/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/egcd3-ll_valuebound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 02:38:10,783 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 02:38:10,786 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 02:38:10,829 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 02:38:10,830 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 02:38:10,834 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 02:38:10,837 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 02:38:10,842 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 02:38:10,844 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 02:38:10,851 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 02:38:10,852 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 02:38:10,853 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 02:38:10,853 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 02:38:10,855 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 02:38:10,857 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 02:38:10,858 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 02:38:10,861 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 02:38:10,862 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 02:38:10,864 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 02:38:10,869 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 02:38:10,871 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 02:38:10,872 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 02:38:10,873 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 02:38:10,875 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 02:38:10,879 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-05-06 02:38:10,880 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-05-06 02:38:10,880 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-05-06 02:38:10,882 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-05-06 02:38:10,882 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-05-06 02:38:10,883 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-05-06 02:38:10,883 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-06 02:38:10,884 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-06 02:38:10,885 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-06 02:38:10,888 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-06 02:38:10,889 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-06 02:38:10,889 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-06 02:38:10,889 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-06 02:38:10,890 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-06 02:38:10,890 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 02:38:10,891 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 02:38:10,891 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 02:38:10,892 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 [2021-05-06 02:38:10,945 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 02:38:10,946 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 02:38:10,948 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 02:38:10,949 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 02:38:10,949 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 02:38:10,949 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 02:38:10,949 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 02:38:10,949 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 02:38:10,949 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 02:38:10,950 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 02:38:10,950 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 02:38:10,950 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 02:38:10,950 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 02:38:10,951 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 02:38:10,951 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 02:38:10,951 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 02:38:10,951 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 02:38:10,951 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 02:38:10,951 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 02:38:10,951 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 02:38:10,952 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 02:38:10,952 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 02:38:10,952 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 02:38:10,952 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 02:38:10,952 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 02:38:10,952 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 02:38:10,952 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 02:38:10,953 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 02:38:10,953 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 02:38:11,279 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 02:38:11,309 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 02:38:11,311 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 02:38:11,312 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 02:38:11,321 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 02:38:11,322 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound5.c [2021-05-06 02:38:11,384 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d01f4061/41cec2508ddf4dccb5b6512182cf5dc0/FLAGe99241b96 [2021-05-06 02:38:11,853 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 02:38:11,853 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound5.c [2021-05-06 02:38:11,864 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d01f4061/41cec2508ddf4dccb5b6512182cf5dc0/FLAGe99241b96 [2021-05-06 02:38:12,248 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d01f4061/41cec2508ddf4dccb5b6512182cf5dc0 [2021-05-06 02:38:12,250 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 02:38:12,251 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 02:38:12,254 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 02:38:12,254 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 02:38:12,260 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 02:38:12,261 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 02:38:12" (1/1) ... [2021-05-06 02:38:12,262 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b78793 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:38:12, skipping insertion in model container [2021-05-06 02:38:12,262 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 02:38:12" (1/1) ... [2021-05-06 02:38:12,268 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 02:38:12,284 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 02:38:12,434 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/egcd3-ll_valuebound5.c[490,503] [2021-05-06 02:38:12,461 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 02:38:12,468 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 02:38:12,519 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/egcd3-ll_valuebound5.c[490,503] [2021-05-06 02:38:12,539 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 02:38:12,556 INFO L208 MainTranslator]: Completed translation [2021-05-06 02:38:12,556 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:38:12 WrapperNode [2021-05-06 02:38:12,557 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 02:38:12,558 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 02:38:12,558 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 02:38:12,559 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 02:38:12,567 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:38:12" (1/1) ... [2021-05-06 02:38:12,568 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:38:12" (1/1) ... [2021-05-06 02:38:12,582 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:38:12" (1/1) ... [2021-05-06 02:38:12,582 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:38:12" (1/1) ... [2021-05-06 02:38:12,595 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:38:12" (1/1) ... [2021-05-06 02:38:12,599 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:38:12" (1/1) ... [2021-05-06 02:38:12,606 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:38:12" (1/1) ... [2021-05-06 02:38:12,607 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 02:38:12,608 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 02:38:12,608 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 02:38:12,608 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 02:38:12,609 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:38:12" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 02:38:12,687 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 02:38:12,687 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 02:38:12,688 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 02:38:12,688 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 02:38:12,688 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 02:38:12,688 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 02:38:12,689 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 02:38:12,689 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 02:38:12,689 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 02:38:12,690 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 02:38:12,690 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 02:38:12,690 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 02:38:12,691 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 02:38:12,691 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 02:38:12,691 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 02:38:12,691 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 02:38:12,692 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 02:38:12,692 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 02:38:12,692 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 02:38:12,692 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 02:38:13,017 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 02:38:13,017 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-05-06 02:38:13,018 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 02:38:13 BoogieIcfgContainer [2021-05-06 02:38:13,019 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 02:38:13,020 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 02:38:13,020 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 02:38:13,023 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 02:38:13,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 02:38:12" (1/3) ... [2021-05-06 02:38:13,024 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37af5b92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 02:38:13, skipping insertion in model container [2021-05-06 02:38:13,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:38:12" (2/3) ... [2021-05-06 02:38:13,024 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37af5b92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 02:38:13, skipping insertion in model container [2021-05-06 02:38:13,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 02:38:13" (3/3) ... [2021-05-06 02:38:13,025 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound5.c [2021-05-06 02:38:13,030 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 02:38:13,034 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 02:38:13,051 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 02:38:13,071 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 02:38:13,071 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 02:38:13,071 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 02:38:13,071 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 02:38:13,071 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 02:38:13,071 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 02:38:13,071 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 02:38:13,072 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 02:38:13,085 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 02:38:13,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 02:38:13,090 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:38:13,091 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:38:13,092 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:38:13,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:38:13,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1237885594, now seen corresponding path program 1 times [2021-05-06 02:38:13,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:38:13,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695948177] [2021-05-06 02:38:13,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:38:13,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:38:13,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 02:38:13,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:38:13,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 02:38:13,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:38:13,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 02:38:13,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:38:13,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 02:38:13,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:38:13,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-06 02:38:13,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:38:13,418 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 02:38:13,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:38:13,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695948177] [2021-05-06 02:38:13,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695948177] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:38:13,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:38:13,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 02:38:13,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263410705] [2021-05-06 02:38:13,423 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 02:38:13,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:38:13,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 02:38:13,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 02:38:13,440 INFO L87 Difference]: Start difference. First operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 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) [2021-05-06 02:38:13,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:38:13,602 INFO L93 Difference]: Finished difference Result 73 states and 115 transitions. [2021-05-06 02:38:13,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 02:38:13,622 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 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 33 [2021-05-06 02:38:13,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:38:13,628 INFO L225 Difference]: With dead ends: 73 [2021-05-06 02:38:13,628 INFO L226 Difference]: Without dead ends: 35 [2021-05-06 02:38:13,631 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 82.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 02:38:13,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-06 02:38:13,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-06 02:38:13,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 02:38:13,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2021-05-06 02:38:13,670 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 33 [2021-05-06 02:38:13,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:38:13,671 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2021-05-06 02:38:13,671 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 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) [2021-05-06 02:38:13,671 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2021-05-06 02:38:13,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-06 02:38:13,673 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:38:13,673 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:38:13,673 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 02:38:13,673 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:38:13,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:38:13,674 INFO L82 PathProgramCache]: Analyzing trace with hash 1569470122, now seen corresponding path program 1 times [2021-05-06 02:38:13,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:38:13,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059947665] [2021-05-06 02:38:13,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:38:13,694 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:38:13,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [124722929] [2021-05-06 02:38:13,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:38:13,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:38:13,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 02:38:13,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:38:13,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:13,901 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-06 02:38:13,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:38:13,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059947665] [2021-05-06 02:38:13,902 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:38:13,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124722929] [2021-05-06 02:38:13,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124722929] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:38:13,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:38:13,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 02:38:13,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142554435] [2021-05-06 02:38:13,904 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 02:38:13,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:38:13,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 02:38:13,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:38:13,905 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-06 02:38:14,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:38:14,027 INFO L93 Difference]: Finished difference Result 54 states and 69 transitions. [2021-05-06 02:38:14,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 02:38:14,033 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), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 34 [2021-05-06 02:38:14,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:38:14,034 INFO L225 Difference]: With dead ends: 54 [2021-05-06 02:38:14,034 INFO L226 Difference]: Without dead ends: 47 [2021-05-06 02:38:14,035 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 30.6ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:38:14,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-06 02:38:14,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 37. [2021-05-06 02:38:14,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 02:38:14,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2021-05-06 02:38:14,057 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 34 [2021-05-06 02:38:14,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:38:14,058 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2021-05-06 02:38:14,058 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), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-06 02:38:14,058 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2021-05-06 02:38:14,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-06 02:38:14,059 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:38:14,059 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, 1] [2021-05-06 02:38:14,281 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 02:38:14,281 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:38:14,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:38:14,282 INFO L82 PathProgramCache]: Analyzing trace with hash 1443363578, now seen corresponding path program 1 times [2021-05-06 02:38:14,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:38:14,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134126300] [2021-05-06 02:38:14,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:38:14,295 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:38:14,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1649041213] [2021-05-06 02:38:14,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:38:14,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:38:14,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 02:38:14,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:38:14,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:14,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:14,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:14,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:14,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:14,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:14,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:14,632 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 02:38:14,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:38:14,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134126300] [2021-05-06 02:38:14,632 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:38:14,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649041213] [2021-05-06 02:38:14,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649041213] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:38:14,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:38:14,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 02:38:14,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463007880] [2021-05-06 02:38:14,634 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 02:38:14,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:38:14,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 02:38:14,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:38:14,635 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 9 states, 8 states have (on average 2.375) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 02:38:14,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:38:14,779 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2021-05-06 02:38:14,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 02:38:14,780 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 6 states have internal predecessors, (19), 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 37 [2021-05-06 02:38:14,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:38:14,782 INFO L225 Difference]: With dead ends: 53 [2021-05-06 02:38:14,782 INFO L226 Difference]: Without dead ends: 51 [2021-05-06 02:38:14,782 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 77.2ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:38:14,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-05-06 02:38:14,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2021-05-06 02:38:14,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 30 states have (on average 1.2) internal successors, (36), 31 states have internal predecessors, (36), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 02:38:14,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2021-05-06 02:38:14,795 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 37 [2021-05-06 02:38:14,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:38:14,795 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2021-05-06 02:38:14,795 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 02:38:14,796 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2021-05-06 02:38:14,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-06 02:38:14,796 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:38:14,797 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:38:15,019 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:38:15,019 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:38:15,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:38:15,020 INFO L82 PathProgramCache]: Analyzing trace with hash 584996456, now seen corresponding path program 1 times [2021-05-06 02:38:15,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:38:15,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402720888] [2021-05-06 02:38:15,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:38:15,043 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:38:15,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1511372787] [2021-05-06 02:38:15,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:38:15,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:38:15,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 02:38:15,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:38:15,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:15,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:15,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:15,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:15,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:15,230 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-06 02:38:15,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:38:15,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402720888] [2021-05-06 02:38:15,231 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:38:15,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511372787] [2021-05-06 02:38:15,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511372787] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:38:15,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:38:15,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 02:38:15,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533080290] [2021-05-06 02:38:15,232 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:38:15,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:38:15,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:38:15,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:38:15,234 INFO L87 Difference]: Start difference. First operand 50 states and 64 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 02:38:15,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:38:15,477 INFO L93 Difference]: Finished difference Result 103 states and 143 transitions. [2021-05-06 02:38:15,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 02:38:15,477 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (7), 2 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 39 [2021-05-06 02:38:15,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:38:15,482 INFO L225 Difference]: With dead ends: 103 [2021-05-06 02:38:15,482 INFO L226 Difference]: Without dead ends: 96 [2021-05-06 02:38:15,483 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 83.9ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:38:15,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-05-06 02:38:15,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2021-05-06 02:38:15,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 47 states have (on average 1.2553191489361701) internal successors, (59), 48 states have internal predecessors, (59), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 02:38:15,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 95 transitions. [2021-05-06 02:38:15,512 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 95 transitions. Word has length 39 [2021-05-06 02:38:15,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:38:15,513 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 95 transitions. [2021-05-06 02:38:15,513 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 02:38:15,513 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 95 transitions. [2021-05-06 02:38:15,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-06 02:38:15,515 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:38:15,516 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, 1] [2021-05-06 02:38:15,728 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:38:15,729 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:38:15,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:38:15,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1286298951, now seen corresponding path program 1 times [2021-05-06 02:38:15,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:38:15,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967396263] [2021-05-06 02:38:15,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:38:15,744 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:38:15,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [369809455] [2021-05-06 02:38:15,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:38:15,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:38:15,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-06 02:38:15,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:38:15,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:15,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:15,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:15,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:15,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:15,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:15,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:16,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:16,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:16,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:16,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:16,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:16,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:16,102 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 02:38:16,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:38:16,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967396263] [2021-05-06 02:38:16,102 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:38:16,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369809455] [2021-05-06 02:38:16,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369809455] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:38:16,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:38:16,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 02:38:16,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798455764] [2021-05-06 02:38:16,103 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 02:38:16,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:38:16,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 02:38:16,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:38:16,104 INFO L87 Difference]: Start difference. First operand 71 states and 95 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 02:38:16,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:38:16,397 INFO L93 Difference]: Finished difference Result 86 states and 114 transitions. [2021-05-06 02:38:16,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 02:38:16,398 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 42 [2021-05-06 02:38:16,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:38:16,399 INFO L225 Difference]: With dead ends: 86 [2021-05-06 02:38:16,400 INFO L226 Difference]: Without dead ends: 84 [2021-05-06 02:38:16,400 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 194.9ms TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-05-06 02:38:16,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-05-06 02:38:16,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 75. [2021-05-06 02:38:16,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 50 states have (on average 1.24) internal successors, (62), 51 states have internal predecessors, (62), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 02:38:16,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 98 transitions. [2021-05-06 02:38:16,413 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 98 transitions. Word has length 42 [2021-05-06 02:38:16,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:38:16,414 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 98 transitions. [2021-05-06 02:38:16,414 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 02:38:16,414 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 98 transitions. [2021-05-06 02:38:16,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-06 02:38:16,415 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:38:16,415 INFO L523 BasicCegarLoop]: trace histogram [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] [2021-05-06 02:38:16,636 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:38:16,637 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:38:16,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:38:16,637 INFO L82 PathProgramCache]: Analyzing trace with hash -974923140, now seen corresponding path program 1 times [2021-05-06 02:38:16,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:38:16,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73198631] [2021-05-06 02:38:16,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:38:16,649 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:38:16,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [45554120] [2021-05-06 02:38:16,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:38:16,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:38:16,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-06 02:38:16,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:38:16,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:16,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:16,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:16,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:16,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:16,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:16,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:16,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:16,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:16,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:16,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:16,975 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 02:38:16,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:38:16,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73198631] [2021-05-06 02:38:16,978 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:38:16,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45554120] [2021-05-06 02:38:16,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45554120] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:38:16,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:38:16,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 02:38:16,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868594745] [2021-05-06 02:38:16,979 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 02:38:16,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:38:16,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 02:38:16,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-06 02:38:16,980 INFO L87 Difference]: Start difference. First operand 75 states and 98 transitions. Second operand has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 02:38:17,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:38:17,269 INFO L93 Difference]: Finished difference Result 105 states and 139 transitions. [2021-05-06 02:38:17,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 02:38:17,270 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 42 [2021-05-06 02:38:17,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:38:17,271 INFO L225 Difference]: With dead ends: 105 [2021-05-06 02:38:17,271 INFO L226 Difference]: Without dead ends: 103 [2021-05-06 02:38:17,272 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 184.4ms TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-05-06 02:38:17,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-05-06 02:38:17,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 93. [2021-05-06 02:38:17,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 63 states have (on average 1.2380952380952381) internal successors, (78), 64 states have internal predecessors, (78), 23 states have call successors, (23), 7 states have call predecessors, (23), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 02:38:17,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 122 transitions. [2021-05-06 02:38:17,287 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 122 transitions. Word has length 42 [2021-05-06 02:38:17,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:38:17,287 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 122 transitions. [2021-05-06 02:38:17,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 02:38:17,287 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 122 transitions. [2021-05-06 02:38:17,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-06 02:38:17,288 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:38:17,288 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, 1] [2021-05-06 02:38:17,513 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-06 02:38:17,513 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:38:17,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:38:17,513 INFO L82 PathProgramCache]: Analyzing trace with hash 81990170, now seen corresponding path program 1 times [2021-05-06 02:38:17,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:38:17,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706021996] [2021-05-06 02:38:17,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:38:17,532 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:38:17,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [499995307] [2021-05-06 02:38:17,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:38:17,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:38:17,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 02:38:17,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:38:17,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:17,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:17,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:17,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:17,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:17,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:17,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:17,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:17,727 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-05-06 02:38:17,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:38:17,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706021996] [2021-05-06 02:38:17,727 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:38:17,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499995307] [2021-05-06 02:38:17,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499995307] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:38:17,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:38:17,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-06 02:38:17,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573573853] [2021-05-06 02:38:17,728 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 02:38:17,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:38:17,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 02:38:17,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:38:17,729 INFO L87 Difference]: Start difference. First operand 93 states and 122 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 02:38:17,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:38:17,879 INFO L93 Difference]: Finished difference Result 107 states and 140 transitions. [2021-05-06 02:38:17,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 02:38:17,880 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2021-05-06 02:38:17,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:38:17,881 INFO L225 Difference]: With dead ends: 107 [2021-05-06 02:38:17,881 INFO L226 Difference]: Without dead ends: 105 [2021-05-06 02:38:17,882 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 64.7ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:38:17,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-05-06 02:38:17,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 103. [2021-05-06 02:38:17,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 68 states have (on average 1.2352941176470589) internal successors, (84), 69 states have internal predecessors, (84), 27 states have call successors, (27), 8 states have call predecessors, (27), 7 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-06 02:38:17,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 136 transitions. [2021-05-06 02:38:17,896 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 136 transitions. Word has length 47 [2021-05-06 02:38:17,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:38:17,897 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 136 transitions. [2021-05-06 02:38:17,897 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 02:38:17,897 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 136 transitions. [2021-05-06 02:38:17,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-06 02:38:17,898 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:38:17,898 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-05-06 02:38:18,122 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:38:18,123 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:38:18,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:38:18,124 INFO L82 PathProgramCache]: Analyzing trace with hash 1524769911, now seen corresponding path program 1 times [2021-05-06 02:38:18,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:38:18,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34540346] [2021-05-06 02:38:18,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:38:18,134 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:38:18,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [724896897] [2021-05-06 02:38:18,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:38:18,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:38:18,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-06 02:38:18,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:38:18,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:18,366 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 02:38:18,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:38:18,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34540346] [2021-05-06 02:38:18,366 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:38:18,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724896897] [2021-05-06 02:38:18,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724896897] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:38:18,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:38:18,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 02:38:18,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824838679] [2021-05-06 02:38:18,370 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 02:38:18,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:38:18,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 02:38:18,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:38:18,371 INFO L87 Difference]: Start difference. First operand 103 states and 136 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-06 02:38:18,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:38:18,508 INFO L93 Difference]: Finished difference Result 113 states and 145 transitions. [2021-05-06 02:38:18,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 02:38:18,508 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 47 [2021-05-06 02:38:18,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:38:18,511 INFO L225 Difference]: With dead ends: 113 [2021-05-06 02:38:18,511 INFO L226 Difference]: Without dead ends: 111 [2021-05-06 02:38:18,511 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 57.5ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:38:18,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-05-06 02:38:18,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 107. [2021-05-06 02:38:18,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 71 states have (on average 1.2253521126760563) internal successors, (87), 72 states have internal predecessors, (87), 27 states have call successors, (27), 9 states have call predecessors, (27), 8 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-06 02:38:18,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 139 transitions. [2021-05-06 02:38:18,529 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 139 transitions. Word has length 47 [2021-05-06 02:38:18,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:38:18,529 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 139 transitions. [2021-05-06 02:38:18,530 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-06 02:38:18,530 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 139 transitions. [2021-05-06 02:38:18,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-06 02:38:18,531 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:38:18,531 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:38:18,744 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:38:18,745 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:38:18,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:38:18,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1836145722, now seen corresponding path program 2 times [2021-05-06 02:38:18,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:38:18,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762370109] [2021-05-06 02:38:18,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:38:18,771 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:38:18,771 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [711187770] [2021-05-06 02:38:18,772 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:38:18,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:38:18,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:38:18,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 02:38:18,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:38:18,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:18,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:18,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:18,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:18,911 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 02:38:18,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:38:18,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762370109] [2021-05-06 02:38:18,912 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:38:18,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711187770] [2021-05-06 02:38:18,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711187770] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:38:18,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:38:18,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 02:38:18,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080754977] [2021-05-06 02:38:18,913 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 02:38:18,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:38:18,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 02:38:18,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:38:18,914 INFO L87 Difference]: Start difference. First operand 107 states and 139 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-06 02:38:18,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:38:18,988 INFO L93 Difference]: Finished difference Result 148 states and 199 transitions. [2021-05-06 02:38:18,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 02:38:18,988 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 47 [2021-05-06 02:38:18,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:38:18,989 INFO L225 Difference]: With dead ends: 148 [2021-05-06 02:38:18,990 INFO L226 Difference]: Without dead ends: 110 [2021-05-06 02:38:18,990 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 19.6ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:38:18,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-05-06 02:38:19,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 90. [2021-05-06 02:38:19,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 58 states have (on average 1.1724137931034482) internal successors, (68), 59 states have internal predecessors, (68), 23 states have call successors, (23), 9 states have call predecessors, (23), 8 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 02:38:19,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 112 transitions. [2021-05-06 02:38:19,002 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 112 transitions. Word has length 47 [2021-05-06 02:38:19,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:38:19,002 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 112 transitions. [2021-05-06 02:38:19,002 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-06 02:38:19,002 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 112 transitions. [2021-05-06 02:38:19,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-06 02:38:19,003 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:38:19,003 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, 1] [2021-05-06 02:38:19,224 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-06 02:38:19,225 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:38:19,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:38:19,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1952108775, now seen corresponding path program 1 times [2021-05-06 02:38:19,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:38:19,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713638970] [2021-05-06 02:38:19,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:38:19,238 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:38:19,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1426277318] [2021-05-06 02:38:19,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:38:19,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:38:19,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 02:38:19,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:38:19,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:19,420 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-05-06 02:38:19,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:38:19,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713638970] [2021-05-06 02:38:19,420 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:38:19,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426277318] [2021-05-06 02:38:19,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426277318] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:38:19,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:38:19,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 02:38:19,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624784065] [2021-05-06 02:38:19,421 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 02:38:19,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:38:19,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 02:38:19,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:38:19,422 INFO L87 Difference]: Start difference. First operand 90 states and 112 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-05-06 02:38:19,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:38:19,478 INFO L93 Difference]: Finished difference Result 130 states and 174 transitions. [2021-05-06 02:38:19,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 02:38:19,478 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 52 [2021-05-06 02:38:19,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:38:19,479 INFO L225 Difference]: With dead ends: 130 [2021-05-06 02:38:19,480 INFO L226 Difference]: Without dead ends: 128 [2021-05-06 02:38:19,480 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.2ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:38:19,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-05-06 02:38:19,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 114. [2021-05-06 02:38:19,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 65 states have (on average 1.1538461538461537) internal successors, (75), 70 states have internal predecessors, (75), 39 states have call successors, (39), 10 states have call predecessors, (39), 9 states have return successors, (37), 33 states have call predecessors, (37), 37 states have call successors, (37) [2021-05-06 02:38:19,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 151 transitions. [2021-05-06 02:38:19,498 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 151 transitions. Word has length 52 [2021-05-06 02:38:19,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:38:19,498 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 151 transitions. [2021-05-06 02:38:19,498 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-05-06 02:38:19,498 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 151 transitions. [2021-05-06 02:38:19,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-06 02:38:19,499 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:38:19,499 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:38:19,723 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:38:19,723 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:38:19,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:38:19,724 INFO L82 PathProgramCache]: Analyzing trace with hash 1926690588, now seen corresponding path program 1 times [2021-05-06 02:38:19,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:38:19,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17297483] [2021-05-06 02:38:19,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:38:19,733 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:38:19,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [930214825] [2021-05-06 02:38:19,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:38:19,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:38:19,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 02:38:19,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:38:19,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:19,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:19,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:19,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:19,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:19,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:19,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:19,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:19,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:19,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:19,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:19,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:19,945 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-05-06 02:38:19,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:38:19,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17297483] [2021-05-06 02:38:19,945 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:38:19,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930214825] [2021-05-06 02:38:19,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930214825] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:38:19,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:38:19,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 02:38:19,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380406326] [2021-05-06 02:38:19,946 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 02:38:19,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:38:19,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 02:38:19,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:38:19,947 INFO L87 Difference]: Start difference. First operand 114 states and 151 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 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) [2021-05-06 02:38:20,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:38:20,194 INFO L93 Difference]: Finished difference Result 166 states and 231 transitions. [2021-05-06 02:38:20,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 02:38:20,195 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 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 52 [2021-05-06 02:38:20,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:38:20,197 INFO L225 Difference]: With dead ends: 166 [2021-05-06 02:38:20,197 INFO L226 Difference]: Without dead ends: 164 [2021-05-06 02:38:20,198 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 121.0ms TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-05-06 02:38:20,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-05-06 02:38:20,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 92. [2021-05-06 02:38:20,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 53 states have (on average 1.150943396226415) internal successors, (61), 57 states have internal predecessors, (61), 31 states have call successors, (31), 8 states have call predecessors, (31), 7 states have return successors, (29), 26 states have call predecessors, (29), 29 states have call successors, (29) [2021-05-06 02:38:20,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 121 transitions. [2021-05-06 02:38:20,214 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 121 transitions. Word has length 52 [2021-05-06 02:38:20,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:38:20,214 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 121 transitions. [2021-05-06 02:38:20,215 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 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) [2021-05-06 02:38:20,215 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 121 transitions. [2021-05-06 02:38:20,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-06 02:38:20,215 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:38:20,215 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, 1, 1] [2021-05-06 02:38:20,428 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:38:20,429 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:38:20,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:38:20,429 INFO L82 PathProgramCache]: Analyzing trace with hash 188363668, now seen corresponding path program 1 times [2021-05-06 02:38:20,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:38:20,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548137109] [2021-05-06 02:38:20,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:38:20,440 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:38:20,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1035778931] [2021-05-06 02:38:20,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:38:20,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:38:20,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 62 conjunts are in the unsatisfiable core [2021-05-06 02:38:20,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:38:20,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:20,826 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-05-06 02:38:20,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:38:20,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548137109] [2021-05-06 02:38:20,827 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:38:20,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035778931] [2021-05-06 02:38:20,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035778931] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:38:20,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:38:20,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 02:38:20,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543218019] [2021-05-06 02:38:20,827 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 02:38:20,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:38:20,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 02:38:20,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:38:20,828 INFO L87 Difference]: Start difference. First operand 92 states and 121 transitions. Second operand has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 02:38:21,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:38:21,248 INFO L93 Difference]: Finished difference Result 178 states and 243 transitions. [2021-05-06 02:38:21,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 02:38:21,249 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 4 states have call successors, (11), 2 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 64 [2021-05-06 02:38:21,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:38:21,253 INFO L225 Difference]: With dead ends: 178 [2021-05-06 02:38:21,253 INFO L226 Difference]: Without dead ends: 175 [2021-05-06 02:38:21,256 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 233.7ms TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-05-06 02:38:21,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-05-06 02:38:21,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 171. [2021-05-06 02:38:21,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 95 states have (on average 1.168421052631579) internal successors, (111), 102 states have internal predecessors, (111), 63 states have call successors, (63), 13 states have call predecessors, (63), 12 states have return successors, (61), 55 states have call predecessors, (61), 61 states have call successors, (61) [2021-05-06 02:38:21,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 235 transitions. [2021-05-06 02:38:21,294 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 235 transitions. Word has length 64 [2021-05-06 02:38:21,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:38:21,294 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 235 transitions. [2021-05-06 02:38:21,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 02:38:21,294 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 235 transitions. [2021-05-06 02:38:21,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-06 02:38:21,295 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:38:21,295 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:38:21,518 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-06 02:38:21,518 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:38:21,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:38:21,519 INFO L82 PathProgramCache]: Analyzing trace with hash -368004398, now seen corresponding path program 2 times [2021-05-06 02:38:21,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:38:21,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696178499] [2021-05-06 02:38:21,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:38:21,527 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:38:21,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [821720371] [2021-05-06 02:38:21,527 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:38:21,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:38:21,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:38:21,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-06 02:38:21,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:38:21,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:21,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:21,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:21,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:21,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:21,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:21,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:21,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:21,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:21,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:21,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:21,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:21,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:21,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:21,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:21,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:21,751 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-05-06 02:38:21,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:38:21,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696178499] [2021-05-06 02:38:21,751 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:38:21,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821720371] [2021-05-06 02:38:21,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821720371] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:38:21,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:38:21,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 02:38:21,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056142600] [2021-05-06 02:38:21,752 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:38:21,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:38:21,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:38:21,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:38:21,753 INFO L87 Difference]: Start difference. First operand 171 states and 235 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-06 02:38:22,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:38:22,075 INFO L93 Difference]: Finished difference Result 288 states and 424 transitions. [2021-05-06 02:38:22,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 02:38:22,076 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 69 [2021-05-06 02:38:22,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:38:22,080 INFO L225 Difference]: With dead ends: 288 [2021-05-06 02:38:22,080 INFO L226 Difference]: Without dead ends: 281 [2021-05-06 02:38:22,081 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 141.1ms TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2021-05-06 02:38:22,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-05-06 02:38:22,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 196. [2021-05-06 02:38:22,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 112 states have (on average 1.1964285714285714) internal successors, (134), 118 states have internal predecessors, (134), 71 states have call successors, (71), 13 states have call predecessors, (71), 12 states have return successors, (69), 64 states have call predecessors, (69), 69 states have call successors, (69) [2021-05-06 02:38:22,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 274 transitions. [2021-05-06 02:38:22,122 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 274 transitions. Word has length 69 [2021-05-06 02:38:22,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:38:22,122 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 274 transitions. [2021-05-06 02:38:22,122 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-06 02:38:22,123 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 274 transitions. [2021-05-06 02:38:22,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-06 02:38:22,123 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:38:22,124 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:38:22,347 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-06 02:38:22,347 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:38:22,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:38:22,347 INFO L82 PathProgramCache]: Analyzing trace with hash -298771846, now seen corresponding path program 1 times [2021-05-06 02:38:22,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:38:22,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131990824] [2021-05-06 02:38:22,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:38:22,355 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:38:22,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [358597698] [2021-05-06 02:38:22,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:38:22,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:38:22,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-06 02:38:22,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:38:22,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:22,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:22,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:22,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:22,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:22,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:22,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:22,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:22,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:22,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:22,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:22,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:22,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:22,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:22,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:22,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:22,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:22,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:22,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:22,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:22,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:22,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:22,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:22,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:22,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:22,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:22,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:22,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:22,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:22,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:22,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:22,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:22,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:22,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:22,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:22,682 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 20 proven. 11 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-05-06 02:38:22,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:38:22,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131990824] [2021-05-06 02:38:22,682 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:38:22,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358597698] [2021-05-06 02:38:22,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358597698] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:38:22,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:38:22,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 02:38:22,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047751463] [2021-05-06 02:38:22,683 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 02:38:22,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:38:22,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 02:38:22,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-05-06 02:38:22,684 INFO L87 Difference]: Start difference. First operand 196 states and 274 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 02:38:23,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:38:23,043 INFO L93 Difference]: Finished difference Result 247 states and 351 transitions. [2021-05-06 02:38:23,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 02:38:23,044 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) Word has length 74 [2021-05-06 02:38:23,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:38:23,045 INFO L225 Difference]: With dead ends: 247 [2021-05-06 02:38:23,046 INFO L226 Difference]: Without dead ends: 245 [2021-05-06 02:38:23,047 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 155.0ms TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-05-06 02:38:23,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-05-06 02:38:23,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 232. [2021-05-06 02:38:23,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 130 states have (on average 1.2153846153846153) internal successors, (158), 135 states have internal predecessors, (158), 87 states have call successors, (87), 15 states have call predecessors, (87), 14 states have return successors, (85), 81 states have call predecessors, (85), 85 states have call successors, (85) [2021-05-06 02:38:23,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 330 transitions. [2021-05-06 02:38:23,088 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 330 transitions. Word has length 74 [2021-05-06 02:38:23,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:38:23,089 INFO L480 AbstractCegarLoop]: Abstraction has 232 states and 330 transitions. [2021-05-06 02:38:23,089 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 02:38:23,089 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 330 transitions. [2021-05-06 02:38:23,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-05-06 02:38:23,091 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:38:23,092 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:38:23,316 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-06 02:38:23,317 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:38:23,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:38:23,317 INFO L82 PathProgramCache]: Analyzing trace with hash -2089538094, now seen corresponding path program 1 times [2021-05-06 02:38:23,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:38:23,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016551689] [2021-05-06 02:38:23,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:38:23,325 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:38:23,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1933708140] [2021-05-06 02:38:23,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:38:23,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:38:23,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 02:38:23,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:38:23,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:23,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:23,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:23,520 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-05-06 02:38:23,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:38:23,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016551689] [2021-05-06 02:38:23,520 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:38:23,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933708140] [2021-05-06 02:38:23,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933708140] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:38:23,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:38:23,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 02:38:23,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985923200] [2021-05-06 02:38:23,521 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:38:23,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:38:23,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:38:23,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:38:23,522 INFO L87 Difference]: Start difference. First operand 232 states and 330 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 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) [2021-05-06 02:38:23,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:38:23,694 INFO L93 Difference]: Finished difference Result 246 states and 341 transitions. [2021-05-06 02:38:23,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 02:38:23,695 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), 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 72 [2021-05-06 02:38:23,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:38:23,696 INFO L225 Difference]: With dead ends: 246 [2021-05-06 02:38:23,696 INFO L226 Difference]: Without dead ends: 244 [2021-05-06 02:38:23,697 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 51.1ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:38:23,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-05-06 02:38:23,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 244. [2021-05-06 02:38:23,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 139 states have (on average 1.2014388489208634) internal successors, (167), 144 states have internal predecessors, (167), 87 states have call successors, (87), 18 states have call predecessors, (87), 17 states have return successors, (85), 81 states have call predecessors, (85), 85 states have call successors, (85) [2021-05-06 02:38:23,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 339 transitions. [2021-05-06 02:38:23,755 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 339 transitions. Word has length 72 [2021-05-06 02:38:23,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:38:23,755 INFO L480 AbstractCegarLoop]: Abstraction has 244 states and 339 transitions. [2021-05-06 02:38:23,755 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), 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) [2021-05-06 02:38:23,755 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 339 transitions. [2021-05-06 02:38:23,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-05-06 02:38:23,756 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:38:23,756 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:38:23,981 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:38:23,982 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:38:23,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:38:23,982 INFO L82 PathProgramCache]: Analyzing trace with hash 1984914564, now seen corresponding path program 2 times [2021-05-06 02:38:23,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:38:23,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012920897] [2021-05-06 02:38:23,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:38:23,989 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:38:23,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1068709563] [2021-05-06 02:38:23,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:38:24,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:38:24,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:38:24,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-06 02:38:24,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:38:24,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:24,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:24,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:24,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:24,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:24,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:24,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:24,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:24,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:24,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:24,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:24,216 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-06 02:38:24,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:38:24,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012920897] [2021-05-06 02:38:24,216 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:38:24,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068709563] [2021-05-06 02:38:24,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068709563] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:38:24,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:38:24,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 02:38:24,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820688321] [2021-05-06 02:38:24,217 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 02:38:24,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:38:24,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 02:38:24,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:38:24,218 INFO L87 Difference]: Start difference. First operand 244 states and 339 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-06 02:38:24,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:38:24,298 INFO L93 Difference]: Finished difference Result 399 states and 550 transitions. [2021-05-06 02:38:24,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 02:38:24,298 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 77 [2021-05-06 02:38:24,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:38:24,300 INFO L225 Difference]: With dead ends: 399 [2021-05-06 02:38:24,300 INFO L226 Difference]: Without dead ends: 246 [2021-05-06 02:38:24,302 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 17.6ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:38:24,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-05-06 02:38:24,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 227. [2021-05-06 02:38:24,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 134 states have (on average 1.1865671641791045) internal successors, (159), 135 states have internal predecessors, (159), 75 states have call successors, (75), 18 states have call predecessors, (75), 17 states have return successors, (73), 73 states have call predecessors, (73), 73 states have call successors, (73) [2021-05-06 02:38:24,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 307 transitions. [2021-05-06 02:38:24,340 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 307 transitions. Word has length 77 [2021-05-06 02:38:24,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:38:24,340 INFO L480 AbstractCegarLoop]: Abstraction has 227 states and 307 transitions. [2021-05-06 02:38:24,340 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-06 02:38:24,340 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 307 transitions. [2021-05-06 02:38:24,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-05-06 02:38:24,341 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:38:24,341 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:38:24,564 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-06 02:38:24,564 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:38:24,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:38:24,564 INFO L82 PathProgramCache]: Analyzing trace with hash 2139677040, now seen corresponding path program 3 times [2021-05-06 02:38:24,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:38:24,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537199939] [2021-05-06 02:38:24,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:38:24,572 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:38:24,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [941706706] [2021-05-06 02:38:24,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:38:24,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-06 02:38:24,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:38:24,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-06 02:38:24,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:38:24,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:24,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:24,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:24,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:24,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:24,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:24,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:24,748 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-05-06 02:38:24,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:38:24,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537199939] [2021-05-06 02:38:24,749 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:38:24,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941706706] [2021-05-06 02:38:24,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941706706] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:38:24,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:38:24,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 02:38:24,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978534527] [2021-05-06 02:38:24,749 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 02:38:24,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:38:24,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 02:38:24,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:38:24,750 INFO L87 Difference]: Start difference. First operand 227 states and 307 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-05-06 02:38:24,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:38:24,824 INFO L93 Difference]: Finished difference Result 250 states and 339 transitions. [2021-05-06 02:38:24,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 02:38:24,824 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 77 [2021-05-06 02:38:24,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:38:24,826 INFO L225 Difference]: With dead ends: 250 [2021-05-06 02:38:24,826 INFO L226 Difference]: Without dead ends: 248 [2021-05-06 02:38:24,826 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.2ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:38:24,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-05-06 02:38:24,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 243. [2021-05-06 02:38:24,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 141 states have (on average 1.1914893617021276) internal successors, (168), 142 states have internal predecessors, (168), 83 states have call successors, (83), 19 states have call predecessors, (83), 18 states have return successors, (81), 81 states have call predecessors, (81), 81 states have call successors, (81) [2021-05-06 02:38:24,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 332 transitions. [2021-05-06 02:38:24,882 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 332 transitions. Word has length 77 [2021-05-06 02:38:24,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:38:24,882 INFO L480 AbstractCegarLoop]: Abstraction has 243 states and 332 transitions. [2021-05-06 02:38:24,883 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-05-06 02:38:24,883 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 332 transitions. [2021-05-06 02:38:24,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-05-06 02:38:24,883 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:38:24,884 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:38:25,101 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-06 02:38:25,101 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:38:25,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:38:25,101 INFO L82 PathProgramCache]: Analyzing trace with hash -867272991, now seen corresponding path program 4 times [2021-05-06 02:38:25,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:38:25,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830813817] [2021-05-06 02:38:25,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:38:25,112 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:38:25,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [441518804] [2021-05-06 02:38:25,112 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:38:25,194 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 02:38:25,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:38:25,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 77 conjunts are in the unsatisfiable core [2021-05-06 02:38:25,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:38:25,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:25,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:25,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:25,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:25,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:25,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:25,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:25,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:25,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:25,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:25,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:25,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:25,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:25,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:25,710 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 12 proven. 32 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-06 02:38:25,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:38:25,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830813817] [2021-05-06 02:38:25,711 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:38:25,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441518804] [2021-05-06 02:38:25,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441518804] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:38:25,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:38:25,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-06 02:38:25,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739807657] [2021-05-06 02:38:25,713 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-06 02:38:25,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:38:25,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-06 02:38:25,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-05-06 02:38:25,714 INFO L87 Difference]: Start difference. First operand 243 states and 332 transitions. Second operand has 18 states, 16 states have (on average 2.3125) internal successors, (37), 14 states have internal predecessors, (37), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2021-05-06 02:38:26,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:38:26,464 INFO L93 Difference]: Finished difference Result 311 states and 418 transitions. [2021-05-06 02:38:26,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 02:38:26,464 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.3125) internal successors, (37), 14 states have internal predecessors, (37), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) Word has length 77 [2021-05-06 02:38:26,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:38:26,466 INFO L225 Difference]: With dead ends: 311 [2021-05-06 02:38:26,466 INFO L226 Difference]: Without dead ends: 309 [2021-05-06 02:38:26,467 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 493.3ms TimeCoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2021-05-06 02:38:26,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-05-06 02:38:26,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 247. [2021-05-06 02:38:26,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 144 states have (on average 1.1875) internal successors, (171), 145 states have internal predecessors, (171), 83 states have call successors, (83), 20 states have call predecessors, (83), 19 states have return successors, (81), 81 states have call predecessors, (81), 81 states have call successors, (81) [2021-05-06 02:38:26,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 335 transitions. [2021-05-06 02:38:26,515 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 335 transitions. Word has length 77 [2021-05-06 02:38:26,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:38:26,517 INFO L480 AbstractCegarLoop]: Abstraction has 247 states and 335 transitions. [2021-05-06 02:38:26,517 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 16 states have (on average 2.3125) internal successors, (37), 14 states have internal predecessors, (37), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2021-05-06 02:38:26,517 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 335 transitions. [2021-05-06 02:38:26,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-06 02:38:26,518 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:38:26,518 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 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] [2021-05-06 02:38:26,743 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-06 02:38:26,744 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:38:26,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:38:26,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1033380920, now seen corresponding path program 1 times [2021-05-06 02:38:26,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:38:26,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891821886] [2021-05-06 02:38:26,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:38:26,751 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:38:26,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1712364102] [2021-05-06 02:38:26,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:38:26,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:38:26,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-06 02:38:26,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:38:26,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:26,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:26,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:26,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:26,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:26,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:26,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:26,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:26,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:26,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:26,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:26,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:26,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:26,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:26,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:26,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:26,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:26,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:27,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:27,010 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-05-06 02:38:27,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:38:27,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891821886] [2021-05-06 02:38:27,010 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:38:27,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712364102] [2021-05-06 02:38:27,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712364102] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:38:27,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:38:27,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 02:38:27,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965883402] [2021-05-06 02:38:27,011 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 02:38:27,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:38:27,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 02:38:27,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-05-06 02:38:27,012 INFO L87 Difference]: Start difference. First operand 247 states and 335 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 10 states have internal predecessors, (29), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 02:38:27,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:38:27,437 INFO L93 Difference]: Finished difference Result 357 states and 497 transitions. [2021-05-06 02:38:27,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 02:38:27,437 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 10 states have internal predecessors, (29), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 79 [2021-05-06 02:38:27,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:38:27,440 INFO L225 Difference]: With dead ends: 357 [2021-05-06 02:38:27,440 INFO L226 Difference]: Without dead ends: 355 [2021-05-06 02:38:27,440 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 162.9ms TimeCoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-05-06 02:38:27,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2021-05-06 02:38:27,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 265. [2021-05-06 02:38:27,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 152 states have (on average 1.1776315789473684) internal successors, (179), 155 states have internal predecessors, (179), 91 states have call successors, (91), 22 states have call predecessors, (91), 21 states have return successors, (89), 87 states have call predecessors, (89), 89 states have call successors, (89) [2021-05-06 02:38:27,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 359 transitions. [2021-05-06 02:38:27,488 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 359 transitions. Word has length 79 [2021-05-06 02:38:27,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:38:27,489 INFO L480 AbstractCegarLoop]: Abstraction has 265 states and 359 transitions. [2021-05-06 02:38:27,489 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 10 states have internal predecessors, (29), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 02:38:27,489 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 359 transitions. [2021-05-06 02:38:27,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-05-06 02:38:27,490 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:38:27,490 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, 1, 1, 1] [2021-05-06 02:38:27,704 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:38:27,705 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:38:27,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:38:27,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1679616651, now seen corresponding path program 1 times [2021-05-06 02:38:27,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:38:27,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615043309] [2021-05-06 02:38:27,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:38:27,713 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:38:27,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [600058974] [2021-05-06 02:38:27,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:38:27,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:38:27,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 68 conjunts are in the unsatisfiable core [2021-05-06 02:38:27,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:38:27,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:27,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:27,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:27,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:27,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:27,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:27,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:27,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:27,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:27,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:27,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:27,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:27,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:27,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:28,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:28,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:28,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:28,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:28,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:28,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:28,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:28,221 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 53 proven. 18 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-05-06 02:38:28,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:38:28,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615043309] [2021-05-06 02:38:28,222 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:38:28,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600058974] [2021-05-06 02:38:28,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600058974] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:38:28,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:38:28,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-06 02:38:28,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118523235] [2021-05-06 02:38:28,222 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-06 02:38:28,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:38:28,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-06 02:38:28,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-05-06 02:38:28,223 INFO L87 Difference]: Start difference. First operand 265 states and 359 transitions. Second operand has 17 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 02:38:29,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:38:29,048 INFO L93 Difference]: Finished difference Result 353 states and 482 transitions. [2021-05-06 02:38:29,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-06 02:38:29,049 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 86 [2021-05-06 02:38:29,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:38:29,053 INFO L225 Difference]: With dead ends: 353 [2021-05-06 02:38:29,053 INFO L226 Difference]: Without dead ends: 350 [2021-05-06 02:38:29,053 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 466.7ms TimeCoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2021-05-06 02:38:29,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-05-06 02:38:29,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 330. [2021-05-06 02:38:29,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 186 states have (on average 1.1935483870967742) internal successors, (222), 189 states have internal predecessors, (222), 119 states have call successors, (119), 25 states have call predecessors, (119), 24 states have return successors, (117), 115 states have call predecessors, (117), 117 states have call successors, (117) [2021-05-06 02:38:29,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 458 transitions. [2021-05-06 02:38:29,115 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 458 transitions. Word has length 86 [2021-05-06 02:38:29,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:38:29,115 INFO L480 AbstractCegarLoop]: Abstraction has 330 states and 458 transitions. [2021-05-06 02:38:29,115 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 02:38:29,115 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 458 transitions. [2021-05-06 02:38:29,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-05-06 02:38:29,117 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:38:29,117 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, 1, 1] [2021-05-06 02:38:29,332 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:38:29,333 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:38:29,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:38:29,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1455197645, now seen corresponding path program 2 times [2021-05-06 02:38:29,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:38:29,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056145666] [2021-05-06 02:38:29,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:38:29,342 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:38:29,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1818768881] [2021-05-06 02:38:29,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:38:29,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:38:29,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:38:29,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 85 conjunts are in the unsatisfiable core [2021-05-06 02:38:29,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:38:29,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:29,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:29,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:29,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:29,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:29,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:29,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:29,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:29,856 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 51 proven. 32 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-05-06 02:38:29,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:38:29,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056145666] [2021-05-06 02:38:29,856 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:38:29,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818768881] [2021-05-06 02:38:29,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818768881] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:38:29,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:38:29,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-06 02:38:29,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063990593] [2021-05-06 02:38:29,857 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-06 02:38:29,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:38:29,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-06 02:38:29,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-05-06 02:38:29,859 INFO L87 Difference]: Start difference. First operand 330 states and 458 transitions. Second operand has 17 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 02:38:30,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:38:30,644 INFO L93 Difference]: Finished difference Result 426 states and 588 transitions. [2021-05-06 02:38:30,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 02:38:30,645 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) Word has length 91 [2021-05-06 02:38:30,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:38:30,647 INFO L225 Difference]: With dead ends: 426 [2021-05-06 02:38:30,647 INFO L226 Difference]: Without dead ends: 423 [2021-05-06 02:38:30,648 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 357.2ms TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-05-06 02:38:30,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-05-06 02:38:30,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 399. [2021-05-06 02:38:30,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 223 states have (on average 1.201793721973094) internal successors, (268), 226 states have internal predecessors, (268), 147 states have call successors, (147), 29 states have call predecessors, (147), 28 states have return successors, (145), 143 states have call predecessors, (145), 145 states have call successors, (145) [2021-05-06 02:38:30,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 560 transitions. [2021-05-06 02:38:30,728 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 560 transitions. Word has length 91 [2021-05-06 02:38:30,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:38:30,728 INFO L480 AbstractCegarLoop]: Abstraction has 399 states and 560 transitions. [2021-05-06 02:38:30,728 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 02:38:30,728 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 560 transitions. [2021-05-06 02:38:30,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-05-06 02:38:30,729 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:38:30,729 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:38:30,952 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-06 02:38:30,952 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:38:30,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:38:30,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1426729189, now seen corresponding path program 2 times [2021-05-06 02:38:30,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:38:30,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925502558] [2021-05-06 02:38:30,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:38:30,959 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:38:30,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [996826678] [2021-05-06 02:38:30,959 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 [2021-05-06 02:38:31,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:38:31,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:38:31,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-06 02:38:31,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:38:31,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:31,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:31,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:31,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:31,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:31,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:31,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:31,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:31,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:31,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:31,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:31,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:31,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:31,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:31,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:31,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:31,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:31,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:31,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:31,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:31,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:31,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:31,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:31,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:31,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:31,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:31,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:31,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:31,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:31,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:31,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:31,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:31,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:31,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:31,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:31,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:31,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:31,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:31,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:31,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:31,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:31,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:31,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:31,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:31,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:31,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:31,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:31,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:31,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:31,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:31,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:31,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:31,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:31,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:31,314 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 22 proven. 28 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2021-05-06 02:38:31,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:38:31,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925502558] [2021-05-06 02:38:31,315 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:38:31,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996826678] [2021-05-06 02:38:31,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996826678] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:38:31,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:38:31,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 02:38:31,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917172006] [2021-05-06 02:38:31,316 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 02:38:31,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:38:31,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 02:38:31,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:38:31,317 INFO L87 Difference]: Start difference. First operand 399 states and 560 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-06 02:38:31,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:38:31,718 INFO L93 Difference]: Finished difference Result 529 states and 730 transitions. [2021-05-06 02:38:31,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 02:38:31,720 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 96 [2021-05-06 02:38:31,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:38:31,722 INFO L225 Difference]: With dead ends: 529 [2021-05-06 02:38:31,722 INFO L226 Difference]: Without dead ends: 426 [2021-05-06 02:38:31,723 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 205.1ms TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-05-06 02:38:31,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2021-05-06 02:38:31,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 409. [2021-05-06 02:38:31,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 229 states have (on average 1.1877729257641922) internal successors, (272), 234 states have internal predecessors, (272), 149 states have call successors, (149), 31 states have call predecessors, (149), 30 states have return successors, (147), 143 states have call predecessors, (147), 147 states have call successors, (147) [2021-05-06 02:38:31,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 568 transitions. [2021-05-06 02:38:31,795 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 568 transitions. Word has length 96 [2021-05-06 02:38:31,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:38:31,795 INFO L480 AbstractCegarLoop]: Abstraction has 409 states and 568 transitions. [2021-05-06 02:38:31,795 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-06 02:38:31,795 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 568 transitions. [2021-05-06 02:38:31,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-05-06 02:38:31,796 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:38:31,796 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:38:32,012 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-06 02:38:32,013 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:38:32,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:38:32,013 INFO L82 PathProgramCache]: Analyzing trace with hash 844095065, now seen corresponding path program 2 times [2021-05-06 02:38:32,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:38:32,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57282770] [2021-05-06 02:38:32,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:38:32,025 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:38:32,026 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [596973010] [2021-05-06 02:38:32,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:38:32,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:38:32,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:38:32,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-06 02:38:32,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:38:32,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:32,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:32,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:32,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:32,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:32,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:32,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:32,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:32,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:32,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:32,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:32,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:32,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:32,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:32,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:32,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:32,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:32,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:32,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:32,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:32,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:32,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:32,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:32,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:32,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:32,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:32,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:32,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:32,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:32,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:32,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:32,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:32,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:32,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:32,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:32,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:32,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:32,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:32,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:32,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:32,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:32,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:32,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:32,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:32,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:32,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:32,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:32,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:32,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:32,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:32,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:32,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:32,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:32,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:32,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:32,415 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 28 proven. 26 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2021-05-06 02:38:32,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:38:32,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57282770] [2021-05-06 02:38:32,415 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:38:32,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596973010] [2021-05-06 02:38:32,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596973010] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:38:32,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:38:32,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-06 02:38:32,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212333537] [2021-05-06 02:38:32,416 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 02:38:32,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:38:32,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 02:38:32,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2021-05-06 02:38:32,418 INFO L87 Difference]: Start difference. First operand 409 states and 568 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, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-06 02:38:32,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:38:32,996 INFO L93 Difference]: Finished difference Result 625 states and 867 transitions. [2021-05-06 02:38:32,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-06 02:38:32,997 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, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 101 [2021-05-06 02:38:32,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:38:32,999 INFO L225 Difference]: With dead ends: 625 [2021-05-06 02:38:32,999 INFO L226 Difference]: Without dead ends: 505 [2021-05-06 02:38:33,000 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 348.3ms TimeCoverageRelationStatistics Valid=139, Invalid=563, Unknown=0, NotChecked=0, Total=702 [2021-05-06 02:38:33,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2021-05-06 02:38:33,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 411. [2021-05-06 02:38:33,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 232 states have (on average 1.1810344827586208) internal successors, (274), 237 states have internal predecessors, (274), 147 states have call successors, (147), 32 states have call predecessors, (147), 31 states have return successors, (145), 141 states have call predecessors, (145), 145 states have call successors, (145) [2021-05-06 02:38:33,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 566 transitions. [2021-05-06 02:38:33,073 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 566 transitions. Word has length 101 [2021-05-06 02:38:33,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:38:33,074 INFO L480 AbstractCegarLoop]: Abstraction has 411 states and 566 transitions. [2021-05-06 02:38:33,074 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, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-06 02:38:33,074 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 566 transitions. [2021-05-06 02:38:33,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-06 02:38:33,075 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:38:33,075 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:38:33,296 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:38:33,297 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:38:33,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:38:33,297 INFO L82 PathProgramCache]: Analyzing trace with hash -100199667, now seen corresponding path program 5 times [2021-05-06 02:38:33,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:38:33,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370713358] [2021-05-06 02:38:33,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:38:33,304 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:38:33,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1851520478] [2021-05-06 02:38:33,304 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:38:33,441 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-06 02:38:33,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:38:33,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 67 conjunts are in the unsatisfiable core [2021-05-06 02:38:33,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:38:33,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:33,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:33,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:33,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:33,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:33,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:33,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:33,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:33,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:33,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:33,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:33,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:33,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:33,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:33,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:33,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:33,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:33,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:33,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:33,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:33,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:33,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:33,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:33,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:33,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:33,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:34,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:34,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:34,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:34,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:34,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:34,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:34,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:34,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:34,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:34,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:34,138 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 49 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-05-06 02:38:34,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:38:34,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370713358] [2021-05-06 02:38:34,139 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:38:34,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851520478] [2021-05-06 02:38:34,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851520478] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:38:34,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:38:34,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-05-06 02:38:34,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481164607] [2021-05-06 02:38:34,140 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-06 02:38:34,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:38:34,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-06 02:38:34,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-05-06 02:38:34,140 INFO L87 Difference]: Start difference. First operand 411 states and 566 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-06 02:38:35,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:38:35,187 INFO L93 Difference]: Finished difference Result 523 states and 716 transitions. [2021-05-06 02:38:35,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-06 02:38:35,201 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 102 [2021-05-06 02:38:35,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:38:35,204 INFO L225 Difference]: With dead ends: 523 [2021-05-06 02:38:35,204 INFO L226 Difference]: Without dead ends: 521 [2021-05-06 02:38:35,204 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 744.7ms TimeCoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2021-05-06 02:38:35,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-05-06 02:38:35,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 501. [2021-05-06 02:38:35,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 285 states have (on average 1.182456140350877) internal successors, (337), 290 states have internal predecessors, (337), 179 states have call successors, (179), 37 states have call predecessors, (179), 36 states have return successors, (177), 173 states have call predecessors, (177), 177 states have call successors, (177) [2021-05-06 02:38:35,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 693 transitions. [2021-05-06 02:38:35,295 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 693 transitions. Word has length 102 [2021-05-06 02:38:35,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:38:35,296 INFO L480 AbstractCegarLoop]: Abstraction has 501 states and 693 transitions. [2021-05-06 02:38:35,296 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-06 02:38:35,296 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 693 transitions. [2021-05-06 02:38:35,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-06 02:38:35,297 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:38:35,297 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, 1, 1, 1] [2021-05-06 02:38:35,511 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-06 02:38:35,511 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:38:35,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:38:35,511 INFO L82 PathProgramCache]: Analyzing trace with hash -543529628, now seen corresponding path program 1 times [2021-05-06 02:38:35,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:38:35,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181857214] [2021-05-06 02:38:35,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:38:35,519 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:38:35,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [835642596] [2021-05-06 02:38:35,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:38:35,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:38:35,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-06 02:38:35,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:38:35,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:35,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:35,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:35,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:35,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:35,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:35,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:35,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:35,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:35,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:35,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:35,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:35,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:35,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:35,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:35,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:35,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:35,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:35,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:35,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:35,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:35,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:35,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:35,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:35,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:35,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:35,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:35,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:35,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:35,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:35,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:35,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:35,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:35,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:35,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:35,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:35,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:35,931 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 26 proven. 29 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2021-05-06 02:38:35,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:38:35,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181857214] [2021-05-06 02:38:35,931 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:38:35,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835642596] [2021-05-06 02:38:35,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835642596] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:38:35,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:38:35,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-06 02:38:35,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547282125] [2021-05-06 02:38:35,933 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 02:38:35,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:38:35,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 02:38:35,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-05-06 02:38:35,936 INFO L87 Difference]: Start difference. First operand 501 states and 693 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 14 states have internal predecessors, (34), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2021-05-06 02:38:36,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:38:36,691 INFO L93 Difference]: Finished difference Result 685 states and 983 transitions. [2021-05-06 02:38:36,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-06 02:38:36,692 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 14 states have internal predecessors, (34), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 104 [2021-05-06 02:38:36,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:38:36,696 INFO L225 Difference]: With dead ends: 685 [2021-05-06 02:38:36,696 INFO L226 Difference]: Without dead ends: 683 [2021-05-06 02:38:36,697 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 351.3ms TimeCoverageRelationStatistics Valid=197, Invalid=733, Unknown=0, NotChecked=0, Total=930 [2021-05-06 02:38:36,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2021-05-06 02:38:36,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 603. [2021-05-06 02:38:36,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 603 states, 341 states have (on average 1.1994134897360704) internal successors, (409), 346 states have internal predecessors, (409), 223 states have call successors, (223), 39 states have call predecessors, (223), 38 states have return successors, (221), 217 states have call predecessors, (221), 221 states have call successors, (221) [2021-05-06 02:38:36,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 853 transitions. [2021-05-06 02:38:36,810 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 853 transitions. Word has length 104 [2021-05-06 02:38:36,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:38:36,811 INFO L480 AbstractCegarLoop]: Abstraction has 603 states and 853 transitions. [2021-05-06 02:38:36,812 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 14 states have internal predecessors, (34), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2021-05-06 02:38:36,812 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 853 transitions. [2021-05-06 02:38:36,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-05-06 02:38:36,814 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:38:36,814 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 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, 1, 1, 1, 1] [2021-05-06 02:38:37,038 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-06 02:38:37,038 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:38:37,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:38:37,039 INFO L82 PathProgramCache]: Analyzing trace with hash -1948981098, now seen corresponding path program 3 times [2021-05-06 02:38:37,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:38:37,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878867897] [2021-05-06 02:38:37,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:38:37,045 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:38:37,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1232193856] [2021-05-06 02:38:37,045 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:38:37,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 02:38:37,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:38:37,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 57 conjunts are in the unsatisfiable core [2021-05-06 02:38:37,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:38:37,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:37,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:37,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:37,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:37,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:37,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:37,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:37,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:37,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:37,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:37,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:37,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:37,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:37,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:37,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:37,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:37,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:37,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:37,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:37,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:37,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:37,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:37,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:37,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:37,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:37,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:37,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:37,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:37,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:37,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:37,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:37,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:37,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:37,942 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 68 proven. 14 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2021-05-06 02:38:37,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:38:37,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878867897] [2021-05-06 02:38:37,943 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:38:37,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232193856] [2021-05-06 02:38:37,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232193856] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:38:37,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:38:37,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-06 02:38:37,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901889973] [2021-05-06 02:38:37,944 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-06 02:38:37,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:38:37,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-06 02:38:37,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-05-06 02:38:37,945 INFO L87 Difference]: Start difference. First operand 603 states and 853 transitions. Second operand has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 02:38:39,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:38:39,821 INFO L93 Difference]: Finished difference Result 688 states and 973 transitions. [2021-05-06 02:38:39,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-06 02:38:39,822 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 108 [2021-05-06 02:38:39,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:38:39,825 INFO L225 Difference]: With dead ends: 688 [2021-05-06 02:38:39,825 INFO L226 Difference]: Without dead ends: 685 [2021-05-06 02:38:39,826 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 921.3ms TimeCoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2021-05-06 02:38:39,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2021-05-06 02:38:39,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 668. [2021-05-06 02:38:39,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 668 states, 375 states have (on average 1.2026666666666668) internal successors, (451), 380 states have internal predecessors, (451), 251 states have call successors, (251), 42 states have call predecessors, (251), 41 states have return successors, (249), 245 states have call predecessors, (249), 249 states have call successors, (249) [2021-05-06 02:38:39,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 951 transitions. [2021-05-06 02:38:39,953 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 951 transitions. Word has length 108 [2021-05-06 02:38:39,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:38:39,953 INFO L480 AbstractCegarLoop]: Abstraction has 668 states and 951 transitions. [2021-05-06 02:38:39,953 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 02:38:39,954 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 951 transitions. [2021-05-06 02:38:39,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-05-06 02:38:39,955 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:38:39,955 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 6, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:38:40,169 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:38:40,169 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:38:40,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:38:40,170 INFO L82 PathProgramCache]: Analyzing trace with hash 826422219, now seen corresponding path program 6 times [2021-05-06 02:38:40,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:38:40,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796979612] [2021-05-06 02:38:40,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:38:40,178 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:38:40,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1386302594] [2021-05-06 02:38:40,179 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:38:40,262 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-06 02:38:40,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:38:40,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 58 conjunts are in the unsatisfiable core [2021-05-06 02:38:40,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:38:40,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:40,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:40,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:40,545 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 91 proven. 35 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-05-06 02:38:40,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:38:40,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796979612] [2021-05-06 02:38:40,545 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:38:40,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386302594] [2021-05-06 02:38:40,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386302594] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:38:40,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:38:40,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 02:38:40,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929355529] [2021-05-06 02:38:40,547 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 02:38:40,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:38:40,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 02:38:40,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:38:40,547 INFO L87 Difference]: Start difference. First operand 668 states and 951 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-06 02:38:41,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:38:41,596 INFO L93 Difference]: Finished difference Result 705 states and 990 transitions. [2021-05-06 02:38:41,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 02:38:41,597 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 5 states have call successors, (14) Word has length 107 [2021-05-06 02:38:41,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:38:41,600 INFO L225 Difference]: With dead ends: 705 [2021-05-06 02:38:41,600 INFO L226 Difference]: Without dead ends: 703 [2021-05-06 02:38:41,601 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 194.2ms TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-05-06 02:38:41,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2021-05-06 02:38:41,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 690. [2021-05-06 02:38:41,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 690 states, 390 states have (on average 1.1948717948717948) internal successors, (466), 397 states have internal predecessors, (466), 255 states have call successors, (255), 45 states have call predecessors, (255), 44 states have return successors, (253), 247 states have call predecessors, (253), 253 states have call successors, (253) [2021-05-06 02:38:41,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 974 transitions. [2021-05-06 02:38:41,733 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 974 transitions. Word has length 107 [2021-05-06 02:38:41,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:38:41,733 INFO L480 AbstractCegarLoop]: Abstraction has 690 states and 974 transitions. [2021-05-06 02:38:41,734 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-06 02:38:41,734 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 974 transitions. [2021-05-06 02:38:41,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-05-06 02:38:41,735 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:38:41,735 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:38:41,948 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:38:41,949 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:38:41,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:38:41,949 INFO L82 PathProgramCache]: Analyzing trace with hash 881872546, now seen corresponding path program 2 times [2021-05-06 02:38:41,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:38:41,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634308388] [2021-05-06 02:38:41,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:38:41,955 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:38:41,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [365577051] [2021-05-06 02:38:41,956 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:38:42,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:38:42,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:38:42,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-06 02:38:42,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:38:42,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:42,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:42,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:42,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:42,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:42,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:42,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:42,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:42,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:42,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:42,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:42,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:42,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:42,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:42,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:42,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:42,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:42,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:42,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:42,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:42,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:42,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:42,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:42,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:42,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:42,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:42,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:42,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:42,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:42,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:42,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:42,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:42,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:42,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:42,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:42,379 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 31 proven. 35 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2021-05-06 02:38:42,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:38:42,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634308388] [2021-05-06 02:38:42,380 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:38:42,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365577051] [2021-05-06 02:38:42,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365577051] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:38:42,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:38:42,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-06 02:38:42,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243269864] [2021-05-06 02:38:42,380 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-06 02:38:42,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:38:42,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-06 02:38:42,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-05-06 02:38:42,381 INFO L87 Difference]: Start difference. First operand 690 states and 974 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 15 states have internal predecessors, (39), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2021-05-06 02:38:43,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:38:43,526 INFO L93 Difference]: Finished difference Result 863 states and 1227 transitions. [2021-05-06 02:38:43,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-06 02:38:43,526 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 15 states have internal predecessors, (39), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 109 [2021-05-06 02:38:43,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:38:43,531 INFO L225 Difference]: With dead ends: 863 [2021-05-06 02:38:43,531 INFO L226 Difference]: Without dead ends: 861 [2021-05-06 02:38:43,532 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 691.9ms TimeCoverageRelationStatistics Valid=289, Invalid=1193, Unknown=0, NotChecked=0, Total=1482 [2021-05-06 02:38:43,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2021-05-06 02:38:43,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 783. [2021-05-06 02:38:43,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 783 states, 437 states have (on average 1.205949656750572) internal successors, (527), 442 states have internal predecessors, (527), 295 states have call successors, (295), 51 states have call predecessors, (295), 50 states have return successors, (293), 289 states have call predecessors, (293), 293 states have call successors, (293) [2021-05-06 02:38:43,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 783 states to 783 states and 1115 transitions. [2021-05-06 02:38:43,666 INFO L78 Accepts]: Start accepts. Automaton has 783 states and 1115 transitions. Word has length 109 [2021-05-06 02:38:43,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:38:43,666 INFO L480 AbstractCegarLoop]: Abstraction has 783 states and 1115 transitions. [2021-05-06 02:38:43,666 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 15 states have internal predecessors, (39), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2021-05-06 02:38:43,667 INFO L276 IsEmpty]: Start isEmpty. Operand 783 states and 1115 transitions. [2021-05-06 02:38:43,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-05-06 02:38:43,668 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:38:43,668 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 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, 1, 1, 1] [2021-05-06 02:38:43,880 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-05-06 02:38:43,881 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:38:43,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:38:43,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1002671399, now seen corresponding path program 4 times [2021-05-06 02:38:43,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:38:43,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368118077] [2021-05-06 02:38:43,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:38:43,887 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:38:43,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [994352216] [2021-05-06 02:38:43,887 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:38:43,974 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 02:38:43,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:38:43,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 72 conjunts are in the unsatisfiable core [2021-05-06 02:38:43,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:38:44,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:44,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:44,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:44,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:44,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:44,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:44,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:44,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:44,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:44,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:44,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:44,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:44,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:44,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:44,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:44,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:44,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:44,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:44,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:44,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:44,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:44,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:44,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:44,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:44,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:44,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:44,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:44,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:44,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:44,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:44,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:44,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:44,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:44,587 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 46 proven. 74 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2021-05-06 02:38:44,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:38:44,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368118077] [2021-05-06 02:38:44,588 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:38:44,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994352216] [2021-05-06 02:38:44,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994352216] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:38:44,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:38:44,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-05-06 02:38:44,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368808269] [2021-05-06 02:38:44,588 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-06 02:38:44,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:38:44,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-06 02:38:44,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-05-06 02:38:44,589 INFO L87 Difference]: Start difference. First operand 783 states and 1115 transitions. Second operand has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) [2021-05-06 02:38:45,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:38:45,358 INFO L93 Difference]: Finished difference Result 956 states and 1331 transitions. [2021-05-06 02:38:45,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-06 02:38:45,358 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) Word has length 111 [2021-05-06 02:38:45,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:38:45,361 INFO L225 Difference]: With dead ends: 956 [2021-05-06 02:38:45,361 INFO L226 Difference]: Without dead ends: 748 [2021-05-06 02:38:45,363 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 631.5ms TimeCoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2021-05-06 02:38:45,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2021-05-06 02:38:45,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 744. [2021-05-06 02:38:45,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 744 states, 419 states have (on average 1.2004773269689737) internal successors, (503), 423 states have internal predecessors, (503), 276 states have call successors, (276), 49 states have call predecessors, (276), 48 states have return successors, (274), 271 states have call predecessors, (274), 274 states have call successors, (274) [2021-05-06 02:38:45,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 1053 transitions. [2021-05-06 02:38:45,502 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 1053 transitions. Word has length 111 [2021-05-06 02:38:45,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:38:45,503 INFO L480 AbstractCegarLoop]: Abstraction has 744 states and 1053 transitions. [2021-05-06 02:38:45,503 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) [2021-05-06 02:38:45,503 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 1053 transitions. [2021-05-06 02:38:45,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-05-06 02:38:45,504 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:38:45,504 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, 1, 1, 1] [2021-05-06 02:38:45,726 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:38:45,727 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:38:45,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:38:45,727 INFO L82 PathProgramCache]: Analyzing trace with hash 890766036, now seen corresponding path program 5 times [2021-05-06 02:38:45,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:38:45,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012549203] [2021-05-06 02:38:45,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:38:45,733 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:38:45,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [764557474] [2021-05-06 02:38:45,733 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:38:45,819 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-06 02:38:45,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:38:45,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 87 conjunts are in the unsatisfiable core [2021-05-06 02:38:45,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:38:46,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:46,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:46,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:46,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:46,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:46,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:46,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:46,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:46,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:46,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:46,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:46,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:46,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:46,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:46,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:46,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:46,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:46,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:46,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:46,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:46,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:46,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:46,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:46,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:46,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:46,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:46,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:46,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:46,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:46,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:46,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:46,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:46,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:46,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:46,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:46,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:46,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:46,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:46,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:46,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:46,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:46,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:46,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:47,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:47,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:47,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:47,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:47,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:38:47,927 WARN L159 QuantifierPusher]: Ignoring assumption.