02 21:40:10,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-05-02 21:40:10,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 47 states have (on average 1.127659574468085) internal successors, (53), 47 states have internal predecessors, (53), 10 states have call successors, (10), 9 states have call predecessors, (10), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 21:40:10,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 71 transitions. [2021-05-02 21:40:10,391 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 71 transitions. Word has length 59 [2021-05-02 21:40:10,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:40:10,391 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 71 transitions. [2021-05-02 21:40:10,392 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2021-05-02 21:40:10,392 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 71 transitions. [2021-05-02 21:40:10,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-02 21:40:10,393 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:40:10,393 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 21:40:10,608 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:40:10,609 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:40:10,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:40:10,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1572135395, now seen corresponding path program 5 times [2021-05-02 21:40:10,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:40:10,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513210775] [2021-05-02 21:40:10,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:40:10,619 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:40:10,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [229909252] [2021-05-02 21:40:10,620 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:40:10,680 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-02 21:40:10,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 21:40:10,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 21:40:10,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:40:10,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:10,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:10,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:10,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:10,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:10,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:10,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:10,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:10,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:10,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:10,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:10,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:10,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:10,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:10,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:10,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:10,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:10,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:10,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:10,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:10,870 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 10 proven. 100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 21:40:10,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:40:10,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513210775] [2021-05-02 21:40:10,870 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:40:10,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229909252] [2021-05-02 21:40:10,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229909252] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 21:40:10,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 21:40:10,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 21:40:10,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966244879] [2021-05-02 21:40:10,871 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 21:40:10,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:40:10,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 21:40:10,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-02 21:40:10,872 INFO L87 Difference]: Start difference. First operand 65 states and 71 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2021-05-02 21:40:10,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:40:10,970 INFO L93 Difference]: Finished difference Result 74 states and 81 transitions. [2021-05-02 21:40:10,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 21:40:10,970 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) Word has length 68 [2021-05-02 21:40:10,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:40:10,971 INFO L225 Difference]: With dead ends: 74 [2021-05-02 21:40:10,971 INFO L226 Difference]: Without dead ends: 74 [2021-05-02 21:40:10,972 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 68.8ms TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-05-02 21:40:10,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-05-02 21:40:10,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-05-02 21:40:10,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 54 states have (on average 1.1296296296296295) internal successors, (61), 54 states have internal predecessors, (61), 11 states have call successors, (11), 10 states have call predecessors, (11), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 21:40:10,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 81 transitions. [2021-05-02 21:40:10,976 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 81 transitions. Word has length 68 [2021-05-02 21:40:10,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:40:10,977 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 81 transitions. [2021-05-02 21:40:10,977 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2021-05-02 21:40:10,977 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 81 transitions. [2021-05-02 21:40:10,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-05-02 21:40:10,978 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:40:10,978 INFO L523 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 21:40:11,195 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-02 21:40:11,195 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:40:11,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:40:11,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1651262200, now seen corresponding path program 6 times [2021-05-02 21:40:11,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:40:11,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145552437] [2021-05-02 21:40:11,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:40:11,210 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:40:11,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1416465203] [2021-05-02 21:40:11,210 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:40:11,282 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-02 21:40:11,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 21:40:11,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 21:40:11,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:40:11,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:11,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:11,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:11,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:11,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:11,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:11,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:11,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:11,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:11,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:11,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:11,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:11,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:11,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:11,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:11,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:11,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:11,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:11,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:11,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:11,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:11,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:11,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:11,488 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 12 proven. 147 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 21:40:11,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:40:11,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145552437] [2021-05-02 21:40:11,488 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:40:11,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416465203] [2021-05-02 21:40:11,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416465203] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 21:40:11,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 21:40:11,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 21:40:11,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425696807] [2021-05-02 21:40:11,489 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 21:40:11,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:40:11,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 21:40:11,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-02 21:40:11,490 INFO L87 Difference]: Start difference. First operand 74 states and 81 transitions. Second operand has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 9 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2021-05-02 21:40:11,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:40:11,643 INFO L93 Difference]: Finished difference Result 83 states and 91 transitions. [2021-05-02 21:40:11,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 21:40:11,644 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 9 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) Word has length 77 [2021-05-02 21:40:11,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:40:11,646 INFO L225 Difference]: With dead ends: 83 [2021-05-02 21:40:11,646 INFO L226 Difference]: Without dead ends: 83 [2021-05-02 21:40:11,646 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 110.5ms TimeCoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2021-05-02 21:40:11,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-05-02 21:40:11,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-05-02 21:40:11,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 61 states have (on average 1.1311475409836065) internal successors, (69), 61 states have internal predecessors, (69), 12 states have call successors, (12), 11 states have call predecessors, (12), 9 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 21:40:11,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 91 transitions. [2021-05-02 21:40:11,657 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 91 transitions. Word has length 77 [2021-05-02 21:40:11,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:40:11,658 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 91 transitions. [2021-05-02 21:40:11,658 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 9 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2021-05-02 21:40:11,658 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 91 transitions. [2021-05-02 21:40:11,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-05-02 21:40:11,662 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:40:11,662 INFO L523 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 21:40:11,875 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:40:11,875 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:40:11,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:40:11,875 INFO L82 PathProgramCache]: Analyzing trace with hash -1720170109, now seen corresponding path program 7 times [2021-05-02 21:40:11,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:40:11,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552072905] [2021-05-02 21:40:11,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:40:11,884 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:40:11,884 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1772129196] [2021-05-02 21:40:11,884 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:40:11,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:40:11,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 21:40:11,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:40:11,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:11,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:11,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:12,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:12,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:12,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:12,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:12,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:12,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:12,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:12,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:12,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:12,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:12,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:12,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:12,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:12,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:12,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:12,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:12,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:12,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:12,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:12,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:12,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:12,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:12,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:12,215 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 14 proven. 203 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 21:40:12,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:40:12,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552072905] [2021-05-02 21:40:12,216 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:40:12,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772129196] [2021-05-02 21:40:12,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772129196] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 21:40:12,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 21:40:12,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 21:40:12,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456923136] [2021-05-02 21:40:12,217 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 21:40:12,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:40:12,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 21:40:12,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-02 21:40:12,217 INFO L87 Difference]: Start difference. First operand 83 states and 91 transitions. Second operand has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 10 states have internal predecessors, (61), 10 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2021-05-02 21:40:12,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:40:12,347 INFO L93 Difference]: Finished difference Result 92 states and 101 transitions. [2021-05-02 21:40:12,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 21:40:12,347 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 10 states have internal predecessors, (61), 10 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) Word has length 86 [2021-05-02 21:40:12,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:40:12,348 INFO L225 Difference]: With dead ends: 92 [2021-05-02 21:40:12,348 INFO L226 Difference]: Without dead ends: 92 [2021-05-02 21:40:12,348 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 110.1ms TimeCoverageRelationStatistics Valid=117, Invalid=189, Unknown=0, NotChecked=0, Total=306 [2021-05-02 21:40:12,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-05-02 21:40:12,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2021-05-02 21:40:12,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 68 states have (on average 1.1323529411764706) internal successors, (77), 68 states have internal predecessors, (77), 13 states have call successors, (13), 12 states have call predecessors, (13), 10 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 21:40:12,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 101 transitions. [2021-05-02 21:40:12,353 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 101 transitions. Word has length 86 [2021-05-02 21:40:12,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:40:12,353 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 101 transitions. [2021-05-02 21:40:12,353 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 10 states have internal predecessors, (61), 10 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2021-05-02 21:40:12,354 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 101 transitions. [2021-05-02 21:40:12,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-05-02 21:40:12,354 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:40:12,355 INFO L523 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 21:40:12,576 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:40:12,577 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:40:12,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:40:12,577 INFO L82 PathProgramCache]: Analyzing trace with hash -327979176, now seen corresponding path program 8 times [2021-05-02 21:40:12,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:40:12,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103595854] [2021-05-02 21:40:12,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:40:12,585 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:40:12,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1597411412] [2021-05-02 21:40:12,585 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:40:12,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 21:40:12,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 21:40:12,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 21:40:12,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:40:12,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:12,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:12,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:12,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:12,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:12,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:12,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:12,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:12,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:12,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:12,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:12,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:12,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:12,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:12,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:12,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:12,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:12,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:12,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:12,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:12,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:12,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:12,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:12,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:12,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:12,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:12,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:12,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:12,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:12,909 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 16 proven. 268 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 21:40:12,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:40:12,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103595854] [2021-05-02 21:40:12,910 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:40:12,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597411412] [2021-05-02 21:40:12,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597411412] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 21:40:12,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 21:40:12,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 21:40:12,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816813479] [2021-05-02 21:40:12,911 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 21:40:12,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:40:12,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 21:40:12,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-02 21:40:12,911 INFO L87 Difference]: Start difference. First operand 92 states and 101 transitions. Second operand has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 11 states have internal predecessors, (68), 11 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) [2021-05-02 21:40:13,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:40:13,062 INFO L93 Difference]: Finished difference Result 101 states and 111 transitions. [2021-05-02 21:40:13,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-02 21:40:13,062 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 11 states have internal predecessors, (68), 11 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) Word has length 95 [2021-05-02 21:40:13,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:40:13,067 INFO L225 Difference]: With dead ends: 101 [2021-05-02 21:40:13,067 INFO L226 Difference]: Without dead ends: 101 [2021-05-02 21:40:13,067 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 138.7ms TimeCoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2021-05-02 21:40:13,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-05-02 21:40:13,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2021-05-02 21:40:13,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 75 states have (on average 1.1333333333333333) internal successors, (85), 75 states have internal predecessors, (85), 14 states have call successors, (14), 13 states have call predecessors, (14), 11 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 21:40:13,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 111 transitions. [2021-05-02 21:40:13,079 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 111 transitions. Word has length 95 [2021-05-02 21:40:13,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:40:13,080 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 111 transitions. [2021-05-02 21:40:13,080 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 11 states have internal predecessors, (68), 11 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) [2021-05-02 21:40:13,080 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 111 transitions. [2021-05-02 21:40:13,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-02 21:40:13,081 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:40:13,082 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 21:40:13,296 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-02 21:40:13,297 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:40:13,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:40:13,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1572009693, now seen corresponding path program 9 times [2021-05-02 21:40:13,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:40:13,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175042103] [2021-05-02 21:40:13,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:40:13,305 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:40:13,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [641833295] [2021-05-02 21:40:13,305 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:40:13,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-05-02 21:40:13,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 21:40:13,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 21:40:13,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:40:13,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:13,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:13,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:13,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:13,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:13,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:13,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:13,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:13,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:13,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:13,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:13,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:13,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:13,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:13,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:13,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:13,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:13,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:13,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:13,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:13,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:13,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:13,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:13,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:13,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:13,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:13,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:13,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:13,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:13,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:13,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:13,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:13,670 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 18 proven. 342 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 21:40:13,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:40:13,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175042103] [2021-05-02 21:40:13,670 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:40:13,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641833295] [2021-05-02 21:40:13,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641833295] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 21:40:13,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 21:40:13,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 21:40:13,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215820379] [2021-05-02 21:40:13,671 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 21:40:13,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:40:13,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 21:40:13,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-02 21:40:13,672 INFO L87 Difference]: Start difference. First operand 101 states and 111 transitions. Second operand has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 12 states have internal predecessors, (75), 12 states have call successors, (14), 12 states have call predecessors, (14), 10 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2021-05-02 21:40:13,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:40:13,860 INFO L93 Difference]: Finished difference Result 110 states and 121 transitions. [2021-05-02 21:40:13,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-02 21:40:13,861 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 12 states have internal predecessors, (75), 12 states have call successors, (14), 12 states have call predecessors, (14), 10 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) Word has length 104 [2021-05-02 21:40:13,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:40:13,862 INFO L225 Difference]: With dead ends: 110 [2021-05-02 21:40:13,862 INFO L226 Difference]: Without dead ends: 110 [2021-05-02 21:40:13,862 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 147.2ms TimeCoverageRelationStatistics Valid=176, Invalid=286, Unknown=0, NotChecked=0, Total=462 [2021-05-02 21:40:13,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-05-02 21:40:13,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2021-05-02 21:40:13,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 82 states have (on average 1.1341463414634145) internal successors, (93), 82 states have internal predecessors, (93), 15 states have call successors, (15), 14 states have call predecessors, (15), 12 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 21:40:13,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 121 transitions. [2021-05-02 21:40:13,866 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 121 transitions. Word has length 104 [2021-05-02 21:40:13,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:40:13,866 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 121 transitions. [2021-05-02 21:40:13,866 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 12 states have internal predecessors, (75), 12 states have call successors, (14), 12 states have call predecessors, (14), 10 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2021-05-02 21:40:13,867 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 121 transitions. [2021-05-02 21:40:13,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-05-02 21:40:13,867 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:40:13,867 INFO L523 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 21:40:14,068 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-02 21:40:14,068 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:40:14,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:40:14,068 INFO L82 PathProgramCache]: Analyzing trace with hash 191644600, now seen corresponding path program 10 times [2021-05-02 21:40:14,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:40:14,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547158979] [2021-05-02 21:40:14,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:40:14,076 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:40:14,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1049912313] [2021-05-02 21:40:14,076 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:40:14,159 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 21:40:14,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 21:40:14,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 21:40:14,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:40:14,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:14,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:14,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:14,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:14,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:14,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:14,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:14,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:14,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:14,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:14,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:14,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:14,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:14,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:14,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:14,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:14,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:14,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:14,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:14,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:14,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:14,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:14,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:14,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:14,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:14,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:14,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:14,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:14,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:14,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:14,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:14,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:14,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:14,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:14,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:14,417 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 20 proven. 425 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 21:40:14,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:40:14,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547158979] [2021-05-02 21:40:14,417 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:40:14,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049912313] [2021-05-02 21:40:14,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049912313] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 21:40:14,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 21:40:14,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 21:40:14,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066528747] [2021-05-02 21:40:14,418 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 21:40:14,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:40:14,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 21:40:14,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-05-02 21:40:14,419 INFO L87 Difference]: Start difference. First operand 110 states and 121 transitions. Second operand has 14 states, 14 states have (on average 5.857142857142857) internal successors, (82), 13 states have internal predecessors, (82), 13 states have call successors, (15), 13 states have call predecessors, (15), 11 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) [2021-05-02 21:40:14,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:40:14,591 INFO L93 Difference]: Finished difference Result 119 states and 131 transitions. [2021-05-02 21:40:14,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-02 21:40:14,592 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.857142857142857) internal successors, (82), 13 states have internal predecessors, (82), 13 states have call successors, (15), 13 states have call predecessors, (15), 11 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) Word has length 113 [2021-05-02 21:40:14,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:40:14,593 INFO L225 Difference]: With dead ends: 119 [2021-05-02 21:40:14,593 INFO L226 Difference]: Without dead ends: 119 [2021-05-02 21:40:14,593 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 164.5ms TimeCoverageRelationStatistics Valid=210, Invalid=342, Unknown=0, NotChecked=0, Total=552 [2021-05-02 21:40:14,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-05-02 21:40:14,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2021-05-02 21:40:14,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 89 states have (on average 1.1348314606741574) internal successors, (101), 89 states have internal predecessors, (101), 16 states have call successors, (16), 15 states have call predecessors, (16), 13 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-02 21:40:14,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 131 transitions. [2021-05-02 21:40:14,597 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 131 transitions. Word has length 113 [2021-05-02 21:40:14,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:40:14,598 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 131 transitions. [2021-05-02 21:40:14,598 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.857142857142857) internal successors, (82), 13 states have internal predecessors, (82), 13 states have call successors, (15), 13 states have call predecessors, (15), 11 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) [2021-05-02 21:40:14,598 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 131 transitions. [2021-05-02 21:40:14,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-05-02 21:40:14,599 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:40:14,599 INFO L523 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 21:40:14,813 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 21:40:14,813 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:40:14,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:40:14,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1200431299, now seen corresponding path program 11 times [2021-05-02 21:40:14,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:40:14,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582865266] [2021-05-02 21:40:14,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:40:14,827 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:40:14,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1284108819] [2021-05-02 21:40:14,828 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:40:14,913 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-05-02 21:40:14,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 21:40:14,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 21:40:14,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:40:14,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:14,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:14,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:14,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:14,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:14,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:14,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:14,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:14,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:14,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:14,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:14,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:15,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:15,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:15,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:15,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:15,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:15,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:15,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:15,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:15,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:15,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:15,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:15,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:15,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:15,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:15,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:15,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:15,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:15,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:15,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:15,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:15,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:15,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:15,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:15,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:15,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:15,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:15,210 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 22 proven. 517 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 21:40:15,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:40:15,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582865266] [2021-05-02 21:40:15,210 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:40:15,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284108819] [2021-05-02 21:40:15,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284108819] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 21:40:15,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 21:40:15,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 21:40:15,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822361039] [2021-05-02 21:40:15,211 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 21:40:15,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:40:15,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 21:40:15,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-05-02 21:40:15,213 INFO L87 Difference]: Start difference. First operand 119 states and 131 transitions. Second operand has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 14 states have internal predecessors, (89), 14 states have call successors, (16), 14 states have call predecessors, (16), 12 states have return successors, (14), 12 states have call predecessors, (14), 13 states have call successors, (14) [2021-05-02 21:40:15,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:40:15,391 INFO L93 Difference]: Finished difference Result 128 states and 141 transitions. [2021-05-02 21:40:15,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-02 21:40:15,392 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 14 states have internal predecessors, (89), 14 states have call successors, (16), 14 states have call predecessors, (16), 12 states have return successors, (14), 12 states have call predecessors, (14), 13 states have call successors, (14) Word has length 122 [2021-05-02 21:40:15,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:40:15,393 INFO L225 Difference]: With dead ends: 128 [2021-05-02 21:40:15,393 INFO L226 Difference]: Without dead ends: 128 [2021-05-02 21:40:15,395 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 180.7ms TimeCoverageRelationStatistics Valid=247, Invalid=403, Unknown=0, NotChecked=0, Total=650 [2021-05-02 21:40:15,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-05-02 21:40:15,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2021-05-02 21:40:15,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 96 states have (on average 1.1354166666666667) internal successors, (109), 96 states have internal predecessors, (109), 17 states have call successors, (17), 16 states have call predecessors, (17), 14 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 21:40:15,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 141 transitions. [2021-05-02 21:40:15,402 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 141 transitions. Word has length 122 [2021-05-02 21:40:15,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:40:15,402 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 141 transitions. [2021-05-02 21:40:15,402 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 14 states have internal predecessors, (89), 14 states have call successors, (16), 14 states have call predecessors, (16), 12 states have return successors, (14), 12 states have call predecessors, (14), 13 states have call successors, (14) [2021-05-02 21:40:15,402 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 141 transitions. [2021-05-02 21:40:15,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-05-02 21:40:15,404 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:40:15,404 INFO L523 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 21:40:15,627 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:40:15,627 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:40:15,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:40:15,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1791180776, now seen corresponding path program 12 times [2021-05-02 21:40:15,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:40:15,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489460162] [2021-05-02 21:40:15,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:40:15,635 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:40:15,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [324215412] [2021-05-02 21:40:15,635 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:40:15,745 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-05-02 21:40:15,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 21:40:15,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-02 21:40:15,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:40:15,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:15,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:15,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:15,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:15,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:15,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:15,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:15,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:15,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:15,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:15,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:15,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:15,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:15,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:15,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:15,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:15,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:15,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:15,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:15,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:15,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:15,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:15,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:15,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:15,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:15,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:15,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:15,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:15,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:15,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:15,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:15,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:15,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:15,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:15,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:15,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:16,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:16,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:16,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:16,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:16,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:16,063 INFO L134 CoverageAnalysis]: Checked inductivity of 646 backedges. 24 proven. 618 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 21:40:16,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:40:16,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489460162] [2021-05-02 21:40:16,063 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:40:16,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324215412] [2021-05-02 21:40:16,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324215412] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 21:40:16,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 21:40:16,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-02 21:40:16,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358817954] [2021-05-02 21:40:16,064 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 21:40:16,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:40:16,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 21:40:16,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-05-02 21:40:16,065 INFO L87 Difference]: Start difference. First operand 128 states and 141 transitions. Second operand has 16 states, 16 states have (on average 6.0) internal successors, (96), 15 states have internal predecessors, (96), 15 states have call successors, (17), 15 states have call predecessors, (17), 13 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) [2021-05-02 21:40:16,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:40:16,268 INFO L93 Difference]: Finished difference Result 137 states and 151 transitions. [2021-05-02 21:40:16,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-02 21:40:16,269 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 6.0) internal successors, (96), 15 states have internal predecessors, (96), 15 states have call successors, (17), 15 states have call predecessors, (17), 13 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) Word has length 131 [2021-05-02 21:40:16,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:40:16,270 INFO L225 Difference]: With dead ends: 137 [2021-05-02 21:40:16,270 INFO L226 Difference]: Without dead ends: 137 [2021-05-02 21:40:16,270 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 199.3ms TimeCoverageRelationStatistics Valid=287, Invalid=469, Unknown=0, NotChecked=0, Total=756 [2021-05-02 21:40:16,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-05-02 21:40:16,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2021-05-02 21:40:16,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 103 states have (on average 1.1359223300970873) internal successors, (117), 103 states have internal predecessors, (117), 18 states have call successors, (18), 17 states have call predecessors, (18), 15 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 21:40:16,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 151 transitions. [2021-05-02 21:40:16,274 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 151 transitions. Word has length 131 [2021-05-02 21:40:16,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:40:16,274 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 151 transitions. [2021-05-02 21:40:16,275 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 6.0) internal successors, (96), 15 states have internal predecessors, (96), 15 states have call successors, (17), 15 states have call predecessors, (17), 13 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) [2021-05-02 21:40:16,275 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 151 transitions. [2021-05-02 21:40:16,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-05-02 21:40:16,276 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:40:16,276 INFO L523 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 13, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 21:40:16,495 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-02 21:40:16,495 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:40:16,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:40:16,496 INFO L82 PathProgramCache]: Analyzing trace with hash -166555549, now seen corresponding path program 13 times [2021-05-02 21:40:16,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:40:16,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208177487] [2021-05-02 21:40:16,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:40:16,503 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:40:16,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [57724423] [2021-05-02 21:40:16,503 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:40:16,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:40:16,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 21:40:16,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:40:16,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:16,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:16,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:16,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:16,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:16,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:16,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:16,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:16,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:16,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:16,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:16,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:16,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:16,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:16,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:16,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:16,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:16,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:16,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:16,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:16,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:16,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:16,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:16,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:16,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:16,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:16,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:16,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:16,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:16,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:16,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:16,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:16,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:16,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:16,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:16,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:16,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:16,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:16,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:16,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:16,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:16,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:16,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:16,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:16,925 INFO L134 CoverageAnalysis]: Checked inductivity of 758 backedges. 26 proven. 728 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 21:40:16,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:40:16,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208177487] [2021-05-02 21:40:16,926 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:40:16,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57724423] [2021-05-02 21:40:16,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57724423] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 21:40:16,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 21:40:16,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-02 21:40:16,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761462706] [2021-05-02 21:40:16,926 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 21:40:16,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:40:16,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 21:40:16,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2021-05-02 21:40:16,927 INFO L87 Difference]: Start difference. First operand 137 states and 151 transitions. Second operand has 17 states, 17 states have (on average 6.0588235294117645) internal successors, (103), 16 states have internal predecessors, (103), 16 states have call successors, (18), 16 states have call predecessors, (18), 14 states have return successors, (16), 14 states have call predecessors, (16), 15 states have call successors, (16) [2021-05-02 21:40:17,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:40:17,166 INFO L93 Difference]: Finished difference Result 146 states and 161 transitions. [2021-05-02 21:40:17,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-02 21:40:17,173 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 6.0588235294117645) internal successors, (103), 16 states have internal predecessors, (103), 16 states have call successors, (18), 16 states have call predecessors, (18), 14 states have return successors, (16), 14 states have call predecessors, (16), 15 states have call successors, (16) Word has length 140 [2021-05-02 21:40:17,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:40:17,174 INFO L225 Difference]: With dead ends: 146 [2021-05-02 21:40:17,174 INFO L226 Difference]: Without dead ends: 146 [2021-05-02 21:40:17,176 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 237.9ms TimeCoverageRelationStatistics Valid=330, Invalid=540, Unknown=0, NotChecked=0, Total=870 [2021-05-02 21:40:17,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-05-02 21:40:17,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2021-05-02 21:40:17,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 110 states have (on average 1.1363636363636365) internal successors, (125), 110 states have internal predecessors, (125), 19 states have call successors, (19), 18 states have call predecessors, (19), 16 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 21:40:17,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 161 transitions. [2021-05-02 21:40:17,182 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 161 transitions. Word has length 140 [2021-05-02 21:40:17,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:40:17,184 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 161 transitions. [2021-05-02 21:40:17,184 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 6.0588235294117645) internal successors, (103), 16 states have internal predecessors, (103), 16 states have call successors, (18), 16 states have call predecessors, (18), 14 states have return successors, (16), 14 states have call predecessors, (16), 15 states have call successors, (16) [2021-05-02 21:40:17,184 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 161 transitions. [2021-05-02 21:40:17,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-05-02 21:40:17,185 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:40:17,185 INFO L523 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 14, 14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 21:40:17,401 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-02 21:40:17,401 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:40:17,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:40:17,402 INFO L82 PathProgramCache]: Analyzing trace with hash -229972872, now seen corresponding path program 14 times [2021-05-02 21:40:17,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:40:17,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226882457] [2021-05-02 21:40:17,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:40:17,408 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:40:17,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1938167490] [2021-05-02 21:40:17,409 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 [2021-05-02 21:40:17,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 21:40:17,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 21:40:17,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 21:40:17,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:40:17,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:17,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:17,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:17,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:17,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:17,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:17,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:17,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:17,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:17,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:17,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:17,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:17,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:17,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:17,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:17,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:17,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:17,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:17,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:17,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:17,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:17,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:17,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:17,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:17,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:17,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:17,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:17,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:17,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:17,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:17,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:17,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:17,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:17,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:17,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:17,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:17,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:17,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:17,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:17,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:17,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:17,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:17,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:17,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:17,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:17,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:17,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:17,859 INFO L134 CoverageAnalysis]: Checked inductivity of 879 backedges. 28 proven. 847 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 21:40:17,859 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:40:17,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226882457] [2021-05-02 21:40:17,860 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:40:17,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938167490] [2021-05-02 21:40:17,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938167490] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 21:40:17,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 21:40:17,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-02 21:40:17,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904792002] [2021-05-02 21:40:17,863 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 21:40:17,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:40:17,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 21:40:17,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2021-05-02 21:40:17,864 INFO L87 Difference]: Start difference. First operand 146 states and 161 transitions. Second operand has 18 states, 18 states have (on average 6.111111111111111) internal successors, (110), 17 states have internal predecessors, (110), 17 states have call successors, (19), 17 states have call predecessors, (19), 15 states have return successors, (17), 15 states have call predecessors, (17), 16 states have call successors, (17) [2021-05-02 21:40:18,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:40:18,120 INFO L93 Difference]: Finished difference Result 155 states and 171 transitions. [2021-05-02 21:40:18,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-02 21:40:18,121 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 6.111111111111111) internal successors, (110), 17 states have internal predecessors, (110), 17 states have call successors, (19), 17 states have call predecessors, (19), 15 states have return successors, (17), 15 states have call predecessors, (17), 16 states have call successors, (17) Word has length 149 [2021-05-02 21:40:18,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:40:18,131 INFO L225 Difference]: With dead ends: 155 [2021-05-02 21:40:18,131 INFO L226 Difference]: Without dead ends: 155 [2021-05-02 21:40:18,132 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 253.8ms TimeCoverageRelationStatistics Valid=376, Invalid=616, Unknown=0, NotChecked=0, Total=992 [2021-05-02 21:40:18,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-05-02 21:40:18,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2021-05-02 21:40:18,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 117 states have (on average 1.1367521367521367) internal successors, (133), 117 states have internal predecessors, (133), 20 states have call successors, (20), 19 states have call predecessors, (20), 17 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-02 21:40:18,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 171 transitions. [2021-05-02 21:40:18,140 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 171 transitions. Word has length 149 [2021-05-02 21:40:18,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:40:18,140 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 171 transitions. [2021-05-02 21:40:18,141 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 6.111111111111111) internal successors, (110), 17 states have internal predecessors, (110), 17 states have call successors, (19), 17 states have call predecessors, (19), 15 states have return successors, (17), 15 states have call predecessors, (17), 16 states have call successors, (17) [2021-05-02 21:40:18,141 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 171 transitions. [2021-05-02 21:40:18,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-05-02 21:40:18,141 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:40:18,142 INFO L523 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 15, 15, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 21:40:18,353 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-02 21:40:18,353 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:40:18,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:40:18,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1480022019, now seen corresponding path program 15 times [2021-05-02 21:40:18,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:40:18,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863608639] [2021-05-02 21:40:18,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:40:18,371 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:40:18,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1962309904] [2021-05-02 21:40:18,372 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:40:18,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-05-02 21:40:18,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 21:40:18,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-02 21:40:18,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:40:18,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:18,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:18,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:18,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:18,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:18,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:18,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:18,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:18,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:18,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:18,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:18,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:18,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:18,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:18,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:18,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:18,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:18,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:18,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:18,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:18,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:18,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:18,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:18,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:18,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:18,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:18,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:18,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:18,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:18,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:18,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:18,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:18,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:18,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:18,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:18,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:18,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:18,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:18,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:18,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:18,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:18,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:18,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:18,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:18,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:18,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:18,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:18,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:18,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:18,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:18,907 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 30 proven. 975 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 21:40:18,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:40:18,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863608639] [2021-05-02 21:40:18,908 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:40:18,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962309904] [2021-05-02 21:40:18,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962309904] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 21:40:18,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 21:40:18,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-05-02 21:40:18,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797448231] [2021-05-02 21:40:18,910 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-02 21:40:18,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:40:18,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-02 21:40:18,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2021-05-02 21:40:18,910 INFO L87 Difference]: Start difference. First operand 155 states and 171 transitions. Second operand has 19 states, 19 states have (on average 6.157894736842105) internal successors, (117), 18 states have internal predecessors, (117), 18 states have call successors, (20), 18 states have call predecessors, (20), 16 states have return successors, (18), 16 states have call predecessors, (18), 17 states have call successors, (18) [2021-05-02 21:40:19,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:40:19,162 INFO L93 Difference]: Finished difference Result 164 states and 181 transitions. [2021-05-02 21:40:19,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-02 21:40:19,162 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 6.157894736842105) internal successors, (117), 18 states have internal predecessors, (117), 18 states have call successors, (20), 18 states have call predecessors, (20), 16 states have return successors, (18), 16 states have call predecessors, (18), 17 states have call successors, (18) Word has length 158 [2021-05-02 21:40:19,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:40:19,163 INFO L225 Difference]: With dead ends: 164 [2021-05-02 21:40:19,163 INFO L226 Difference]: Without dead ends: 164 [2021-05-02 21:40:19,164 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 295.4ms TimeCoverageRelationStatistics Valid=425, Invalid=697, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 21:40:19,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-05-02 21:40:19,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2021-05-02 21:40:19,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 124 states have (on average 1.1370967741935485) internal successors, (141), 124 states have internal predecessors, (141), 21 states have call successors, (21), 20 states have call predecessors, (21), 18 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-02 21:40:19,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 181 transitions. [2021-05-02 21:40:19,168 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 181 transitions. Word has length 158 [2021-05-02 21:40:19,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:40:19,168 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 181 transitions. [2021-05-02 21:40:19,169 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 6.157894736842105) internal successors, (117), 18 states have internal predecessors, (117), 18 states have call successors, (20), 18 states have call predecessors, (20), 16 states have return successors, (18), 16 states have call predecessors, (18), 17 states have call successors, (18) [2021-05-02 21:40:19,169 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 181 transitions. [2021-05-02 21:40:19,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-05-02 21:40:19,170 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:40:19,170 INFO L523 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 16, 16, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 21:40:19,372 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:40:19,373 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:40:19,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:40:19,373 INFO L82 PathProgramCache]: Analyzing trace with hash 2105323736, now seen corresponding path program 16 times [2021-05-02 21:40:19,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:40:19,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526012138] [2021-05-02 21:40:19,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:40:19,379 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:40:19,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2132766081] [2021-05-02 21:40:19,380 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:40:19,464 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 21:40:19,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 21:40:19,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 21:40:19,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:40:19,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:19,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:19,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:19,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:19,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:19,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:19,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:19,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:19,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:19,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:19,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:19,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:19,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:19,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:19,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:19,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:19,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:19,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:19,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:19,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:19,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:19,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:19,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:19,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:19,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:19,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:19,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:19,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:19,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:19,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:19,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:19,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:19,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:19,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:19,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:19,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:19,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:19,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:19,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:19,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:19,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:19,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:19,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:19,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:19,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:19,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:19,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:19,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:19,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:19,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:19,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:19,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:19,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:19,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1148 backedges. 32 proven. 1112 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 21:40:19,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:40:19,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526012138] [2021-05-02 21:40:19,875 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:40:19,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132766081] [2021-05-02 21:40:19,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132766081] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 21:40:19,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 21:40:19,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-05-02 21:40:19,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922965773] [2021-05-02 21:40:19,876 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-02 21:40:19,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:40:19,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-02 21:40:19,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2021-05-02 21:40:19,877 INFO L87 Difference]: Start difference. First operand 164 states and 181 transitions. Second operand has 20 states, 20 states have (on average 6.2) internal successors, (124), 19 states have internal predecessors, (124), 19 states have call successors, (21), 19 states have call predecessors, (21), 17 states have return successors, (19), 17 states have call predecessors, (19), 18 states have call successors, (19) [2021-05-02 21:40:20,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:40:20,159 INFO L93 Difference]: Finished difference Result 173 states and 191 transitions. [2021-05-02 21:40:20,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-02 21:40:20,159 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 6.2) internal successors, (124), 19 states have internal predecessors, (124), 19 states have call successors, (21), 19 states have call predecessors, (21), 17 states have return successors, (19), 17 states have call predecessors, (19), 18 states have call successors, (19) Word has length 167 [2021-05-02 21:40:20,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:40:20,160 INFO L225 Difference]: With dead ends: 173 [2021-05-02 21:40:20,160 INFO L226 Difference]: Without dead ends: 173 [2021-05-02 21:40:20,161 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 316.5ms TimeCoverageRelationStatistics Valid=477, Invalid=783, Unknown=0, NotChecked=0, Total=1260 [2021-05-02 21:40:20,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-05-02 21:40:20,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2021-05-02 21:40:20,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 131 states have (on average 1.1374045801526718) internal successors, (149), 131 states have internal predecessors, (149), 22 states have call successors, (22), 21 states have call predecessors, (22), 19 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-02 21:40:20,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 191 transitions. [2021-05-02 21:40:20,165 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 191 transitions. Word has length 167 [2021-05-02 21:40:20,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:40:20,166 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 191 transitions. [2021-05-02 21:40:20,166 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 6.2) internal successors, (124), 19 states have internal predecessors, (124), 19 states have call successors, (21), 19 states have call predecessors, (21), 17 states have return successors, (19), 17 states have call predecessors, (19), 18 states have call successors, (19) [2021-05-02 21:40:20,166 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 191 transitions. [2021-05-02 21:40:20,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-05-02 21:40:20,167 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:40:20,167 INFO L523 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 17, 17, 17, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 21:40:20,384 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:40:20,385 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:40:20,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:40:20,385 INFO L82 PathProgramCache]: Analyzing trace with hash -170559581, now seen corresponding path program 17 times [2021-05-02 21:40:20,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:40:20,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692635766] [2021-05-02 21:40:20,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:40:20,391 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:40:20,391 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1151711150] [2021-05-02 21:40:20,391 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:40:20,490 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-05-02 21:40:20,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 21:40:20,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-02 21:40:20,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:40:20,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:20,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:20,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:20,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:20,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:20,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:20,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:20,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:20,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:20,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:20,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:20,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:20,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:20,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:20,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:20,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:20,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:20,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:20,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:20,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:20,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:20,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:20,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:20,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:20,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:20,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:20,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:20,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:20,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:20,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:20,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:20,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:20,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:20,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:20,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:20,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:20,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:20,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:20,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:20,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:20,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:20,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:20,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:20,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:20,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:20,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:20,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:20,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:20,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:20,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:20,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:20,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:20,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:20,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:20,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:20,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:20,964 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 34 proven. 1258 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 21:40:20,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:40:20,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692635766] [2021-05-02 21:40:20,965 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:40:20,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151711150] [2021-05-02 21:40:20,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151711150] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 21:40:20,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 21:40:20,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-05-02 21:40:20,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330725329] [2021-05-02 21:40:20,966 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-02 21:40:20,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:40:20,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-02 21:40:20,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2021-05-02 21:40:20,966 INFO L87 Difference]: Start difference. First operand 173 states and 191 transitions. Second operand has 21 states, 21 states have (on average 6.238095238095238) internal successors, (131), 20 states have internal predecessors, (131), 20 states have call successors, (22), 20 states have call predecessors, (22), 18 states have return successors, (20), 18 states have call predecessors, (20), 19 states have call successors, (20) [2021-05-02 21:40:21,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:40:21,274 INFO L93 Difference]: Finished difference Result 182 states and 201 transitions. [2021-05-02 21:40:21,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-02 21:40:21,274 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 6.238095238095238) internal successors, (131), 20 states have internal predecessors, (131), 20 states have call successors, (22), 20 states have call predecessors, (22), 18 states have return successors, (20), 18 states have call predecessors, (20), 19 states have call successors, (20) Word has length 176 [2021-05-02 21:40:21,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:40:21,275 INFO L225 Difference]: With dead ends: 182 [2021-05-02 21:40:21,275 INFO L226 Difference]: Without dead ends: 182 [2021-05-02 21:40:21,276 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 348.8ms TimeCoverageRelationStatistics Valid=532, Invalid=874, Unknown=0, NotChecked=0, Total=1406 [2021-05-02 21:40:21,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-05-02 21:40:21,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2021-05-02 21:40:21,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 138 states have (on average 1.1376811594202898) internal successors, (157), 138 states have internal predecessors, (157), 23 states have call successors, (23), 22 states have call predecessors, (23), 20 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 21:40:21,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 201 transitions. [2021-05-02 21:40:21,280 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 201 transitions. Word has length 176 [2021-05-02 21:40:21,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:40:21,280 INFO L480 AbstractCegarLoop]: Abstraction has 182 states and 201 transitions. [2021-05-02 21:40:21,281 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 6.238095238095238) internal successors, (131), 20 states have internal predecessors, (131), 20 states have call successors, (22), 20 states have call predecessors, (22), 18 states have return successors, (20), 18 states have call predecessors, (20), 19 states have call successors, (20) [2021-05-02 21:40:21,281 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 201 transitions. [2021-05-02 21:40:21,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-05-02 21:40:21,282 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:40:21,282 INFO L523 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 18, 18, 18, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 21:40:21,505 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-02 21:40:21,505 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:40:21,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:40:21,505 INFO L82 PathProgramCache]: Analyzing trace with hash -466082504, now seen corresponding path program 18 times [2021-05-02 21:40:21,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:40:21,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528989579] [2021-05-02 21:40:21,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:40:21,514 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:40:21,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [805306430] [2021-05-02 21:40:21,514 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:40:21,630 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-05-02 21:40:21,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 21:40:21,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-02 21:40:21,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:40:21,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:21,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:21,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:21,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:21,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:21,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:21,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:21,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:21,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:21,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:21,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:21,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:21,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:21,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:21,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:21,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:21,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:21,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:21,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:21,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:21,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:21,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:21,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:21,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:21,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:21,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:21,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:21,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:21,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:21,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:21,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:21,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:21,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:21,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:21,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:21,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:21,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:21,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:21,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:21,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:21,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:21,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:21,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:21,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:21,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:21,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:21,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:21,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:22,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:22,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:22,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:22,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:22,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:22,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:22,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:22,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:22,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:22,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:22,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:22,115 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 36 proven. 1413 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 21:40:22,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:40:22,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528989579] [2021-05-02 21:40:22,116 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:40:22,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805306430] [2021-05-02 21:40:22,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805306430] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 21:40:22,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 21:40:22,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-05-02 21:40:22,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57210757] [2021-05-02 21:40:22,116 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 21:40:22,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:40:22,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 21:40:22,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2021-05-02 21:40:22,117 INFO L87 Difference]: Start difference. First operand 182 states and 201 transitions. Second operand has 22 states, 22 states have (on average 6.2727272727272725) internal successors, (138), 21 states have internal predecessors, (138), 21 states have call successors, (23), 21 states have call predecessors, (23), 19 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) [2021-05-02 21:40:22,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:40:22,505 INFO L93 Difference]: Finished difference Result 191 states and 211 transitions. [2021-05-02 21:40:22,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-02 21:40:22,507 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 6.2727272727272725) internal successors, (138), 21 states have internal predecessors, (138), 21 states have call successors, (23), 21 states have call predecessors, (23), 19 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) Word has length 185 [2021-05-02 21:40:22,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:40:22,508 INFO L225 Difference]: With dead ends: 191 [2021-05-02 21:40:22,508 INFO L226 Difference]: Without dead ends: 191 [2021-05-02 21:40:22,509 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 389.9ms TimeCoverageRelationStatistics Valid=590, Invalid=970, Unknown=0, NotChecked=0, Total=1560 [2021-05-02 21:40:22,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-05-02 21:40:22,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2021-05-02 21:40:22,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 145 states have (on average 1.1379310344827587) internal successors, (165), 145 states have internal predecessors, (165), 24 states have call successors, (24), 23 states have call predecessors, (24), 21 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-05-02 21:40:22,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 211 transitions. [2021-05-02 21:40:22,513 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 211 transitions. Word has length 185 [2021-05-02 21:40:22,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:40:22,514 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 211 transitions. [2021-05-02 21:40:22,514 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 6.2727272727272725) internal successors, (138), 21 states have internal predecessors, (138), 21 states have call successors, (23), 21 states have call predecessors, (23), 19 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) [2021-05-02 21:40:22,514 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 211 transitions. [2021-05-02 21:40:22,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-05-02 21:40:22,515 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:40:22,515 INFO L523 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 19, 19, 19, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 21:40:22,725 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-02 21:40:22,725 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:40:22,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:40:22,725 INFO L82 PathProgramCache]: Analyzing trace with hash -733548733, now seen corresponding path program 19 times [2021-05-02 21:40:22,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:40:22,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110004640] [2021-05-02 21:40:22,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:40:22,743 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:40:22,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [382086472] [2021-05-02 21:40:22,743 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:40:22,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 21:40:22,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-02 21:40:22,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 21:40:22,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:22,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:22,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:22,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:22,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:22,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:22,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:22,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:22,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:22,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:22,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:22,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:22,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:22,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:22,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:22,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:22,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:22,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:22,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:22,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:22,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:22,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:22,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:22,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:23,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:23,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:23,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:23,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:23,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:23,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:23,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:23,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:23,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:23,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:23,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:23,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:23,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:23,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:23,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:23,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:23,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:23,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:23,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:23,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:23,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:23,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:23,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:23,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:23,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:23,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:23,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:23,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:23,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:23,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:23,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:23,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:23,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:23,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:23,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:23,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:23,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:23,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 21:40:23,375 INFO L134 CoverageAnalysis]: Checked inductivity of 1619 backedges. 38 proven. 1577 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 21:40:23,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 21:40:23,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110004640] [2021-05-02 21:40:23,376 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 21:40:23,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382086472] [2021-05-02 21:40:23,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382086472] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 21:40:23,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 21:40:23,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-05-02 21:40:23,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048327226] [2021-05-02 21:40:23,376 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-02 21:40:23,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 21:40:23,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-02 21:40:23,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2021-05-02 21:40:23,377 INFO L87 Difference]: Start difference. First operand 191 states and 211 transitions. Second operand has 23 states, 23 states have (on average 6.304347826086956) internal successors, (145), 22 states have internal predecessors, (145), 22 states have call successors, (24), 22 states have call predecessors, (24), 20 states have return successors, (22), 20 states have call predecessors, (22), 21 states have call successors, (22) [2021-05-02 21:40:23,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 21:40:23,736 INFO L93 Difference]: Finished difference Result 200 states and 221 transitions. [2021-05-02 21:40:23,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-02 21:40:23,737 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 6.304347826086956) internal successors, (145), 22 states have internal predecessors, (145), 22 states have call successors, (24), 22 states have call predecessors, (24), 20 states have return successors, (22), 20 states have call predecessors, (22), 21 states have call successors, (22) Word has length 194 [2021-05-02 21:40:23,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 21:40:23,737 INFO L225 Difference]: With dead ends: 200 [2021-05-02 21:40:23,738 INFO L226 Difference]: Without dead ends: 200 [2021-05-02 21:40:23,738 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 413.8ms TimeCoverageRelationStatistics Valid=651, Invalid=1071, Unknown=0, NotChecked=0, Total=1722 [2021-05-02 21:40:23,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-05-02 21:40:23,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2021-05-02 21:40:23,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 152 states have (on average 1.138157894736842) internal successors, (173), 152 states have internal predecessors, (173), 25 states have call successors, (25), 24 states have call predecessors, (25), 22 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2021-05-02 21:40:23,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 221 transitions. [2021-05-02 21:40:23,744 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 221 transitions. Word has length 194 [2021-05-02 21:40:23,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 21:40:23,744 INFO L480 AbstractCegarLoop]: Abstraction has 200 states and 221 transitions. [2021-05-02 21:40:23,744 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 6.304347826086956) internal successors, (145), 22 states have internal predecessors, (145), 22 states have call successors, (24), 22 states have call predecessors, (24), 20 states have return successors, (22), 20 states have call predecessors, (22), 21 states have call successors, (22) [2021-05-02 21:40:23,744 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 221 transitions. [2021-05-02 21:40:23,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2021-05-02 21:40:23,745 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 21:40:23,745 INFO L523 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 20, 20, 20, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 21:40:23,953 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:40:23,953 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 21:40:23,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 21:40:23,953 INFO L82 PathProgramCache]: Analyzing trace with hash -2040315496, now seen corresponding path program 20 times [2021-05-02 21:40:23,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 21:40:23,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351548814] [2021-05-02 21:40:23,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 21:40:23,958 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 21:40:23,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2025933845] [2021-05-02 21:40:23,958 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 21:40:24,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 21:40:24,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-05-02 21:40:24,059 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 21:40:24,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 21:40:24,111 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 21:40:24,366 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-02 21:40:24,366 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-02 21:40:24,581 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-05-02 21:40:24,693 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 09:40:24 BasicIcfg [2021-05-02 21:40:24,694 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 21:40:24,694 INFO L168 Benchmark]: Toolchain (without parser) took 18980.63 ms. Allocated memory was 127.9 MB in the beginning and 238.0 MB in the end (delta: 110.1 MB). Free memory was 93.0 MB in the beginning and 183.6 MB in the end (delta: -90.7 MB). Peak memory consumption was 20.1 MB. Max. memory is 8.0 GB. [2021-05-02 21:40:24,694 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 127.9 MB. Free memory is still 109.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 21:40:24,694 INFO L168 Benchmark]: CACSL2BoogieTranslator took 184.58 ms. Allocated memory is still 127.9 MB. Free memory was 92.7 MB in the beginning and 83.1 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-02 21:40:24,695 INFO L168 Benchmark]: Boogie Preprocessor took 78.62 ms. Allocated memory was 127.9 MB in the beginning and 194.0 MB in the end (delta: 66.1 MB). Free memory was 83.1 MB in the beginning and 177.4 MB in the end (delta: -94.3 MB). Peak memory consumption was 9.5 MB. Max. memory is 8.0 GB. [2021-05-02 21:40:24,695 INFO L168 Benchmark]: RCFGBuilder took 340.63 ms. Allocated memory is still 194.0 MB. Free memory was 176.9 MB in the beginning and 162.3 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-02 21:40:24,695 INFO L168 Benchmark]: IcfgTransformer took 35.39 ms. Allocated memory is still 194.0 MB. Free memory was 162.3 MB in the beginning and 161.2 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 21:40:24,695 INFO L168 Benchmark]: TraceAbstraction took 18316.74 ms. Allocated memory was 194.0 MB in the beginning and 238.0 MB in the end (delta: 44.0 MB). Free memory was 160.7 MB in the beginning and 183.6 MB in the end (delta: -22.9 MB). Peak memory consumption was 22.1 MB. Max. memory is 8.0 GB. [2021-05-02 21:40:24,695 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 127.9 MB. Free memory is still 109.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 184.58 ms. Allocated memory is still 127.9 MB. Free memory was 92.7 MB in the beginning and 83.1 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 78.62 ms. Allocated memory was 127.9 MB in the beginning and 194.0 MB in the end (delta: 66.1 MB). Free memory was 83.1 MB in the beginning and 177.4 MB in the end (delta: -94.3 MB). Peak memory consumption was 9.5 MB. Max. memory is 8.0 GB. * RCFGBuilder took 340.63 ms. Allocated memory is still 194.0 MB. Free memory was 176.9 MB in the beginning and 162.3 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 35.39 ms. Allocated memory is still 194.0 MB. Free memory was 162.3 MB in the beginning and 161.2 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 18316.74 ms. Allocated memory was 194.0 MB in the beginning and 238.0 MB in the end (delta: 44.0 MB). Free memory was 160.7 MB in the beginning and 183.6 MB in the end (delta: -22.9 MB). Peak memory consumption was 22.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 18]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L22] int counter = 0; VAL [\old(counter)=25, counter=0] [L24] int x1, x2; [L25] int y1, y2, y3; [L26] x1 = __VERIFIER_nondet_int() [L27] x2 = __VERIFIER_nondet_int() [L29] CALL assume_abort_if_not(x1 >= 0) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L13] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L29] RET assume_abort_if_not(x1 >= 0) VAL [\old(counter)=0, counter=0, x1=21, x2=1] [L30] CALL assume_abort_if_not(x2 != 0) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L13] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L30] RET assume_abort_if_not(x2 != 0) VAL [\old(counter)=0, counter=0, x1=21, x2=1] [L32] y1 = 0 [L33] y2 = 0 [L34] y3 = x1 VAL [\old(counter)=0, counter=0, x1=21, x2=1, y1=0, y2=0, y3=21] [L36] EXPR counter++ VAL [\old(counter)=0, counter=1, counter++=0, x1=21, x2=1, y1=0, y2=0, y3=21] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=1, x1=21, x2=1, y1=0, y2=0, y3=21] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=1, x1=21, x2=1, y1=0, y2=0, y3=21] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=1, x1=21, x2=1, y1=1, y2=0, y3=20] [L36] EXPR counter++ VAL [\old(counter)=0, counter=2, counter++=1, x1=21, x2=1, y1=1, y2=0, y3=20] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=2, x1=21, x2=1, y1=1, y2=0, y3=20] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=2, x1=21, x2=1, y1=1, y2=0, y3=20] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=2, x1=21, x2=1, y1=2, y2=0, y3=19] [L36] EXPR counter++ VAL [\old(counter)=0, counter=3, counter++=2, x1=21, x2=1, y1=2, y2=0, y3=19] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=3] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=3, x1=21, x2=1, y1=2, y2=0, y3=19] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=3, x1=21, x2=1, y1=2, y2=0, y3=19] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=3, x1=21, x2=1, y1=3, y2=0, y3=18] [L36] EXPR counter++ VAL [\old(counter)=0, counter=4, counter++=3, x1=21, x2=1, y1=3, y2=0, y3=18] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=4, x1=21, x2=1, y1=3, y2=0, y3=18] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=4, x1=21, x2=1, y1=3, y2=0, y3=18] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=4, x1=21, x2=1, y1=4, y2=0, y3=17] [L36] EXPR counter++ VAL [\old(counter)=0, counter=5, counter++=4, x1=21, x2=1, y1=4, y2=0, y3=17] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=5, x1=21, x2=1, y1=4, y2=0, y3=17] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=5, x1=21, x2=1, y1=4, y2=0, y3=17] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=5, x1=21, x2=1, y1=5, y2=0, y3=16] [L36] EXPR counter++ VAL [\old(counter)=0, counter=6, counter++=5, x1=21, x2=1, y1=5, y2=0, y3=16] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=6] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=6] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=6, x1=21, x2=1, y1=5, y2=0, y3=16] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=6, x1=21, x2=1, y1=5, y2=0, y3=16] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=6, x1=21, x2=1, y1=6, y2=0, y3=15] [L36] EXPR counter++ VAL [\old(counter)=0, counter=7, counter++=6, x1=21, x2=1, y1=6, y2=0, y3=15] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=7] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=7] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=7, x1=21, x2=1, y1=6, y2=0, y3=15] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=7, x1=21, x2=1, y1=6, y2=0, y3=15] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=7, x1=21, x2=1, y1=7, y2=0, y3=14] [L36] EXPR counter++ VAL [\old(counter)=0, counter=8, counter++=7, x1=21, x2=1, y1=7, y2=0, y3=14] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=8] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=8] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=8, x1=21, x2=1, y1=7, y2=0, y3=14] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=8, x1=21, x2=1, y1=7, y2=0, y3=14] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=8, x1=21, x2=1, y1=8, y2=0, y3=13] [L36] EXPR counter++ VAL [\old(counter)=0, counter=9, counter++=8, x1=21, x2=1, y1=8, y2=0, y3=13] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=9] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=9] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=9, x1=21, x2=1, y1=8, y2=0, y3=13] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=9, x1=21, x2=1, y1=8, y2=0, y3=13] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=9, x1=21, x2=1, y1=9, y2=0, y3=12] [L36] EXPR counter++ VAL [\old(counter)=0, counter=10, counter++=9, x1=21, x2=1, y1=9, y2=0, y3=12] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=10] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=10] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=10, x1=21, x2=1, y1=9, y2=0, y3=12] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=10, x1=21, x2=1, y1=9, y2=0, y3=12] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=10, x1=21, x2=1, y1=10, y2=0, y3=11] [L36] EXPR counter++ VAL [\old(counter)=0, counter=11, counter++=10, x1=21, x2=1, y1=10, y2=0, y3=11] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=11] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=11] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=11, x1=21, x2=1, y1=10, y2=0, y3=11] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=11, x1=21, x2=1, y1=10, y2=0, y3=11] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=11, x1=21, x2=1, y1=11, y2=0, y3=10] [L36] EXPR counter++ VAL [\old(counter)=0, counter=12, counter++=11, x1=21, x2=1, y1=11, y2=0, y3=10] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=12] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=12] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=12, x1=21, x2=1, y1=11, y2=0, y3=10] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=12, x1=21, x2=1, y1=11, y2=0, y3=10] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=12, x1=21, x2=1, y1=12, y2=0, y3=9] [L36] EXPR counter++ VAL [\old(counter)=0, counter=13, counter++=12, x1=21, x2=1, y1=12, y2=0, y3=9] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=13] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=13] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=13, x1=21, x2=1, y1=12, y2=0, y3=9] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=13, x1=21, x2=1, y1=12, y2=0, y3=9] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=13, x1=21, x2=1, y1=13, y2=0, y3=8] [L36] EXPR counter++ VAL [\old(counter)=0, counter=14, counter++=13, x1=21, x2=1, y1=13, y2=0, y3=8] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=14] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=14] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=14, x1=21, x2=1, y1=13, y2=0, y3=8] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=14, x1=21, x2=1, y1=13, y2=0, y3=8] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=14, x1=21, x2=1, y1=14, y2=0, y3=7] [L36] EXPR counter++ VAL [\old(counter)=0, counter=15, counter++=14, x1=21, x2=1, y1=14, y2=0, y3=7] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=15] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=15] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=15, x1=21, x2=1, y1=14, y2=0, y3=7] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=15, x1=21, x2=1, y1=14, y2=0, y3=7] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=15, x1=21, x2=1, y1=15, y2=0, y3=6] [L36] EXPR counter++ VAL [\old(counter)=0, counter=16, counter++=15, x1=21, x2=1, y1=15, y2=0, y3=6] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=16] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=16] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=16, x1=21, x2=1, y1=15, y2=0, y3=6] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=16, x1=21, x2=1, y1=15, y2=0, y3=6] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=16, x1=21, x2=1, y1=16, y2=0, y3=5] [L36] EXPR counter++ VAL [\old(counter)=0, counter=17, counter++=16, x1=21, x2=1, y1=16, y2=0, y3=5] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=17] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=17] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=17, x1=21, x2=1, y1=16, y2=0, y3=5] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=17, x1=21, x2=1, y1=16, y2=0, y3=5] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=17, x1=21, x2=1, y1=17, y2=0, y3=4] [L36] EXPR counter++ VAL [\old(counter)=0, counter=18, counter++=17, x1=21, x2=1, y1=17, y2=0, y3=4] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=18] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=18] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=18, x1=21, x2=1, y1=17, y2=0, y3=4] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=18, x1=21, x2=1, y1=17, y2=0, y3=4] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=18, x1=21, x2=1, y1=18, y2=0, y3=3] [L36] EXPR counter++ VAL [\old(counter)=0, counter=19, counter++=18, x1=21, x2=1, y1=18, y2=0, y3=3] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=19] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=19] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=19, x1=21, x2=1, y1=18, y2=0, y3=3] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=19, x1=21, x2=1, y1=18, y2=0, y3=3] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=19, x1=21, x2=1, y1=19, y2=0, y3=2] [L36] EXPR counter++ VAL [\old(counter)=0, counter=20, counter++=19, x1=21, x2=1, y1=19, y2=0, y3=2] [L36] COND TRUE counter++<20 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=20] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=20] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=20, x1=21, x2=1, y1=19, y2=0, y3=2] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=20, x1=21, x2=1, y1=19, y2=0, y3=2] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=20, x1=21, x2=1, y1=20, y2=0, y3=1] [L36] EXPR counter++ VAL [\old(counter)=0, counter=21, counter++=20, x1=21, x2=1, y1=20, y2=0, y3=1] [L36] COND FALSE !(counter++<20) [L50] CALL __VERIFIER_assert(y1*x2 + y2 == x1) VAL [\old(cond)=0, \old(counter)=0, counter=21] [L16] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=21] [L18] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=21] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 18129.7ms, OverallIterations: 24, TraceHistogramMax: 21, EmptinessCheckTime: 38.0ms, AutomataDifference: 4008.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 24.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 777 SDtfs, 1104 SDslu, 2456 SDs, 0 SdLazy, 1253 SolverSat, 512 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1310.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2406 GetRequests, 1963 SyntacticMatches, 0 SemanticMatches, 443 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1362 ImplicationChecksByTransitivity, 3711.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=200occurred in iteration=23, InterpolantAutomatonStates: 482, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 146.9ms AutomataMinimizationTime, 23 MinimizatonAttempts, 9 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 326.5ms SsaConstructionTime, 1129.9ms SatisfiabilityAnalysisTime, 6145.8ms InterpolantComputationTime, 2447 NumberOfCodeBlocks, 2447 NumberOfCodeBlocksAsserted, 127 NumberOfCheckSat, 2221 ConstructedInterpolants, 0 QuantifiedInterpolants, 6472 SizeOfPredicates, 216 NumberOfNonLiveVariables, 7175 ConjunctsInSsa, 516 ConjunctsInUnsatCore, 23 InterpolantComputations, 2 PerfectInterpolantSequences, 467/11114 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...