/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/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 14:50:48,280 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 14:50:48,283 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 14:50:48,328 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 14:50:48,329 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 14:50:48,330 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 14:50:48,331 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 14:50:48,333 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 14:50:48,335 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 14:50:48,342 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 14:50:48,343 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 14:50:48,344 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 14:50:48,345 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 14:50:48,347 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 14:50:48,349 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 14:50:48,351 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 14:50:48,355 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 14:50:48,358 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 14:50:48,362 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 14:50:48,367 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 14:50:48,371 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 14:50:48,372 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 14:50:48,373 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 14:50:48,376 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 14:50:48,380 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-05-02 14:50:48,381 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-05-02 14:50:48,381 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-05-02 14:50:48,382 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-05-02 14:50:48,383 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-05-02 14:50:48,383 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-05-02 14:50:48,384 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-02 14:50:48,384 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-02 14:50:48,385 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-02 14:50:48,386 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-02 14:50:48,386 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-02 14:50:48,387 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-02 14:50:48,387 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-02 14:50:48,387 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-02 14:50:48,388 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 14:50:48,388 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 14:50:48,389 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 14:50:48,390 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-02 14:50:48,438 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 14:50:48,438 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 14:50:48,441 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 14:50:48,442 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 14:50:48,442 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 14:50:48,442 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 14:50:48,442 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 14:50:48,443 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 14:50:48,443 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 14:50:48,443 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 14:50:48,444 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 14:50:48,444 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 14:50:48,444 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 14:50:48,444 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 14:50:48,444 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 14:50:48,444 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 14:50:48,445 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 14:50:48,445 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 14:50:48,445 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 14:50:48,445 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 14:50:48,445 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 14:50:48,446 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 14:50:48,446 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 14:50:48,446 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 14:50:48,446 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 14:50:48,446 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 14:50:48,446 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 14:50:48,446 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 14:50:48,447 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 14:50:48,788 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 14:50:48,813 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 14:50:48,815 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 14:50:48,816 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 14:50:48,817 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 14:50:48,818 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_unwindbound100.c [2021-05-02 14:50:48,895 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2574805c/868c71c00ea240eb9bebef9b8f415ea3/FLAG8456f724b [2021-05-02 14:50:49,517 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 14:50:49,517 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_unwindbound100.c [2021-05-02 14:50:49,528 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2574805c/868c71c00ea240eb9bebef9b8f415ea3/FLAG8456f724b [2021-05-02 14:50:49,855 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2574805c/868c71c00ea240eb9bebef9b8f415ea3 [2021-05-02 14:50:49,858 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 14:50:49,860 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 14:50:49,862 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 14:50:49,862 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 14:50:49,866 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 14:50:49,867 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 02:50:49" (1/1) ... [2021-05-02 14:50:49,868 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28201a3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:50:49, skipping insertion in model container [2021-05-02 14:50:49,868 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 02:50:49" (1/1) ... [2021-05-02 14:50:49,874 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 14:50:49,891 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 14:50:50,038 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_unwindbound100.c[490,503] [2021-05-02 14:50:50,059 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 14:50:50,066 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 14:50:50,082 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_unwindbound100.c[490,503] [2021-05-02 14:50:50,099 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 14:50:50,148 INFO L208 MainTranslator]: Completed translation [2021-05-02 14:50:50,149 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:50:50 WrapperNode [2021-05-02 14:50:50,149 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 14:50:50,150 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 14:50:50,150 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 14:50:50,150 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 14:50:50,158 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:50:50" (1/1) ... [2021-05-02 14:50:50,158 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:50:50" (1/1) ... [2021-05-02 14:50:50,164 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:50:50" (1/1) ... [2021-05-02 14:50:50,165 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:50:50" (1/1) ... [2021-05-02 14:50:50,170 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:50:50" (1/1) ... [2021-05-02 14:50:50,174 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:50:50" (1/1) ... [2021-05-02 14:50:50,175 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:50:50" (1/1) ... [2021-05-02 14:50:50,177 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 14:50:50,178 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 14:50:50,178 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 14:50:50,178 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 14:50:50,179 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:50:50" (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 14:50:50,261 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 14:50:50,262 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 14:50:50,262 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 14:50:50,262 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 14:50:50,262 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 14:50:50,263 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 14:50:50,263 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 14:50:50,263 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 14:50:50,264 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 14:50:50,264 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 14:50:50,264 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 14:50:50,264 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 14:50:50,265 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 14:50:50,265 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 14:50:50,266 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 14:50:50,266 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 14:50:50,266 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 14:50:50,266 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 14:50:50,266 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 14:50:50,266 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 14:50:50,514 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 14:50:50,514 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 14:50:50,516 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 02:50:50 BoogieIcfgContainer [2021-05-02 14:50:50,516 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 14:50:50,517 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 14:50:50,517 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 14:50:50,520 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 14:50:50,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 02:50:49" (1/3) ... [2021-05-02 14:50:50,521 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cb46483 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 02:50:50, skipping insertion in model container [2021-05-02 14:50:50,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:50:50" (2/3) ... [2021-05-02 14:50:50,521 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cb46483 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 02:50:50, skipping insertion in model container [2021-05-02 14:50:50,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 02:50:50" (3/3) ... [2021-05-02 14:50:50,522 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_unwindbound100.c [2021-05-02 14:50:50,527 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 14:50:50,531 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 14:50:50,546 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 14:50:50,565 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 14:50:50,565 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 14:50:50,565 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 14:50:50,566 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 14:50:50,566 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 14:50:50,566 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 14:50:50,566 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 14:50:50,566 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 14:50:50,580 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 23 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 14:50:50,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 14:50:50,585 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:50:50,586 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:50:50,586 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:50:50,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:50:50,591 INFO L82 PathProgramCache]: Analyzing trace with hash 1950618521, now seen corresponding path program 1 times [2021-05-02 14:50:50,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:50:50,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674429511] [2021-05-02 14:50:50,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:50:50,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:50:50,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 14:50:50,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:50:50,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 14:50:50,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:50:50,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-02 14:50:50,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:50:50,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 14:50:50,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:50:50,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 14:50:50,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:50:50,990 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 14:50:50,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:50:50,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674429511] [2021-05-02 14:50:50,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674429511] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:50:50,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:50:50,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 14:50:50,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781216616] [2021-05-02 14:50:50,996 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 14:50:50,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:50:51,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 14:50:51,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:50:51,011 INFO L87 Difference]: Start difference. First operand has 39 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 23 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 14:50:51,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:50:51,170 INFO L93 Difference]: Finished difference Result 72 states and 112 transitions. [2021-05-02 14:50:51,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 14:50:51,172 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2021-05-02 14:50:51,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:50:51,178 INFO L225 Difference]: With dead ends: 72 [2021-05-02 14:50:51,179 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 14:50:51,182 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 65.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:50:51,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 14:50:51,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2021-05-02 14:50:51,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 20 states have internal predecessors, (23), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 14:50:51,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2021-05-02 14:50:51,219 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 32 [2021-05-02 14:50:51,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:50:51,219 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2021-05-02 14:50:51,219 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 14:50:51,219 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2021-05-02 14:50:51,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 14:50:51,221 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:50:51,221 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:50:51,221 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 14:50:51,222 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:50:51,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:50:51,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1734391985, now seen corresponding path program 1 times [2021-05-02 14:50:51,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:50:51,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320083223] [2021-05-02 14:50:51,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:50:51,237 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:50:51,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [342056989] [2021-05-02 14:50:51,238 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 14:50:51,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:50:51,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 14:50:51,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:50:51,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:51,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:51,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:51,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:51,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:51,427 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 14:50:51,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:50:51,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320083223] [2021-05-02 14:50:51,428 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:50:51,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342056989] [2021-05-02 14:50:51,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342056989] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:50:51,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:50:51,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 14:50:51,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057461178] [2021-05-02 14:50:51,430 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 14:50:51,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:50:51,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 14:50:51,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 14:50:51,431 INFO L87 Difference]: Start difference. First operand 34 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 14:50:51,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:50:51,448 INFO L93 Difference]: Finished difference Result 44 states and 56 transitions. [2021-05-02 14:50:51,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 14:50:51,449 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-02 14:50:51,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:50:51,450 INFO L225 Difference]: With dead ends: 44 [2021-05-02 14:50:51,450 INFO L226 Difference]: Without dead ends: 36 [2021-05-02 14:50:51,451 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.0ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 14:50:51,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-02 14:50:51,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-05-02 14:50:51,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 20 states have (on average 1.25) internal successors, (25), 21 states have internal predecessors, (25), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 14:50:51,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 47 transitions. [2021-05-02 14:50:51,460 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 47 transitions. Word has length 33 [2021-05-02 14:50:51,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:50:51,462 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 47 transitions. [2021-05-02 14:50:51,462 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 14:50:51,462 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 47 transitions. [2021-05-02 14:50:51,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 14:50:51,463 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:50:51,463 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:50:51,687 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 14:50:51,688 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:50:51,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:50:51,688 INFO L82 PathProgramCache]: Analyzing trace with hash 2066454233, now seen corresponding path program 1 times [2021-05-02 14:50:51,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:50:51,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157373480] [2021-05-02 14:50:51,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:50:51,706 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:50:51,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [159309032] [2021-05-02 14:50:51,707 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 14:50:51,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:50:51,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 14:50:51,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:50:51,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:51,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:51,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:51,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:51,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:51,903 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 14:50:51,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:50:51,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157373480] [2021-05-02 14:50:51,904 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:50:51,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159309032] [2021-05-02 14:50:51,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159309032] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:50:51,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:50:51,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 14:50:51,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930524752] [2021-05-02 14:50:51,905 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 14:50:51,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:50:51,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 14:50:51,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 14:50:51,906 INFO L87 Difference]: Start difference. First operand 36 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 14:50:51,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:50:51,989 INFO L93 Difference]: Finished difference Result 53 states and 71 transitions. [2021-05-02 14:50:51,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 14:50:51,989 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2021-05-02 14:50:51,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:50:51,991 INFO L225 Difference]: With dead ends: 53 [2021-05-02 14:50:51,991 INFO L226 Difference]: Without dead ends: 45 [2021-05-02 14:50:51,991 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 27.6ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-02 14:50:51,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-02 14:50:51,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 37. [2021-05-02 14:50:51,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 22 states have internal predecessors, (26), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 14:50:52,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2021-05-02 14:50:52,000 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 34 [2021-05-02 14:50:52,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:50:52,000 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2021-05-02 14:50:52,001 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 14:50:52,001 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2021-05-02 14:50:52,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 14:50:52,002 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:50:52,002 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:50:52,224 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:50:52,225 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:50:52,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:50:52,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1678606280, now seen corresponding path program 1 times [2021-05-02 14:50:52,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:50:52,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643202838] [2021-05-02 14:50:52,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:50:52,254 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:50:52,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1999649905] [2021-05-02 14:50:52,254 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 14:50:52,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:50:52,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 14:50:52,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:50:52,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:52,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:52,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:52,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:52,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:52,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:52,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:52,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:52,455 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 14:50:52,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:50:52,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643202838] [2021-05-02 14:50:52,455 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:50:52,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999649905] [2021-05-02 14:50:52,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999649905] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:50:52,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:50:52,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 14:50:52,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597703492] [2021-05-02 14:50:52,456 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 14:50:52,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:50:52,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 14:50:52,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:50:52,458 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 14:50:52,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:50:52,609 INFO L93 Difference]: Finished difference Result 59 states and 81 transitions. [2021-05-02 14:50:52,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 14:50:52,610 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2021-05-02 14:50:52,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:50:52,613 INFO L225 Difference]: With dead ends: 59 [2021-05-02 14:50:52,613 INFO L226 Difference]: Without dead ends: 57 [2021-05-02 14:50:52,616 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 62.6ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-02 14:50:52,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-05-02 14:50:52,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 44. [2021-05-02 14:50:52,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 28 states have internal predecessors, (32), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 14:50:52,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2021-05-02 14:50:52,638 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 56 transitions. Word has length 36 [2021-05-02 14:50:52,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:50:52,639 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 56 transitions. [2021-05-02 14:50:52,639 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 14:50:52,640 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 56 transitions. [2021-05-02 14:50:52,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 14:50:52,641 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:50:52,641 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:50:52,857 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:50:52,857 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:50:52,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:50:52,858 INFO L82 PathProgramCache]: Analyzing trace with hash -2124209112, now seen corresponding path program 1 times [2021-05-02 14:50:52,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:50:52,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82178047] [2021-05-02 14:50:52,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:50:52,866 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:50:52,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1329334414] [2021-05-02 14:50:52,867 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 14:50:52,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:50:52,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 14:50:52,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:50:52,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:53,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:53,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:53,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:53,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:53,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:53,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:53,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:53,105 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 14:50:53,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:50:53,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82178047] [2021-05-02 14:50:53,105 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:50:53,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329334414] [2021-05-02 14:50:53,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329334414] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:50:53,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:50:53,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 14:50:53,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333951580] [2021-05-02 14:50:53,107 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 14:50:53,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:50:53,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 14:50:53,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 14:50:53,108 INFO L87 Difference]: Start difference. First operand 44 states and 56 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 14:50:53,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:50:53,174 INFO L93 Difference]: Finished difference Result 63 states and 83 transitions. [2021-05-02 14:50:53,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 14:50:53,175 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2021-05-02 14:50:53,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:50:53,180 INFO L225 Difference]: With dead ends: 63 [2021-05-02 14:50:53,180 INFO L226 Difference]: Without dead ends: 44 [2021-05-02 14:50:53,180 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 10.5ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 14:50:53,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-02 14:50:53,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-05-02 14:50:53,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 28 states have internal predecessors, (31), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 14:50:53,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 55 transitions. [2021-05-02 14:50:53,192 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 55 transitions. Word has length 39 [2021-05-02 14:50:53,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:50:53,193 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 55 transitions. [2021-05-02 14:50:53,193 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 14:50:53,193 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 55 transitions. [2021-05-02 14:50:53,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 14:50:53,198 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:50:53,198 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:50:53,412 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:50:53,413 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:50:53,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:50:53,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1052701339, now seen corresponding path program 1 times [2021-05-02 14:50:53,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:50:53,414 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917673754] [2021-05-02 14:50:53,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:50:53,424 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:50:53,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [274657288] [2021-05-02 14:50:53,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:50:53,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:50:53,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 14:50:53,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:50:53,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:53,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:53,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:53,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:53,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:53,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:53,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:53,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:53,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:53,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:53,642 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 14:50:53,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:50:53,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917673754] [2021-05-02 14:50:53,643 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:50:53,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274657288] [2021-05-02 14:50:53,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274657288] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:50:53,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:50:53,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 14:50:53,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171252742] [2021-05-02 14:50:53,643 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 14:50:53,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:50:53,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 14:50:53,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 14:50:53,644 INFO L87 Difference]: Start difference. First operand 44 states and 55 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 14:50:53,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:50:53,764 INFO L93 Difference]: Finished difference Result 58 states and 74 transitions. [2021-05-02 14:50:53,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 14:50:53,764 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 41 [2021-05-02 14:50:53,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:50:53,765 INFO L225 Difference]: With dead ends: 58 [2021-05-02 14:50:53,765 INFO L226 Difference]: Without dead ends: 56 [2021-05-02 14:50:53,766 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 45.8ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:50:53,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-02 14:50:53,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2021-05-02 14:50:53,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 32 states have (on average 1.21875) internal successors, (39), 34 states have internal predecessors, (39), 17 states have call successors, (17), 6 states have call predecessors, (17), 5 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 14:50:53,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 71 transitions. [2021-05-02 14:50:53,774 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 71 transitions. Word has length 41 [2021-05-02 14:50:53,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:50:53,775 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 71 transitions. [2021-05-02 14:50:53,775 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 14:50:53,775 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 71 transitions. [2021-05-02 14:50:53,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-02 14:50:53,776 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:50:53,776 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:50:53,985 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 14:50:53,985 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:50:53,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:50:53,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1531994984, now seen corresponding path program 1 times [2021-05-02 14:50:53,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:50:53,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732431345] [2021-05-02 14:50:53,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:50:53,994 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:50:53,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1885570163] [2021-05-02 14:50:53,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:50:54,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:50:54,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 14:50:54,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:50:54,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:54,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:54,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:54,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:54,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:54,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:54,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:54,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:54,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:54,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:54,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:54,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:54,267 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-05-02 14:50:54,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:50:54,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732431345] [2021-05-02 14:50:54,268 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:50:54,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885570163] [2021-05-02 14:50:54,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885570163] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:50:54,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:50:54,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 14:50:54,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520459997] [2021-05-02 14:50:54,269 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 14:50:54,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:50:54,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 14:50:54,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 14:50:54,270 INFO L87 Difference]: Start difference. First operand 55 states and 71 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 14:50:54,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:50:54,385 INFO L93 Difference]: Finished difference Result 62 states and 77 transitions. [2021-05-02 14:50:54,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 14:50:54,386 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2021-05-02 14:50:54,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:50:54,387 INFO L225 Difference]: With dead ends: 62 [2021-05-02 14:50:54,387 INFO L226 Difference]: Without dead ends: 60 [2021-05-02 14:50:54,387 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 42.1ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:50:54,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-02 14:50:54,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2021-05-02 14:50:54,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 35 states have (on average 1.2) internal successors, (42), 37 states have internal predecessors, (42), 17 states have call successors, (17), 7 states have call predecessors, (17), 6 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 14:50:54,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 74 transitions. [2021-05-02 14:50:54,396 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 74 transitions. Word has length 46 [2021-05-02 14:50:54,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:50:54,397 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 74 transitions. [2021-05-02 14:50:54,397 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 14:50:54,397 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 74 transitions. [2021-05-02 14:50:54,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-02 14:50:54,398 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:50:54,398 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:50:54,612 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:50:54,613 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:50:54,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:50:54,613 INFO L82 PathProgramCache]: Analyzing trace with hash -300711301, now seen corresponding path program 1 times [2021-05-02 14:50:54,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:50:54,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098884024] [2021-05-02 14:50:54,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:50:54,623 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:50:54,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1562064205] [2021-05-02 14:50:54,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:50:54,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:50:54,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 14:50:54,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:50:54,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:54,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:54,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:54,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:54,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:54,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:54,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:54,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:54,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:54,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:54,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:54,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:54,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:54,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:54,918 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-05-02 14:50:54,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:50:54,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098884024] [2021-05-02 14:50:54,918 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:50:54,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562064205] [2021-05-02 14:50:54,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562064205] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:50:54,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:50:54,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 14:50:54,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062378407] [2021-05-02 14:50:54,919 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 14:50:54,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:50:54,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 14:50:54,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:50:54,920 INFO L87 Difference]: Start difference. First operand 59 states and 74 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-02 14:50:57,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:50:57,140 INFO L93 Difference]: Finished difference Result 66 states and 80 transitions. [2021-05-02 14:50:57,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 14:50:57,141 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 51 [2021-05-02 14:50:57,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:50:57,142 INFO L225 Difference]: With dead ends: 66 [2021-05-02 14:50:57,142 INFO L226 Difference]: Without dead ends: 64 [2021-05-02 14:50:57,142 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 81.1ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-02 14:50:57,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-02 14:50:57,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2021-05-02 14:50:57,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 40 states have internal predecessors, (45), 17 states have call successors, (17), 8 states have call predecessors, (17), 7 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 14:50:57,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 77 transitions. [2021-05-02 14:50:57,150 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 77 transitions. Word has length 51 [2021-05-02 14:50:57,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:50:57,150 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 77 transitions. [2021-05-02 14:50:57,151 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-02 14:50:57,151 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 77 transitions. [2021-05-02 14:50:57,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-05-02 14:50:57,151 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:50:57,151 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:50:57,364 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:50:57,365 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:50:57,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:50:57,365 INFO L82 PathProgramCache]: Analyzing trace with hash -2044027516, now seen corresponding path program 1 times [2021-05-02 14:50:57,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:50:57,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352053354] [2021-05-02 14:50:57,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:50:57,375 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:50:57,388 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2142723321] [2021-05-02 14:50:57,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:50:57,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:50:57,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 14:50:57,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:50:57,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:57,608 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-05-02 14:50:57,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:50:57,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352053354] [2021-05-02 14:50:57,608 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:50:57,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142723321] [2021-05-02 14:50:57,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142723321] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:50:57,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:50:57,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 14:50:57,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829363163] [2021-05-02 14:50:57,610 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 14:50:57,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:50:57,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 14:50:57,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 14:50:57,610 INFO L87 Difference]: Start difference. First operand 63 states and 77 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-02 14:50:57,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:50:57,762 INFO L93 Difference]: Finished difference Result 96 states and 131 transitions. [2021-05-02 14:50:57,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 14:50:57,762 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 59 [2021-05-02 14:50:57,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:50:57,765 INFO L225 Difference]: With dead ends: 96 [2021-05-02 14:50:57,765 INFO L226 Difference]: Without dead ends: 94 [2021-05-02 14:50:57,767 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 56.3ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:50:57,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-05-02 14:50:57,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 84. [2021-05-02 14:50:57,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 52 states have internal predecessors, (61), 26 states have call successors, (26), 9 states have call predecessors, (26), 8 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-02 14:50:57,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 111 transitions. [2021-05-02 14:50:57,783 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 111 transitions. Word has length 59 [2021-05-02 14:50:57,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:50:57,784 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 111 transitions. [2021-05-02 14:50:57,784 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-02 14:50:57,784 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 111 transitions. [2021-05-02 14:50:57,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-05-02 14:50:57,784 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:50:57,784 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:50:58,009 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-02 14:50:58,009 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:50:58,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:50:58,009 INFO L82 PathProgramCache]: Analyzing trace with hash 35160305, now seen corresponding path program 1 times [2021-05-02 14:50:58,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:50:58,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020734385] [2021-05-02 14:50:58,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:50:58,021 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:50:58,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1416548675] [2021-05-02 14:50:58,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:50:58,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:50:58,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 14:50:58,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:50:58,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:58,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:58,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:58,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:58,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:58,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:58,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:58,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:58,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:58,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:58,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:58,222 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-05-02 14:50:58,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:50:58,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020734385] [2021-05-02 14:50:58,222 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:50:58,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416548675] [2021-05-02 14:50:58,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416548675] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:50:58,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:50:58,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 14:50:58,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750588192] [2021-05-02 14:50:58,224 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 14:50:58,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:50:58,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 14:50:58,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 14:50:58,225 INFO L87 Difference]: Start difference. First operand 84 states and 111 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-02 14:50:58,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:50:58,298 INFO L93 Difference]: Finished difference Result 107 states and 132 transitions. [2021-05-02 14:50:58,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 14:50:58,298 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 60 [2021-05-02 14:50:58,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:50:58,301 INFO L225 Difference]: With dead ends: 107 [2021-05-02 14:50:58,301 INFO L226 Difference]: Without dead ends: 99 [2021-05-02 14:50:58,302 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 20.2ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 14:50:58,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-05-02 14:50:58,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2021-05-02 14:50:58,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 61 states have (on average 1.1967213114754098) internal successors, (73), 64 states have internal predecessors, (73), 26 states have call successors, (26), 12 states have call predecessors, (26), 11 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-02 14:50:58,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 123 transitions. [2021-05-02 14:50:58,351 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 123 transitions. Word has length 60 [2021-05-02 14:50:58,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:50:58,352 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 123 transitions. [2021-05-02 14:50:58,352 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-02 14:50:58,352 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 123 transitions. [2021-05-02 14:50:58,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-02 14:50:58,355 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:50:58,355 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:50:58,568 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:50:58,569 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:50:58,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:50:58,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1088000375, now seen corresponding path program 1 times [2021-05-02 14:50:58,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:50:58,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899875581] [2021-05-02 14:50:58,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:50:58,582 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:50:58,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [447436676] [2021-05-02 14:50:58,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:50:58,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:50:58,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 14:50:58,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:50:58,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:58,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:58,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:58,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:58,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:58,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:58,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:58,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:58,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:58,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:58,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:58,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:58,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:58,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:58,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:58,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:58,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:58,816 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-05-02 14:50:58,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:50:58,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899875581] [2021-05-02 14:50:58,816 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:50:58,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447436676] [2021-05-02 14:50:58,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447436676] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:50:58,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:50:58,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 14:50:58,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530592431] [2021-05-02 14:50:58,817 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 14:50:58,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:50:58,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 14:50:58,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 14:50:58,817 INFO L87 Difference]: Start difference. First operand 99 states and 123 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 14:50:59,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:50:59,049 INFO L93 Difference]: Finished difference Result 178 states and 253 transitions. [2021-05-02 14:50:59,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 14:50:59,049 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 61 [2021-05-02 14:50:59,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:50:59,052 INFO L225 Difference]: With dead ends: 178 [2021-05-02 14:50:59,052 INFO L226 Difference]: Without dead ends: 170 [2021-05-02 14:50:59,052 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 87.0ms TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-05-02 14:50:59,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-05-02 14:50:59,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 142. [2021-05-02 14:50:59,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 87 states have (on average 1.2873563218390804) internal successors, (112), 91 states have internal predecessors, (112), 43 states have call successors, (43), 12 states have call predecessors, (43), 11 states have return successors, (41), 38 states have call predecessors, (41), 41 states have call successors, (41) [2021-05-02 14:50:59,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 196 transitions. [2021-05-02 14:50:59,078 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 196 transitions. Word has length 61 [2021-05-02 14:50:59,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:50:59,078 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 196 transitions. [2021-05-02 14:50:59,079 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 14:50:59,079 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 196 transitions. [2021-05-02 14:50:59,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-05-02 14:50:59,079 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:50:59,079 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:50:59,299 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:50:59,299 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:50:59,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:50:59,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1537891564, now seen corresponding path program 1 times [2021-05-02 14:50:59,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:50:59,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991417128] [2021-05-02 14:50:59,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:50:59,308 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:50:59,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1485026291] [2021-05-02 14:50:59,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:50:59,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:50:59,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 14:50:59,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:50:59,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:59,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:59,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:59,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:59,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:59,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:59,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:59,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:59,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:59,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:59,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:59,537 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-05-02 14:50:59,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:50:59,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991417128] [2021-05-02 14:50:59,537 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:50:59,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485026291] [2021-05-02 14:50:59,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485026291] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:50:59,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:50:59,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 14:50:59,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828950034] [2021-05-02 14:50:59,538 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 14:50:59,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:50:59,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 14:50:59,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 14:50:59,539 INFO L87 Difference]: Start difference. First operand 142 states and 196 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-02 14:50:59,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:50:59,625 INFO L93 Difference]: Finished difference Result 175 states and 244 transitions. [2021-05-02 14:50:59,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 14:50:59,626 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 62 [2021-05-02 14:50:59,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:50:59,631 INFO L225 Difference]: With dead ends: 175 [2021-05-02 14:50:59,631 INFO L226 Difference]: Without dead ends: 142 [2021-05-02 14:50:59,634 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 23.9ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-05-02 14:50:59,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-05-02 14:50:59,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2021-05-02 14:50:59,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 87 states have (on average 1.2758620689655173) internal successors, (111), 91 states have internal predecessors, (111), 43 states have call successors, (43), 12 states have call predecessors, (43), 11 states have return successors, (41), 38 states have call predecessors, (41), 41 states have call successors, (41) [2021-05-02 14:50:59,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 195 transitions. [2021-05-02 14:50:59,660 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 195 transitions. Word has length 62 [2021-05-02 14:50:59,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:50:59,660 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 195 transitions. [2021-05-02 14:50:59,661 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-02 14:50:59,661 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 195 transitions. [2021-05-02 14:50:59,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-02 14:50:59,662 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:50:59,662 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:50:59,886 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-02 14:50:59,887 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:50:59,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:50:59,887 INFO L82 PathProgramCache]: Analyzing trace with hash -385934262, now seen corresponding path program 1 times [2021-05-02 14:50:59,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:50:59,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662079814] [2021-05-02 14:50:59,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:50:59,896 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:50:59,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1997406066] [2021-05-02 14:50:59,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:50:59,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:50:59,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 14:50:59,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:50:59,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:59,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:50:59,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:00,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:00,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:00,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:00,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:00,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:00,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:00,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:00,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:00,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:00,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:00,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:00,119 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-05-02 14:51:00,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:51:00,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662079814] [2021-05-02 14:51:00,119 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:51:00,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997406066] [2021-05-02 14:51:00,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997406066] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:51:00,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:51:00,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 14:51:00,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962978364] [2021-05-02 14:51:00,120 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 14:51:00,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:51:00,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 14:51:00,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 14:51:00,120 INFO L87 Difference]: Start difference. First operand 142 states and 195 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-02 14:51:00,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:51:00,221 INFO L93 Difference]: Finished difference Result 245 states and 345 transitions. [2021-05-02 14:51:00,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 14:51:00,222 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 66 [2021-05-02 14:51:00,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:51:00,223 INFO L225 Difference]: With dead ends: 245 [2021-05-02 14:51:00,223 INFO L226 Difference]: Without dead ends: 169 [2021-05-02 14:51:00,224 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 31.6ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:51:00,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-05-02 14:51:00,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 167. [2021-05-02 14:51:00,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 105 states have (on average 1.2380952380952381) internal successors, (130), 108 states have internal predecessors, (130), 46 states have call successors, (46), 16 states have call predecessors, (46), 15 states have return successors, (44), 42 states have call predecessors, (44), 44 states have call successors, (44) [2021-05-02 14:51:00,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 220 transitions. [2021-05-02 14:51:00,238 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 220 transitions. Word has length 66 [2021-05-02 14:51:00,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:51:00,238 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 220 transitions. [2021-05-02 14:51:00,238 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-02 14:51:00,238 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 220 transitions. [2021-05-02 14:51:00,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-02 14:51:00,239 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:51:00,239 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:51:00,452 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-02 14:51:00,453 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:51:00,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:51:00,453 INFO L82 PathProgramCache]: Analyzing trace with hash 792554045, now seen corresponding path program 1 times [2021-05-02 14:51:00,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:51:00,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546185787] [2021-05-02 14:51:00,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:51:00,460 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:51:00,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1620794971] [2021-05-02 14:51:00,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:51:00,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:51:00,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-02 14:51:00,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:51:00,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:00,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:00,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:00,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:00,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:00,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:00,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:00,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:00,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:00,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:00,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:00,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:00,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:00,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:00,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:00,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:00,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:00,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:00,722 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 22 proven. 16 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-05-02 14:51:00,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:51:00,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546185787] [2021-05-02 14:51:00,723 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:51:00,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620794971] [2021-05-02 14:51:00,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620794971] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:51:00,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:51:00,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 14:51:00,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692183397] [2021-05-02 14:51:00,724 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 14:51:00,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:51:00,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 14:51:00,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:51:00,724 INFO L87 Difference]: Start difference. First operand 167 states and 220 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 14:51:00,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:51:00,983 INFO L93 Difference]: Finished difference Result 202 states and 269 transitions. [2021-05-02 14:51:00,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 14:51:00,983 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 68 [2021-05-02 14:51:00,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:51:00,985 INFO L225 Difference]: With dead ends: 202 [2021-05-02 14:51:00,985 INFO L226 Difference]: Without dead ends: 199 [2021-05-02 14:51:00,986 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 99.2ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-05-02 14:51:00,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-05-02 14:51:01,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 196. [2021-05-02 14:51:01,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 126 states have (on average 1.2619047619047619) internal successors, (159), 133 states have internal predecessors, (159), 53 states have call successors, (53), 17 states have call predecessors, (53), 16 states have return successors, (50), 45 states have call predecessors, (50), 50 states have call successors, (50) [2021-05-02 14:51:01,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 262 transitions. [2021-05-02 14:51:01,003 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 262 transitions. Word has length 68 [2021-05-02 14:51:01,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:51:01,003 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 262 transitions. [2021-05-02 14:51:01,003 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 14:51:01,004 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 262 transitions. [2021-05-02 14:51:01,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-05-02 14:51:01,004 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:51:01,004 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:51:01,228 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 14:51:01,229 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:51:01,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:51:01,229 INFO L82 PathProgramCache]: Analyzing trace with hash 783638790, now seen corresponding path program 2 times [2021-05-02 14:51:01,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:51:01,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781253406] [2021-05-02 14:51:01,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:51:01,236 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:51:01,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1071178423] [2021-05-02 14:51:01,236 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 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 14:51:01,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:51:01,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:51:01,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-02 14:51:01,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:51:01,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:01,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:01,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:01,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:01,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:01,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:01,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:01,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:01,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:01,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:01,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:01,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:01,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:01,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:01,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:01,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:01,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:01,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:01,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:01,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:01,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:01,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:01,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:01,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:01,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:01,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:01,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:01,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:01,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:01,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:01,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:01,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:01,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:01,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:01,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:01,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:01,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:01,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:01,580 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 12 proven. 20 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-05-02 14:51:01,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:51:01,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781253406] [2021-05-02 14:51:01,580 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:51:01,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071178423] [2021-05-02 14:51:01,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071178423] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:51:01,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:51:01,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 14:51:01,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975921705] [2021-05-02 14:51:01,581 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 14:51:01,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:51:01,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 14:51:01,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:51:01,582 INFO L87 Difference]: Start difference. First operand 196 states and 262 transitions. Second operand has 11 states, 10 states have (on average 2.8) internal successors, (28), 8 states have internal predecessors, (28), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-02 14:51:01,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:51:01,868 INFO L93 Difference]: Finished difference Result 224 states and 301 transitions. [2021-05-02 14:51:01,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 14:51:01,869 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.8) internal successors, (28), 8 states have internal predecessors, (28), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11) Word has length 73 [2021-05-02 14:51:01,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:51:01,871 INFO L225 Difference]: With dead ends: 224 [2021-05-02 14:51:01,871 INFO L226 Difference]: Without dead ends: 222 [2021-05-02 14:51:01,874 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 117.9ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-05-02 14:51:01,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-05-02 14:51:01,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 219. [2021-05-02 14:51:01,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 138 states have (on average 1.2681159420289856) internal successors, (175), 146 states have internal predecessors, (175), 62 states have call successors, (62), 19 states have call predecessors, (62), 18 states have return successors, (59), 53 states have call predecessors, (59), 59 states have call successors, (59) [2021-05-02 14:51:01,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 296 transitions. [2021-05-02 14:51:01,899 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 296 transitions. Word has length 73 [2021-05-02 14:51:01,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:51:01,899 INFO L480 AbstractCegarLoop]: Abstraction has 219 states and 296 transitions. [2021-05-02 14:51:01,899 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.8) internal successors, (28), 8 states have internal predecessors, (28), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-02 14:51:01,899 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 296 transitions. [2021-05-02 14:51:01,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-05-02 14:51:01,901 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:51:01,901 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:51:02,116 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:51:02,117 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:51:02,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:51:02,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1625446301, now seen corresponding path program 3 times [2021-05-02 14:51:02,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:51:02,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501374739] [2021-05-02 14:51:02,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:51:02,124 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:51:02,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1271418051] [2021-05-02 14:51:02,124 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 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 14:51:02,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 14:51:02,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:51:02,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-02 14:51:02,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:51:02,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:02,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:02,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:02,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:02,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:02,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:02,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:02,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:02,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:02,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:02,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:02,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:02,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:02,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:02,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:02,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:02,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:02,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:02,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:02,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:02,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:02,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:02,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:02,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:02,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:02,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:02,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:02,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:02,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:02,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:02,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:02,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:02,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:02,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:02,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:02,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:02,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:02,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:02,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:02,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:02,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:02,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:02,700 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 31 proven. 19 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-05-02 14:51:02,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:51:02,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501374739] [2021-05-02 14:51:02,700 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:51:02,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271418051] [2021-05-02 14:51:02,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271418051] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:51:02,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:51:02,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 14:51:02,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446923110] [2021-05-02 14:51:02,701 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 14:51:02,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:51:02,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 14:51:02,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-05-02 14:51:02,702 INFO L87 Difference]: Start difference. First operand 219 states and 296 transitions. Second operand has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 12 states have internal predecessors, (31), 6 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 14:51:03,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:51:03,146 INFO L93 Difference]: Finished difference Result 228 states and 304 transitions. [2021-05-02 14:51:03,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 14:51:03,146 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 12 states have internal predecessors, (31), 6 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) Word has length 78 [2021-05-02 14:51:03,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:51:03,148 INFO L225 Difference]: With dead ends: 228 [2021-05-02 14:51:03,148 INFO L226 Difference]: Without dead ends: 226 [2021-05-02 14:51:03,149 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 276.9ms TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-05-02 14:51:03,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-05-02 14:51:03,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 223. [2021-05-02 14:51:03,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 141 states have (on average 1.2624113475177305) internal successors, (178), 149 states have internal predecessors, (178), 62 states have call successors, (62), 20 states have call predecessors, (62), 19 states have return successors, (59), 53 states have call predecessors, (59), 59 states have call successors, (59) [2021-05-02 14:51:03,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 299 transitions. [2021-05-02 14:51:03,168 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 299 transitions. Word has length 78 [2021-05-02 14:51:03,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:51:03,168 INFO L480 AbstractCegarLoop]: Abstraction has 223 states and 299 transitions. [2021-05-02 14:51:03,168 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 12 states have internal predecessors, (31), 6 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 14:51:03,168 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 299 transitions. [2021-05-02 14:51:03,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-05-02 14:51:03,169 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:51:03,169 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:51:03,384 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-02 14:51:03,385 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:51:03,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:51:03,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1849570232, now seen corresponding path program 2 times [2021-05-02 14:51:03,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:51:03,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845456361] [2021-05-02 14:51:03,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:51:03,393 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:51:03,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [57388189] [2021-05-02 14:51:03,393 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:51:03,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:51:03,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:51:03,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 48 conjunts are in the unsatisfiable core [2021-05-02 14:51:03,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:51:03,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:03,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:03,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:03,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:03,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:03,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:03,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:03,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:03,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:03,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:03,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:03,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:03,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:03,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:03,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:03,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:03,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:03,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:03,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:03,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:03,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:03,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:03,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:03,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:03,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:03,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:03,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:03,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:03,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:03,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:03,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:03,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:03,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:03,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:03,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:03,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:03,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:03,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:03,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:03,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:03,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:03,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:03,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:03,826 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 41 proven. 36 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-05-02 14:51:03,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:51:03,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845456361] [2021-05-02 14:51:03,827 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:51:03,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57388189] [2021-05-02 14:51:03,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57388189] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:51:03,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:51:03,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 14:51:03,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329928813] [2021-05-02 14:51:03,827 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 14:51:03,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:51:03,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 14:51:03,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-05-02 14:51:03,828 INFO L87 Difference]: Start difference. First operand 223 states and 299 transitions. Second operand has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 11 states have internal predecessors, (30), 7 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) [2021-05-02 14:51:04,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:51:04,244 INFO L93 Difference]: Finished difference Result 237 states and 317 transitions. [2021-05-02 14:51:04,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 14:51:04,245 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 11 states have internal predecessors, (30), 7 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) Word has length 82 [2021-05-02 14:51:04,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:51:04,247 INFO L225 Difference]: With dead ends: 237 [2021-05-02 14:51:04,247 INFO L226 Difference]: Without dead ends: 235 [2021-05-02 14:51:04,247 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 219.5ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-05-02 14:51:04,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-05-02 14:51:04,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 228. [2021-05-02 14:51:04,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 144 states have (on average 1.2569444444444444) internal successors, (181), 153 states have internal predecessors, (181), 63 states have call successors, (63), 21 states have call predecessors, (63), 20 states have return successors, (60), 53 states have call predecessors, (60), 60 states have call successors, (60) [2021-05-02 14:51:04,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 304 transitions. [2021-05-02 14:51:04,267 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 304 transitions. Word has length 82 [2021-05-02 14:51:04,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:51:04,268 INFO L480 AbstractCegarLoop]: Abstraction has 228 states and 304 transitions. [2021-05-02 14:51:04,268 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 11 states have internal predecessors, (30), 7 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) [2021-05-02 14:51:04,268 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 304 transitions. [2021-05-02 14:51:04,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-05-02 14:51:04,269 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:51:04,269 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:51:04,484 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:51:04,485 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:51:04,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:51:04,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1768368813, now seen corresponding path program 1 times [2021-05-02 14:51:04,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:51:04,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385280171] [2021-05-02 14:51:04,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:51:04,492 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:51:04,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1961081031] [2021-05-02 14:51:04,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 14:51:04,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:51:04,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 14:51:04,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:51:04,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:04,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:04,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:04,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:04,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:04,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:04,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:04,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:04,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:04,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:04,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:04,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:04,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:04,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:04,736 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 16 proven. 73 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-05-02 14:51:04,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:51:04,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385280171] [2021-05-02 14:51:04,736 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:51:04,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961081031] [2021-05-02 14:51:04,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961081031] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:51:04,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:51:04,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 14:51:04,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022519512] [2021-05-02 14:51:04,739 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 14:51:04,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:51:04,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 14:51:04,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 14:51:04,740 INFO L87 Difference]: Start difference. First operand 228 states and 304 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-02 14:51:04,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:51:04,842 INFO L93 Difference]: Finished difference Result 238 states and 314 transitions. [2021-05-02 14:51:04,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 14:51:04,843 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) Word has length 83 [2021-05-02 14:51:04,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:51:04,845 INFO L225 Difference]: With dead ends: 238 [2021-05-02 14:51:04,845 INFO L226 Difference]: Without dead ends: 231 [2021-05-02 14:51:04,845 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 46.0ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:51:04,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-05-02 14:51:04,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2021-05-02 14:51:04,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 147 states have (on average 1.251700680272109) internal successors, (184), 156 states have internal predecessors, (184), 63 states have call successors, (63), 21 states have call predecessors, (63), 20 states have return successors, (60), 53 states have call predecessors, (60), 60 states have call successors, (60) [2021-05-02 14:51:04,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 307 transitions. [2021-05-02 14:51:04,865 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 307 transitions. Word has length 83 [2021-05-02 14:51:04,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:51:04,867 INFO L480 AbstractCegarLoop]: Abstraction has 231 states and 307 transitions. [2021-05-02 14:51:04,867 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-02 14:51:04,867 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 307 transitions. [2021-05-02 14:51:04,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-05-02 14:51:04,868 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:51:04,868 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:51:05,088 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-05-02 14:51:05,089 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:51:05,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:51:05,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1017110725, now seen corresponding path program 1 times [2021-05-02 14:51:05,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:51:05,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544500635] [2021-05-02 14:51:05,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:51:05,095 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:51:05,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1431065348] [2021-05-02 14:51:05,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:51:05,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:51:05,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-02 14:51:05,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:51:05,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:05,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:05,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:05,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:05,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:05,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:05,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:05,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:05,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:05,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:05,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:05,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:05,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:05,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:05,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:05,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:05,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:05,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:05,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:05,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:05,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:05,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:05,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:05,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:05,528 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 16 proven. 19 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2021-05-02 14:51:05,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:51:05,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544500635] [2021-05-02 14:51:05,528 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:51:05,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431065348] [2021-05-02 14:51:05,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431065348] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:51:05,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:51:05,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 14:51:05,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85723701] [2021-05-02 14:51:05,530 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 14:51:05,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:51:05,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 14:51:05,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-05-02 14:51:05,531 INFO L87 Difference]: Start difference. First operand 231 states and 307 transitions. Second operand has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-02 14:51:06,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:51:06,031 INFO L93 Difference]: Finished difference Result 263 states and 352 transitions. [2021-05-02 14:51:06,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 14:51:06,032 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 84 [2021-05-02 14:51:06,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:51:06,034 INFO L225 Difference]: With dead ends: 263 [2021-05-02 14:51:06,034 INFO L226 Difference]: Without dead ends: 260 [2021-05-02 14:51:06,034 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 282.7ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-05-02 14:51:06,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-05-02 14:51:06,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 257. [2021-05-02 14:51:06,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 162 states have (on average 1.2592592592592593) internal successors, (204), 172 states have internal predecessors, (204), 72 states have call successors, (72), 23 states have call predecessors, (72), 22 states have return successors, (69), 61 states have call predecessors, (69), 69 states have call successors, (69) [2021-05-02 14:51:06,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 345 transitions. [2021-05-02 14:51:06,054 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 345 transitions. Word has length 84 [2021-05-02 14:51:06,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:51:06,054 INFO L480 AbstractCegarLoop]: Abstraction has 257 states and 345 transitions. [2021-05-02 14:51:06,054 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-02 14:51:06,054 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 345 transitions. [2021-05-02 14:51:06,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-02 14:51:06,055 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:51:06,055 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:51:06,268 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-02 14:51:06,269 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:51:06,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:51:06,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1676300815, now seen corresponding path program 2 times [2021-05-02 14:51:06,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:51:06,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637389868] [2021-05-02 14:51:06,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:51:06,283 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:51:06,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1641318670] [2021-05-02 14:51:06,283 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 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 14:51:06,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:51:06,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:51:06,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-02 14:51:06,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:51:06,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:06,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:06,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:06,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:06,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:06,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:06,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:06,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:06,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:06,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:06,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:06,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:06,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:06,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:06,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:06,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:06,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:06,530 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 16 proven. 79 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-05-02 14:51:06,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:51:06,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637389868] [2021-05-02 14:51:06,531 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:51:06,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641318670] [2021-05-02 14:51:06,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641318670] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:51:06,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:51:06,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 14:51:06,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118030910] [2021-05-02 14:51:06,532 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 14:51:06,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:51:06,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 14:51:06,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 14:51:06,533 INFO L87 Difference]: Start difference. First operand 257 states and 345 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-02 14:51:06,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:51:06,666 INFO L93 Difference]: Finished difference Result 299 states and 386 transitions. [2021-05-02 14:51:06,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 14:51:06,667 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) Word has length 87 [2021-05-02 14:51:06,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:51:06,668 INFO L225 Difference]: With dead ends: 299 [2021-05-02 14:51:06,669 INFO L226 Difference]: Without dead ends: 292 [2021-05-02 14:51:06,669 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 45.8ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:51:06,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-05-02 14:51:06,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 291. [2021-05-02 14:51:06,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 187 states have (on average 1.2299465240641712) internal successors, (230), 196 states have internal predecessors, (230), 75 states have call successors, (75), 29 states have call predecessors, (75), 28 states have return successors, (72), 65 states have call predecessors, (72), 72 states have call successors, (72) [2021-05-02 14:51:06,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 377 transitions. [2021-05-02 14:51:06,693 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 377 transitions. Word has length 87 [2021-05-02 14:51:06,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:51:06,693 INFO L480 AbstractCegarLoop]: Abstraction has 291 states and 377 transitions. [2021-05-02 14:51:06,693 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-02 14:51:06,693 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 377 transitions. [2021-05-02 14:51:06,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-02 14:51:06,694 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:51:06,694 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:51:06,919 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-02 14:51:06,919 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:51:06,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:51:06,919 INFO L82 PathProgramCache]: Analyzing trace with hash -201422586, now seen corresponding path program 1 times [2021-05-02 14:51:06,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:51:06,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463012466] [2021-05-02 14:51:06,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:51:06,925 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:51:06,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [639026067] [2021-05-02 14:51:06,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 14:51:06,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:51:07,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-02 14:51:07,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:51:07,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:07,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:07,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:07,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:07,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:07,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:07,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:07,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:07,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:07,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:07,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:07,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:07,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:07,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:07,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:07,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:07,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:07,168 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 21 proven. 78 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-05-02 14:51:07,168 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:51:07,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463012466] [2021-05-02 14:51:07,168 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:51:07,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639026067] [2021-05-02 14:51:07,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639026067] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:51:07,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:51:07,168 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 14:51:07,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783704000] [2021-05-02 14:51:07,169 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 14:51:07,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:51:07,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 14:51:07,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 14:51:07,170 INFO L87 Difference]: Start difference. First operand 291 states and 377 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-02 14:51:07,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:51:07,306 INFO L93 Difference]: Finished difference Result 398 states and 543 transitions. [2021-05-02 14:51:07,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 14:51:07,306 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) Word has length 89 [2021-05-02 14:51:07,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:51:07,308 INFO L225 Difference]: With dead ends: 398 [2021-05-02 14:51:07,308 INFO L226 Difference]: Without dead ends: 293 [2021-05-02 14:51:07,309 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 45.3ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:51:07,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-05-02 14:51:07,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 293. [2021-05-02 14:51:07,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 189 states have (on average 1.216931216931217) internal successors, (230), 198 states have internal predecessors, (230), 75 states have call successors, (75), 29 states have call predecessors, (75), 28 states have return successors, (72), 65 states have call predecessors, (72), 72 states have call successors, (72) [2021-05-02 14:51:07,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 377 transitions. [2021-05-02 14:51:07,330 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 377 transitions. Word has length 89 [2021-05-02 14:51:07,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:51:07,330 INFO L480 AbstractCegarLoop]: Abstraction has 293 states and 377 transitions. [2021-05-02 14:51:07,332 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-02 14:51:07,332 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 377 transitions. [2021-05-02 14:51:07,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-05-02 14:51:07,333 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:51:07,333 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:51:07,540 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-02 14:51:07,541 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:51:07,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:51:07,541 INFO L82 PathProgramCache]: Analyzing trace with hash 325787368, now seen corresponding path program 2 times [2021-05-02 14:51:07,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:51:07,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287166031] [2021-05-02 14:51:07,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:51:07,547 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:51:07,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [603982924] [2021-05-02 14:51:07,547 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 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 14:51:07,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:51:07,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:51:07,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 14:51:07,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:51:07,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:07,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:07,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:07,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:07,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:07,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:07,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:07,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:07,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:07,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:07,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:07,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:07,779 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2021-05-02 14:51:07,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:51:07,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287166031] [2021-05-02 14:51:07,780 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:51:07,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603982924] [2021-05-02 14:51:07,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603982924] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:51:07,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:51:07,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 14:51:07,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836377725] [2021-05-02 14:51:07,780 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 14:51:07,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:51:07,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 14:51:07,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 14:51:07,781 INFO L87 Difference]: Start difference. First operand 293 states and 377 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-05-02 14:51:07,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:51:07,862 INFO L93 Difference]: Finished difference Result 451 states and 628 transitions. [2021-05-02 14:51:07,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 14:51:07,862 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 93 [2021-05-02 14:51:07,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:51:07,864 INFO L225 Difference]: With dead ends: 451 [2021-05-02 14:51:07,864 INFO L226 Difference]: Without dead ends: 343 [2021-05-02 14:51:07,866 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 21.5ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-02 14:51:07,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2021-05-02 14:51:07,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 310. [2021-05-02 14:51:07,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 200 states have (on average 1.225) internal successors, (245), 208 states have internal predecessors, (245), 81 states have call successors, (81), 29 states have call predecessors, (81), 28 states have return successors, (78), 72 states have call predecessors, (78), 78 states have call successors, (78) [2021-05-02 14:51:07,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 404 transitions. [2021-05-02 14:51:07,893 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 404 transitions. Word has length 93 [2021-05-02 14:51:07,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:51:07,893 INFO L480 AbstractCegarLoop]: Abstraction has 310 states and 404 transitions. [2021-05-02 14:51:07,893 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-05-02 14:51:07,893 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 404 transitions. [2021-05-02 14:51:07,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-05-02 14:51:07,895 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:51:07,896 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:51:08,115 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-02 14:51:08,116 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:51:08,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:51:08,116 INFO L82 PathProgramCache]: Analyzing trace with hash 1415088729, now seen corresponding path program 1 times [2021-05-02 14:51:08,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:51:08,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456757092] [2021-05-02 14:51:08,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:51:08,123 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:51:08,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [458978471] [2021-05-02 14:51:08,123 INFO L95 rtionOrderModulation]: Keeping assertion order 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 14:51:08,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:51:08,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 73 conjunts are in the unsatisfiable core [2021-05-02 14:51:08,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:51:08,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:08,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:08,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:08,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:08,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:08,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:08,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:08,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:08,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:08,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:08,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:08,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:08,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:08,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:08,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:08,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:08,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:08,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:08,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:08,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:08,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:08,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:08,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:08,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:08,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:08,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:08,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:08,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:08,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:08,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:08,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:08,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:08,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:08,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:08,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:08,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:08,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:08,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:08,914 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 84 proven. 53 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2021-05-02 14:51:08,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:51:08,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456757092] [2021-05-02 14:51:08,914 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:51:08,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458978471] [2021-05-02 14:51:08,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458978471] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:51:08,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:51:08,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-02 14:51:08,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403070311] [2021-05-02 14:51:08,915 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 14:51:08,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:51:08,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 14:51:08,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-05-02 14:51:08,916 INFO L87 Difference]: Start difference. First operand 310 states and 404 transitions. Second operand has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 12 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) [2021-05-02 14:51:13,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:51:13,578 INFO L93 Difference]: Finished difference Result 320 states and 413 transitions. [2021-05-02 14:51:13,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 14:51:13,579 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 12 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) Word has length 101 [2021-05-02 14:51:13,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:51:13,581 INFO L225 Difference]: With dead ends: 320 [2021-05-02 14:51:13,581 INFO L226 Difference]: Without dead ends: 318 [2021-05-02 14:51:13,582 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 84 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 527.3ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-05-02 14:51:13,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-05-02 14:51:13,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 314. [2021-05-02 14:51:13,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 203 states have (on average 1.2216748768472907) internal successors, (248), 211 states have internal predecessors, (248), 81 states have call successors, (81), 30 states have call predecessors, (81), 29 states have return successors, (78), 72 states have call predecessors, (78), 78 states have call successors, (78) [2021-05-02 14:51:13,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 407 transitions. [2021-05-02 14:51:13,620 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 407 transitions. Word has length 101 [2021-05-02 14:51:13,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:51:13,620 INFO L480 AbstractCegarLoop]: Abstraction has 314 states and 407 transitions. [2021-05-02 14:51:13,621 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 12 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) [2021-05-02 14:51:13,621 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 407 transitions. [2021-05-02 14:51:13,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-05-02 14:51:13,622 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:51:13,622 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:51:13,839 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:51:13,839 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:51:13,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:51:13,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1524088572, now seen corresponding path program 3 times [2021-05-02 14:51:13,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:51:13,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602785605] [2021-05-02 14:51:13,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:51:13,845 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:51:13,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [343910865] [2021-05-02 14:51:13,846 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 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 14:51:13,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 14:51:13,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:51:13,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 14:51:13,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:51:13,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:13,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:13,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:13,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:13,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:13,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:14,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:14,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:14,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:14,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:14,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:14,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:14,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:14,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:14,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:14,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:14,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:14,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:14,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:14,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:14,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:14,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:14,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:14,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:14,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:14,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:14,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:14,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:14,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:14,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:14,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:14,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:14,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:14,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:14,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:14,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:14,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:14,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:14,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:14,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:14,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:14,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:14,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:14,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:14,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:14,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:14,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:14,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:14,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:14,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:14,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:14,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:14,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:14,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:14,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:14,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:14,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:14,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:14,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:14,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:14,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:14,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:14,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:14,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:14,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:14,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:14,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:14,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:14,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:14,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:14,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:14,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:14,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:14,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:14,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:14,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:14,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:14,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:14,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:14,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:14,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:14,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:14,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:15,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:15,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:15,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:15,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:15,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:15,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:15,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:15,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:15,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:15,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:15,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:15,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:15,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:15,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:15,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:15,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:15,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:15,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:15,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:15,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:15,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:15,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:15,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:15,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:15,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:15,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:15,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:15,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:15,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:15,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:15,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:15,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:15,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:15,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:15,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:15,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:15,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:15,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:15,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:15,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:15,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:15,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:15,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:15,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:15,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:15,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:15,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:15,250 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 67 proven. 56 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2021-05-02 14:51:15,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:51:15,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602785605] [2021-05-02 14:51:15,250 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:51:15,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343910865] [2021-05-02 14:51:15,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343910865] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:51:15,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:51:15,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-02 14:51:15,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262828071] [2021-05-02 14:51:15,251 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 14:51:15,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:51:15,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 14:51:15,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-05-02 14:51:15,252 INFO L87 Difference]: Start difference. First operand 314 states and 407 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 12 states have internal predecessors, (33), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) [2021-05-02 14:51:20,371 WARN L205 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 31 [2021-05-02 14:51:27,519 WARN L205 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 31 [2021-05-02 14:51:29,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:51:29,666 INFO L93 Difference]: Finished difference Result 323 states and 416 transitions. [2021-05-02 14:51:29,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 14:51:29,667 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 12 states have internal predecessors, (33), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) Word has length 105 [2021-05-02 14:51:29,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:51:29,669 INFO L225 Difference]: With dead ends: 323 [2021-05-02 14:51:29,669 INFO L226 Difference]: Without dead ends: 321 [2021-05-02 14:51:29,669 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 4922.9ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-05-02 14:51:29,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-05-02 14:51:29,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 319. [2021-05-02 14:51:29,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 206 states have (on average 1.2184466019417475) internal successors, (251), 215 states have internal predecessors, (251), 82 states have call successors, (82), 31 states have call predecessors, (82), 30 states have return successors, (79), 72 states have call predecessors, (79), 79 states have call successors, (79) [2021-05-02 14:51:29,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 412 transitions. [2021-05-02 14:51:29,714 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 412 transitions. Word has length 105 [2021-05-02 14:51:29,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:51:29,716 INFO L480 AbstractCegarLoop]: Abstraction has 319 states and 412 transitions. [2021-05-02 14:51:29,716 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 12 states have internal predecessors, (33), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) [2021-05-02 14:51:29,716 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 412 transitions. [2021-05-02 14:51:29,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-05-02 14:51:29,717 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:51:29,717 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:51:29,932 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-05-02 14:51:29,933 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:51:29,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:51:29,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1761848073, now seen corresponding path program 2 times [2021-05-02 14:51:29,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:51:29,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178858179] [2021-05-02 14:51:29,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:51:29,940 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:51:29,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1649146245] [2021-05-02 14:51:29,940 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:51:30,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:51:30,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:51:30,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 66 conjunts are in the unsatisfiable core [2021-05-02 14:51:30,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:51:30,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:30,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:30,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:30,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:30,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:30,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:30,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:30,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:30,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:30,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:30,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:30,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:30,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:30,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:30,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:30,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:30,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:30,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:30,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:30,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:30,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:30,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:30,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:30,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:30,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:30,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:30,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:30,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:30,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:30,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:30,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:30,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:30,655 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 69 proven. 69 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2021-05-02 14:51:30,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:51:30,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178858179] [2021-05-02 14:51:30,655 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:51:30,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649146245] [2021-05-02 14:51:30,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649146245] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:51:30,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:51:30,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-02 14:51:30,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122440485] [2021-05-02 14:51:30,656 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 14:51:30,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:51:30,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 14:51:30,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-05-02 14:51:30,657 INFO L87 Difference]: Start difference. First operand 319 states and 412 transitions. Second operand has 17 states, 16 states have (on average 2.1875) internal successors, (35), 14 states have internal predecessors, (35), 8 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 6 states have call predecessors, (17), 7 states have call successors, (17) [2021-05-02 14:51:31,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:51:31,535 INFO L93 Difference]: Finished difference Result 353 states and 458 transitions. [2021-05-02 14:51:31,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 14:51:31,537 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.1875) internal successors, (35), 14 states have internal predecessors, (35), 8 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 6 states have call predecessors, (17), 7 states have call successors, (17) Word has length 107 [2021-05-02 14:51:31,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:51:31,540 INFO L225 Difference]: With dead ends: 353 [2021-05-02 14:51:31,540 INFO L226 Difference]: Without dead ends: 350 [2021-05-02 14:51:31,541 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 563.6ms TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-05-02 14:51:31,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-05-02 14:51:31,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 345. [2021-05-02 14:51:31,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 221 states have (on average 1.2217194570135748) internal successors, (270), 231 states have internal predecessors, (270), 91 states have call successors, (91), 33 states have call predecessors, (91), 32 states have return successors, (88), 80 states have call predecessors, (88), 88 states have call successors, (88) [2021-05-02 14:51:31,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 449 transitions. [2021-05-02 14:51:31,574 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 449 transitions. Word has length 107 [2021-05-02 14:51:31,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:51:31,575 INFO L480 AbstractCegarLoop]: Abstraction has 345 states and 449 transitions. [2021-05-02 14:51:31,575 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 2.1875) internal successors, (35), 14 states have internal predecessors, (35), 8 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 6 states have call predecessors, (17), 7 states have call successors, (17) [2021-05-02 14:51:31,576 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 449 transitions. [2021-05-02 14:51:31,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-05-02 14:51:31,578 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:51:31,578 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:51:31,802 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:51:31,802 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:51:31,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:51:31,803 INFO L82 PathProgramCache]: Analyzing trace with hash -2134846746, now seen corresponding path program 2 times [2021-05-02 14:51:31,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:51:31,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033178672] [2021-05-02 14:51:31,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:51:31,814 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:51:31,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1378333597] [2021-05-02 14:51:31,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:51:31,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:51:31,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:51:31,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-02 14:51:31,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:51:31,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:31,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:31,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:31,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:31,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:31,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:31,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:31,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:31,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:31,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:32,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:32,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:32,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:32,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:32,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:32,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:32,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:32,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:32,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:32,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:32,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:32,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:32,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:32,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:32,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:32,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:32,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:32,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:32,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:32,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:32,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:32,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:32,278 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 47 proven. 52 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2021-05-02 14:51:32,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:51:32,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033178672] [2021-05-02 14:51:32,278 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:51:32,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378333597] [2021-05-02 14:51:32,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378333597] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:51:32,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:51:32,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 14:51:32,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131690978] [2021-05-02 14:51:32,279 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 14:51:32,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:51:32,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 14:51:32,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-05-02 14:51:32,279 INFO L87 Difference]: Start difference. First operand 345 states and 449 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 13 states have internal predecessors, (37), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2021-05-02 14:51:33,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:51:33,137 INFO L93 Difference]: Finished difference Result 408 states and 545 transitions. [2021-05-02 14:51:33,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 14:51:33,153 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 13 states have internal predecessors, (37), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 109 [2021-05-02 14:51:33,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:51:33,155 INFO L225 Difference]: With dead ends: 408 [2021-05-02 14:51:33,156 INFO L226 Difference]: Without dead ends: 406 [2021-05-02 14:51:33,156 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 330.3ms TimeCoverageRelationStatistics Valid=111, Invalid=591, Unknown=0, NotChecked=0, Total=702 [2021-05-02 14:51:33,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2021-05-02 14:51:33,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 367. [2021-05-02 14:51:33,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 233 states have (on average 1.2274678111587982) internal successors, (286), 243 states have internal predecessors, (286), 99 states have call successors, (99), 35 states have call predecessors, (99), 34 states have return successors, (96), 88 states have call predecessors, (96), 96 states have call successors, (96) [2021-05-02 14:51:33,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 481 transitions. [2021-05-02 14:51:33,186 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 481 transitions. Word has length 109 [2021-05-02 14:51:33,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:51:33,186 INFO L480 AbstractCegarLoop]: Abstraction has 367 states and 481 transitions. [2021-05-02 14:51:33,186 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 13 states have internal predecessors, (37), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2021-05-02 14:51:33,186 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 481 transitions. [2021-05-02 14:51:33,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-05-02 14:51:33,187 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:51:33,188 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:51:33,408 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-05-02 14:51:33,409 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:51:33,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:51:33,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1514731471, now seen corresponding path program 2 times [2021-05-02 14:51:33,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:51:33,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956277533] [2021-05-02 14:51:33,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:51:33,415 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:51:33,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1484549625] [2021-05-02 14:51:33,415 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:51:33,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:51:33,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:51:33,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 14:51:33,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:51:33,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:33,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:33,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:33,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:33,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:33,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:33,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:33,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:33,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:33,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:33,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:33,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:33,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:33,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:33,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:33,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:33,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:33,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:33,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:33,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:33,700 INFO L134 CoverageAnalysis]: Checked inductivity of 341 backedges. 24 proven. 221 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-05-02 14:51:33,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:51:33,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956277533] [2021-05-02 14:51:33,701 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:51:33,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484549625] [2021-05-02 14:51:33,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484549625] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:51:33,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:51:33,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 14:51:33,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425726873] [2021-05-02 14:51:33,701 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 14:51:33,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:51:33,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 14:51:33,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:51:33,702 INFO L87 Difference]: Start difference. First operand 367 states and 481 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2021-05-02 14:51:33,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:51:33,919 INFO L93 Difference]: Finished difference Result 421 states and 531 transitions. [2021-05-02 14:51:33,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 14:51:33,919 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) Word has length 110 [2021-05-02 14:51:33,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:51:33,921 INFO L225 Difference]: With dead ends: 421 [2021-05-02 14:51:33,921 INFO L226 Difference]: Without dead ends: 414 [2021-05-02 14:51:33,922 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 75.0ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-05-02 14:51:33,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-05-02 14:51:33,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 413. [2021-05-02 14:51:33,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 267 states have (on average 1.202247191011236) internal successors, (321), 276 states have internal predecessors, (321), 102 states have call successors, (102), 44 states have call predecessors, (102), 43 states have return successors, (99), 92 states have call predecessors, (99), 99 states have call successors, (99) [2021-05-02 14:51:33,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 522 transitions. [2021-05-02 14:51:33,950 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 522 transitions. Word has length 110 [2021-05-02 14:51:33,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:51:33,951 INFO L480 AbstractCegarLoop]: Abstraction has 413 states and 522 transitions. [2021-05-02 14:51:33,951 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2021-05-02 14:51:33,951 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 522 transitions. [2021-05-02 14:51:33,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-05-02 14:51:33,952 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:51:33,952 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:51:34,164 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-05-02 14:51:34,165 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:51:34,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:51:34,165 INFO L82 PathProgramCache]: Analyzing trace with hash -289933735, now seen corresponding path program 3 times [2021-05-02 14:51:34,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:51:34,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51252786] [2021-05-02 14:51:34,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:51:34,171 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:51:34,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [19413238] [2021-05-02 14:51:34,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:51:34,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 14:51:34,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:51:34,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 14:51:34,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:51:34,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:34,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:34,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:34,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:34,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:34,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:34,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:34,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:34,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:34,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:34,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:34,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:34,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:34,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:34,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:34,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:34,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:34,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:34,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:34,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:34,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:34,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:34,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:34,464 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 44 proven. 11 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2021-05-02 14:51:34,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:51:34,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51252786] [2021-05-02 14:51:34,465 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:51:34,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19413238] [2021-05-02 14:51:34,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19413238] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:51:34,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:51:34,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 14:51:34,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79312642] [2021-05-02 14:51:34,466 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 14:51:34,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:51:34,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 14:51:34,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 14:51:34,467 INFO L87 Difference]: Start difference. First operand 413 states and 522 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 4 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-05-02 14:51:34,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:51:34,850 INFO L93 Difference]: Finished difference Result 583 states and 799 transitions. [2021-05-02 14:51:34,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 14:51:34,851 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 4 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 111 [2021-05-02 14:51:34,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:51:34,854 INFO L225 Difference]: With dead ends: 583 [2021-05-02 14:51:34,854 INFO L226 Difference]: Without dead ends: 574 [2021-05-02 14:51:34,855 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 141.9ms TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-05-02 14:51:34,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2021-05-02 14:51:34,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 457. [2021-05-02 14:51:34,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 297 states have (on average 1.2222222222222223) internal successors, (363), 304 states have internal predecessors, (363), 116 states have call successors, (116), 44 states have call predecessors, (116), 43 states have return successors, (113), 108 states have call predecessors, (113), 113 states have call successors, (113) [2021-05-02 14:51:34,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 592 transitions. [2021-05-02 14:51:34,891 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 592 transitions. Word has length 111 [2021-05-02 14:51:34,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:51:34,892 INFO L480 AbstractCegarLoop]: Abstraction has 457 states and 592 transitions. [2021-05-02 14:51:34,892 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 4 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-05-02 14:51:34,892 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 592 transitions. [2021-05-02 14:51:34,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-05-02 14:51:34,893 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:51:34,893 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:51:35,112 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-05-02 14:51:35,113 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:51:35,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:51:35,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1282766646, now seen corresponding path program 2 times [2021-05-02 14:51:35,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:51:35,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892937651] [2021-05-02 14:51:35,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:51:35,119 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:51:35,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [259454481] [2021-05-02 14:51:35,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:51:35,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:51:35,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:51:35,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 14:51:35,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:51:35,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:35,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:35,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:35,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:35,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:35,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:35,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:35,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:35,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:35,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:35,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:35,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:35,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:35,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:35,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:35,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:35,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:35,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:35,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:35,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:35,400 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 29 proven. 222 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-05-02 14:51:35,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:51:35,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892937651] [2021-05-02 14:51:35,400 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:51:35,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259454481] [2021-05-02 14:51:35,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259454481] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:51:35,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:51:35,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 14:51:35,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706773506] [2021-05-02 14:51:35,408 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 14:51:35,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:51:35,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 14:51:35,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:51:35,409 INFO L87 Difference]: Start difference. First operand 457 states and 592 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2021-05-02 14:51:35,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:51:35,634 INFO L93 Difference]: Finished difference Result 635 states and 863 transitions. [2021-05-02 14:51:35,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 14:51:35,634 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) Word has length 112 [2021-05-02 14:51:35,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:51:35,637 INFO L225 Difference]: With dead ends: 635 [2021-05-02 14:51:35,637 INFO L226 Difference]: Without dead ends: 459 [2021-05-02 14:51:35,639 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 74.6ms TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-05-02 14:51:35,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2021-05-02 14:51:35,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 459. [2021-05-02 14:51:35,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 299 states have (on average 1.2107023411371238) internal successors, (362), 306 states have internal predecessors, (362), 116 states have call successors, (116), 44 states have call predecessors, (116), 43 states have return successors, (113), 108 states have call predecessors, (113), 113 states have call successors, (113) [2021-05-02 14:51:35,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 591 transitions. [2021-05-02 14:51:35,676 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 591 transitions. Word has length 112 [2021-05-02 14:51:35,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:51:35,676 INFO L480 AbstractCegarLoop]: Abstraction has 459 states and 591 transitions. [2021-05-02 14:51:35,676 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2021-05-02 14:51:35,676 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 591 transitions. [2021-05-02 14:51:35,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-05-02 14:51:35,677 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:51:35,677 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:51:35,892 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-05-02 14:51:35,893 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:51:35,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:51:35,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1546024104, now seen corresponding path program 3 times [2021-05-02 14:51:35,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:51:35,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066087502] [2021-05-02 14:51:35,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:51:35,900 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:51:35,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [950161768] [2021-05-02 14:51:35,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:51:35,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 14:51:35,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:51:35,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 14:51:35,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:51:35,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:35,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:35,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:36,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:36,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:36,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:36,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:36,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:36,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:36,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:36,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:36,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:36,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:36,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:36,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:36,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:36,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:36,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:36,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:36,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:36,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:36,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:36,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:36,208 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 32 proven. 229 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-05-02 14:51:36,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:51:36,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066087502] [2021-05-02 14:51:36,209 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:51:36,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950161768] [2021-05-02 14:51:36,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950161768] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:51:36,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:51:36,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 14:51:36,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421824814] [2021-05-02 14:51:36,209 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 14:51:36,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:51:36,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 14:51:36,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:51:36,210 INFO L87 Difference]: Start difference. First operand 459 states and 591 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2021-05-02 14:51:36,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:51:36,483 INFO L93 Difference]: Finished difference Result 709 states and 937 transitions. [2021-05-02 14:51:36,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 14:51:36,484 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) Word has length 116 [2021-05-02 14:51:36,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:51:36,486 INFO L225 Difference]: With dead ends: 709 [2021-05-02 14:51:36,486 INFO L226 Difference]: Without dead ends: 533 [2021-05-02 14:51:36,488 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 94.7ms TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-05-02 14:51:36,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2021-05-02 14:51:36,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 523. [2021-05-02 14:51:36,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 344 states have (on average 1.191860465116279) internal successors, (410), 351 states have internal predecessors, (410), 124 states have call successors, (124), 55 states have call predecessors, (124), 54 states have return successors, (120), 116 states have call predecessors, (120), 120 states have call successors, (120) [2021-05-02 14:51:36,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 654 transitions. [2021-05-02 14:51:36,544 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 654 transitions. Word has length 116 [2021-05-02 14:51:36,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:51:36,544 INFO L480 AbstractCegarLoop]: Abstraction has 523 states and 654 transitions. [2021-05-02 14:51:36,545 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2021-05-02 14:51:36,545 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 654 transitions. [2021-05-02 14:51:36,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-05-02 14:51:36,548 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:51:36,548 INFO L523 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:51:36,773 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-05-02 14:51:36,773 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:51:36,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:51:36,773 INFO L82 PathProgramCache]: Analyzing trace with hash 992936989, now seen corresponding path program 3 times [2021-05-02 14:51:36,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:51:36,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667535528] [2021-05-02 14:51:36,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:51:36,779 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:51:36,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1490824780] [2021-05-02 14:51:36,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:51:36,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 14:51:36,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:51:36,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 59 conjunts are in the unsatisfiable core [2021-05-02 14:51:36,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:51:36,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:36,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:36,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:36,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:36,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:36,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:37,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:37,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:37,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:37,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:37,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:37,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:37,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:37,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:37,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:37,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:37,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:37,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:37,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:37,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:37,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:37,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:37,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:37,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:37,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:37,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:37,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:37,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:37,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:37,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:37,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:37,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:37,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:37,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:39,342 WARN L205 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 20 [2021-05-02 14:51:39,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:39,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:39,373 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 106 proven. 32 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2021-05-02 14:51:39,373 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:51:39,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667535528] [2021-05-02 14:51:39,373 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:51:39,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490824780] [2021-05-02 14:51:39,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490824780] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:51:39,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:51:39,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 14:51:39,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721516527] [2021-05-02 14:51:39,374 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 14:51:39,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:51:39,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 14:51:39,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-05-02 14:51:39,375 INFO L87 Difference]: Start difference. First operand 523 states and 654 transitions. Second operand has 13 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-02 14:51:45,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:51:45,808 INFO L93 Difference]: Finished difference Result 586 states and 744 transitions. [2021-05-02 14:51:45,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 14:51:45,809 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 124 [2021-05-02 14:51:45,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:51:45,811 INFO L225 Difference]: With dead ends: 586 [2021-05-02 14:51:45,812 INFO L226 Difference]: Without dead ends: 584 [2021-05-02 14:51:45,812 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 2217.2ms TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-05-02 14:51:45,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2021-05-02 14:51:45,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 560. [2021-05-02 14:51:45,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 370 states have (on average 1.2027027027027026) internal successors, (445), 378 states have internal predecessors, (445), 133 states have call successors, (133), 57 states have call predecessors, (133), 56 states have return successors, (129), 124 states have call predecessors, (129), 129 states have call successors, (129) [2021-05-02 14:51:45,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 707 transitions. [2021-05-02 14:51:45,861 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 707 transitions. Word has length 124 [2021-05-02 14:51:45,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:51:45,862 INFO L480 AbstractCegarLoop]: Abstraction has 560 states and 707 transitions. [2021-05-02 14:51:45,862 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-02 14:51:45,862 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 707 transitions. [2021-05-02 14:51:45,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-05-02 14:51:45,863 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:51:45,863 INFO L523 BasicCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:51:46,080 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:51:46,081 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:51:46,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:51:46,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1110867224, now seen corresponding path program 4 times [2021-05-02 14:51:46,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:51:46,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021762344] [2021-05-02 14:51:46,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:51:46,087 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:51:46,088 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [790408350] [2021-05-02 14:51:46,088 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:51:46,171 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 14:51:46,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:51:46,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 87 conjunts are in the unsatisfiable core [2021-05-02 14:51:46,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:51:46,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:46,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:46,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:46,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:46,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:46,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:46,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:46,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:46,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:46,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:46,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:46,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:46,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:46,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:46,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:46,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:46,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:46,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:46,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:46,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:46,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:46,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:46,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:46,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:46,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:46,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:46,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:46,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:46,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:46,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:46,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:46,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:46,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:46,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:46,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:46,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:46,992 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 83 proven. 135 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2021-05-02 14:51:46,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:51:46,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021762344] [2021-05-02 14:51:46,993 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:51:46,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790408350] [2021-05-02 14:51:46,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790408350] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:51:46,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:51:46,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-05-02 14:51:46,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572493552] [2021-05-02 14:51:46,993 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-02 14:51:46,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:51:46,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-02 14:51:46,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-05-02 14:51:46,994 INFO L87 Difference]: Start difference. First operand 560 states and 707 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 15 states have internal predecessors, (41), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 9 states have call predecessors, (19), 9 states have call successors, (19) [2021-05-02 14:51:47,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:51:47,905 INFO L93 Difference]: Finished difference Result 603 states and 762 transitions. [2021-05-02 14:51:47,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 14:51:47,906 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 15 states have internal predecessors, (41), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 9 states have call predecessors, (19), 9 states have call successors, (19) Word has length 123 [2021-05-02 14:51:47,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:51:47,909 INFO L225 Difference]: With dead ends: 603 [2021-05-02 14:51:47,909 INFO L226 Difference]: Without dead ends: 601 [2021-05-02 14:51:47,910 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 102 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 708.0ms TimeCoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-05-02 14:51:47,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2021-05-02 14:51:47,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 595. [2021-05-02 14:51:47,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 389 states have (on average 1.2030848329048842) internal successors, (468), 397 states have internal predecessors, (468), 145 states have call successors, (145), 61 states have call predecessors, (145), 60 states have return successors, (141), 136 states have call predecessors, (141), 141 states have call successors, (141) [2021-05-02 14:51:47,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 754 transitions. [2021-05-02 14:51:47,956 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 754 transitions. Word has length 123 [2021-05-02 14:51:47,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:51:47,956 INFO L480 AbstractCegarLoop]: Abstraction has 595 states and 754 transitions. [2021-05-02 14:51:47,956 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 15 states have internal predecessors, (41), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 9 states have call predecessors, (19), 9 states have call successors, (19) [2021-05-02 14:51:47,957 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 754 transitions. [2021-05-02 14:51:47,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-05-02 14:51:47,957 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:51:47,958 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:51:48,172 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:51:48,173 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:51:48,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:51:48,173 INFO L82 PathProgramCache]: Analyzing trace with hash -454805304, now seen corresponding path program 4 times [2021-05-02 14:51:48,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:51:48,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29356485] [2021-05-02 14:51:48,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:51:48,182 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:51:48,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1027703133] [2021-05-02 14:51:48,182 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:51:48,240 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 14:51:48,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:51:48,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 50 conjunts are in the unsatisfiable core [2021-05-02 14:51:48,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:51:48,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:48,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:48,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:48,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:48,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:48,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:48,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:48,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:48,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:48,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:48,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:48,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:48,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:48,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:48,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:48,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:48,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:48,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:48,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:48,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:48,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:48,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:48,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:48,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:48,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:48,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:48,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:48,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:48,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:48,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:48,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:48,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:48,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:48,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:48,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:48,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:48,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:48,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:48,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:49,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:49,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:51:49,150 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 92 proven. 123 refuted. 0 times theorem prover too weak. 375 trivial. 0 not checked. [2021-05-02 14:51:49,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:51:49,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29356485] [2021-05-02 14:51:49,150 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:51:49,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027703133] [2021-05-02 14:51:49,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027703133] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:51:49,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:51:49,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-02 14:51:49,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783166194] [2021-05-02 14:51:49,151 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 14:51:49,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:51:49,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 14:51:49,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-05-02 14:51:49,152 INFO L87 Difference]: Start difference. First operand 595 states and 754 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 13 states have internal predecessors, (36), 10 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 7 states have call predecessors, (21), 9 states have call successors, (21) [2021-05-02 14:51:52,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:51:52,849 INFO L93 Difference]: Finished difference Result 602 states and 760 transitions. [2021-05-02 14:51:52,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 14:51:52,850 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 13 states have internal predecessors, (36), 10 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 7 states have call predecessors, (21), 9 states have call successors, (21) Word has length 128 [2021-05-02 14:51:52,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:51:52,853 INFO L225 Difference]: With dead ends: 602 [2021-05-02 14:51:52,853 INFO L226 Difference]: Without dead ends: 598 [2021-05-02 14:51:52,853 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 713.8ms TimeCoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2021-05-02 14:51:52,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2021-05-02 14:51:52,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 597. [2021-05-02 14:51:52,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 597 states, 391 states have (on average 1.1994884910485935) internal successors, (469), 398 states have internal predecessors, (469), 145 states have call successors, (145), 62 states have call predecessors, (145), 60 states have return successors, (141), 136 states have call predecessors, (141), 141 states have call successors, (141) [2021-05-02 14:51:52,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 755 transitions. [2021-05-02 14:51:52,897 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 755 transitions. Word has length 128 [2021-05-02 14:51:52,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:51:52,897 INFO L480 AbstractCegarLoop]: Abstraction has 597 states and 755 transitions. [2021-05-02 14:51:52,897 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 13 states have internal predecessors, (36), 10 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 7 states have call predecessors, (21), 9 states have call successors, (21) [2021-05-02 14:51:52,897 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 755 transitions. [2021-05-02 14:51:52,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-05-02 14:51:52,898 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:51:52,898 INFO L523 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:51:53,122 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-05-02 14:51:53,123 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:51:53,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:51:53,123 INFO L82 PathProgramCache]: Analyzing trace with hash -270396677, now seen corresponding path program 5 times [2021-05-02 14:51:53,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:51:53,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154157171] [2021-05-02 14:51:53,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:51:53,128 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:51:53,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1573268068] [2021-05-02 14:51:53,129 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true