/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/divbin_unwindbound100.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 02:09:31,545 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 02:09:31,552 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 02:09:31,619 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 02:09:31,619 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 02:09:31,621 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 02:09:31,624 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 02:09:31,628 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 02:09:31,630 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 02:09:31,633 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 02:09:31,634 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 02:09:31,635 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 02:09:31,635 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 02:09:31,637 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 02:09:31,638 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 02:09:31,639 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 02:09:31,641 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 02:09:31,641 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 02:09:31,643 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 02:09:31,648 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 02:09:31,649 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 02:09:31,650 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 02:09:31,652 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 02:09:31,653 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 02:09:31,657 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-05-06 02:09:31,658 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-05-06 02:09:31,658 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-05-06 02:09:31,659 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-05-06 02:09:31,659 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-05-06 02:09:31,660 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-05-06 02:09:31,660 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-06 02:09:31,661 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-06 02:09:31,662 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-06 02:09:31,662 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-06 02:09:31,663 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-06 02:09:31,663 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-06 02:09:31,664 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-06 02:09:31,664 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-06 02:09:31,664 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 02:09:31,666 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 02:09:31,666 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 02:09:31,670 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 02:09:31,712 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 02:09:31,712 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 02:09:31,715 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 02:09:31,715 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 02:09:31,715 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 02:09:31,715 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 02:09:31,715 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 02:09:31,715 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 02:09:31,716 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 02:09:31,716 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 02:09:31,716 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 02:09:31,717 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 02:09:31,717 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 02:09:31,717 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 02:09:31,717 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 02:09:31,717 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 02:09:31,717 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 02:09:31,717 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 02:09:31,718 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 02:09:31,718 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 02:09:31,718 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 02:09:31,718 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 02:09:31,718 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 02:09:31,718 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 02:09:31,718 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 02:09:31,719 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 02:09:31,719 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 02:09:31,719 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 02:09:31,719 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 02:09:32,172 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 02:09:32,210 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 02:09:32,212 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 02:09:32,213 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 02:09:32,221 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 02:09:32,222 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/divbin_unwindbound100.i [2021-05-06 02:09:32,296 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ad8ef730/963b62c2ade847d99479ebe64feee267/FLAG4481e80bf [2021-05-06 02:09:32,817 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 02:09:32,817 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin_unwindbound100.i [2021-05-06 02:09:32,822 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ad8ef730/963b62c2ade847d99479ebe64feee267/FLAG4481e80bf [2021-05-06 02:09:33,248 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ad8ef730/963b62c2ade847d99479ebe64feee267 [2021-05-06 02:09:33,250 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 02:09:33,251 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 02:09:33,265 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 02:09:33,265 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 02:09:33,268 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 02:09:33,269 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 02:09:33" (1/1) ... [2021-05-06 02:09:33,269 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65909303 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:09:33, skipping insertion in model container [2021-05-06 02:09:33,270 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 02:09:33" (1/1) ... [2021-05-06 02:09:33,275 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 02:09:33,301 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 02:09:33,490 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/divbin_unwindbound100.i[958,971] [2021-05-06 02:09:33,582 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 02:09:33,588 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 02:09:33,600 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/divbin_unwindbound100.i[958,971] [2021-05-06 02:09:33,619 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 02:09:33,630 INFO L208 MainTranslator]: Completed translation [2021-05-06 02:09:33,631 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:09:33 WrapperNode [2021-05-06 02:09:33,631 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 02:09:33,632 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 02:09:33,632 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 02:09:33,633 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 02:09:33,641 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:09:33" (1/1) ... [2021-05-06 02:09:33,642 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:09:33" (1/1) ... [2021-05-06 02:09:33,647 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:09:33" (1/1) ... [2021-05-06 02:09:33,647 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:09:33" (1/1) ... [2021-05-06 02:09:33,658 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:09:33" (1/1) ... [2021-05-06 02:09:33,662 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:09:33" (1/1) ... [2021-05-06 02:09:33,666 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:09:33" (1/1) ... [2021-05-06 02:09:33,670 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 02:09:33,671 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 02:09:33,671 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 02:09:33,671 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 02:09:33,671 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:09:33" (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 02:09:33,739 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 02:09:33,740 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 02:09:33,740 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 02:09:33,740 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 02:09:33,740 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 02:09:33,740 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 02:09:33,740 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 02:09:33,741 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 02:09:33,741 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-06 02:09:33,741 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-06 02:09:33,741 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 02:09:33,741 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 02:09:33,742 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-06 02:09:33,742 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 02:09:33,742 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 02:09:33,742 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 02:09:33,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 02:09:33,742 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 02:09:33,743 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 02:09:33,743 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 02:09:33,743 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 02:09:33,743 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 02:09:34,137 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 02:09:34,138 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 02:09:34,143 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 02:09:34 BoogieIcfgContainer [2021-05-06 02:09:34,143 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 02:09:34,145 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 02:09:34,145 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 02:09:34,147 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 02:09:34,147 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 02:09:33" (1/3) ... [2021-05-06 02:09:34,167 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@94400f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 02:09:34, skipping insertion in model container [2021-05-06 02:09:34,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:09:33" (2/3) ... [2021-05-06 02:09:34,168 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@94400f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 02:09:34, skipping insertion in model container [2021-05-06 02:09:34,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 02:09:34" (3/3) ... [2021-05-06 02:09:34,169 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin_unwindbound100.i [2021-05-06 02:09:34,173 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 02:09:34,176 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 02:09:34,197 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 02:09:34,259 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 02:09:34,259 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 02:09:34,259 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 02:09:34,259 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 02:09:34,259 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 02:09:34,259 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 02:09:34,259 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 02:09:34,259 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 02:09:34,282 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 02:09:34,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 02:09:34,295 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:09:34,295 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:09:34,295 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:09:34,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:09:34,300 INFO L82 PathProgramCache]: Analyzing trace with hash 878397729, now seen corresponding path program 1 times [2021-05-06 02:09:34,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:09:34,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642756620] [2021-05-06 02:09:34,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:09:34,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:09:34,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 02:09:34,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:09:34,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 02:09:34,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:09:34,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-06 02:09:34,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:09:34,701 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 02:09:34,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:09:34,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642756620] [2021-05-06 02:09:34,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642756620] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:09:34,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:09:34,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 02:09:34,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502815978] [2021-05-06 02:09:34,706 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 02:09:34,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:09:34,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 02:09:34,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 02:09:34,743 INFO L87 Difference]: Start difference. First operand has 33 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 02:09:35,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:09:35,083 INFO L93 Difference]: Finished difference Result 60 states and 84 transitions. [2021-05-06 02:09:35,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 02:09:35,085 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-06 02:09:35,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:09:35,090 INFO L225 Difference]: With dead ends: 60 [2021-05-06 02:09:35,090 INFO L226 Difference]: Without dead ends: 29 [2021-05-06 02:09:35,093 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 127.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 02:09:35,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-06 02:09:35,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2021-05-06 02:09:35,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 02:09:35,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2021-05-06 02:09:35,132 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 23 [2021-05-06 02:09:35,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:09:35,133 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2021-05-06 02:09:35,133 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 02:09:35,133 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2021-05-06 02:09:35,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-06 02:09:35,135 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:09:35,135 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:09:35,135 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 02:09:35,135 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:09:35,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:09:35,136 INFO L82 PathProgramCache]: Analyzing trace with hash 994169231, now seen corresponding path program 1 times [2021-05-06 02:09:35,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:09:35,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073395657] [2021-05-06 02:09:35,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:09:35,185 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:09:35,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1029398309] [2021-05-06 02:09:35,185 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 02:09:35,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:09:35,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 02:09:35,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:09:35,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:09:35,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:09:35,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:09:35,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:09:35,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:09:35,489 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 02:09:35,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:09:35,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073395657] [2021-05-06 02:09:35,490 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:09:35,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029398309] [2021-05-06 02:09:35,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029398309] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:09:35,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:09:35,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 02:09:35,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068075071] [2021-05-06 02:09:35,492 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 02:09:35,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:09:35,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 02:09:35,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 02:09:35,493 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 02:09:35,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:09:35,513 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2021-05-06 02:09:35,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 02:09:35,518 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2021-05-06 02:09:35,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:09:35,518 INFO L225 Difference]: With dead ends: 42 [2021-05-06 02:09:35,518 INFO L226 Difference]: Without dead ends: 30 [2021-05-06 02:09:35,519 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.7ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 02:09:35,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-05-06 02:09:35,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-05-06 02:09:35,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 02:09:35,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2021-05-06 02:09:35,525 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 25 [2021-05-06 02:09:35,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:09:35,526 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2021-05-06 02:09:35,526 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 02:09:35,526 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2021-05-06 02:09:35,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-06 02:09:35,527 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:09:35,527 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:09:35,748 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 02:09:35,748 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:09:35,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:09:35,749 INFO L82 PathProgramCache]: Analyzing trace with hash 422434646, now seen corresponding path program 1 times [2021-05-06 02:09:35,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:09:35,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789865074] [2021-05-06 02:09:35,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:09:35,765 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:09:35,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2070122117] [2021-05-06 02:09:35,765 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 02:09:35,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:09:35,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 02:09:35,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:09:35,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:09:35,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:09:35,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:09:35,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:09:36,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:09:36,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:09:36,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:09:36,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:09:36,208 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 02:09:36,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:09:36,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789865074] [2021-05-06 02:09:36,209 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:09:36,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070122117] [2021-05-06 02:09:36,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070122117] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:09:36,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:09:36,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 02:09:36,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657309249] [2021-05-06 02:09:36,211 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 02:09:36,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:09:36,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 02:09:36,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:09:36,212 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 02:09:36,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:09:36,329 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2021-05-06 02:09:36,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 02:09:36,330 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2021-05-06 02:09:36,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:09:36,332 INFO L225 Difference]: With dead ends: 41 [2021-05-06 02:09:36,332 INFO L226 Difference]: Without dead ends: 34 [2021-05-06 02:09:36,332 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 83.7ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:09:36,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-06 02:09:36,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2021-05-06 02:09:36,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 02:09:36,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2021-05-06 02:09:36,343 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 26 [2021-05-06 02:09:36,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:09:36,344 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2021-05-06 02:09:36,344 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 02:09:36,344 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2021-05-06 02:09:36,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-06 02:09:36,345 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:09:36,346 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:09:36,564 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:09:36,564 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:09:36,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:09:36,565 INFO L82 PathProgramCache]: Analyzing trace with hash 424222106, now seen corresponding path program 1 times [2021-05-06 02:09:36,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:09:36,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134488085] [2021-05-06 02:09:36,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:09:36,581 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:09:36,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [465406133] [2021-05-06 02:09:36,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 02:09:36,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:09:36,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 02:09:36,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:09:36,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:09:36,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:09:36,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:09:36,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:09:36,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:09:36,970 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 02:09:36,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:09:36,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134488085] [2021-05-06 02:09:36,970 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:09:36,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465406133] [2021-05-06 02:09:36,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465406133] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:09:36,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:09:36,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 02:09:36,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825528729] [2021-05-06 02:09:36,971 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 02:09:36,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:09:36,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 02:09:36,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:09:36,973 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 02:09:37,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:09:37,180 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2021-05-06 02:09:37,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 02:09:37,180 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2021-05-06 02:09:37,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:09:37,181 INFO L225 Difference]: With dead ends: 45 [2021-05-06 02:09:37,181 INFO L226 Difference]: Without dead ends: 42 [2021-05-06 02:09:37,181 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 205.6ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:09:37,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-06 02:09:37,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2021-05-06 02:09:37,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 29 states have internal predecessors, (36), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 02:09:37,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2021-05-06 02:09:37,186 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 26 [2021-05-06 02:09:37,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:09:37,186 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2021-05-06 02:09:37,187 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 02:09:37,187 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2021-05-06 02:09:37,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 02:09:37,187 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:09:37,187 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:09:37,408 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:09:37,409 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:09:37,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:09:37,410 INFO L82 PathProgramCache]: Analyzing trace with hash -193375877, now seen corresponding path program 1 times [2021-05-06 02:09:37,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:09:37,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295463243] [2021-05-06 02:09:37,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:09:37,429 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:09:37,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [373377942] [2021-05-06 02:09:37,429 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 02:09:37,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:09:37,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 02:09:37,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:09:37,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:09:37,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:09:37,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:09:37,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:09:37,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:09:37,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:09:37,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:09:37,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:09:37,545 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 02:09:37,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:09:37,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295463243] [2021-05-06 02:09:37,545 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:09:37,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373377942] [2021-05-06 02:09:37,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373377942] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:09:37,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:09:37,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-06 02:09:37,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112795649] [2021-05-06 02:09:37,546 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 02:09:37,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:09:37,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 02:09:37,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:09:37,547 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 02:09:37,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:09:37,578 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2021-05-06 02:09:37,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 02:09:37,582 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2021-05-06 02:09:37,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:09:37,585 INFO L225 Difference]: With dead ends: 55 [2021-05-06 02:09:37,586 INFO L226 Difference]: Without dead ends: 43 [2021-05-06 02:09:37,586 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 12.4ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:09:37,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-06 02:09:37,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2021-05-06 02:09:37,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 31 states have internal predecessors, (38), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 02:09:37,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2021-05-06 02:09:37,596 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 28 [2021-05-06 02:09:37,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:09:37,597 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2021-05-06 02:09:37,597 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 02:09:37,597 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2021-05-06 02:09:37,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-06 02:09:37,601 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:09:37,601 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:09:37,801 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:09:37,802 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:09:37,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:09:37,802 INFO L82 PathProgramCache]: Analyzing trace with hash -2031725334, now seen corresponding path program 1 times [2021-05-06 02:09:37,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:09:37,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925440471] [2021-05-06 02:09:37,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:09:37,812 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:09:37,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1378350143] [2021-05-06 02:09:37,812 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 02:09:37,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:09:37,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 02:09:37,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:09:37,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:09:37,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:09:37,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:09:37,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:09:37,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:09:37,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:09:37,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:09:37,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:09:37,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:09:37,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:09:37,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:09:37,938 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 02:09:37,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:09:37,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925440471] [2021-05-06 02:09:37,938 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:09:37,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378350143] [2021-05-06 02:09:37,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378350143] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:09:37,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:09:37,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 02:09:37,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221075969] [2021-05-06 02:09:37,939 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 02:09:37,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:09:37,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 02:09:37,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:09:37,940 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 02:09:37,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:09:37,977 INFO L93 Difference]: Finished difference Result 64 states and 74 transitions. [2021-05-06 02:09:37,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 02:09:37,977 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2021-05-06 02:09:37,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:09:37,978 INFO L225 Difference]: With dead ends: 64 [2021-05-06 02:09:37,978 INFO L226 Difference]: Without dead ends: 57 [2021-05-06 02:09:37,978 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 17.4ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:09:37,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-05-06 02:09:37,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2021-05-06 02:09:37,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 40 states have (on average 1.25) internal successors, (50), 41 states have internal predecessors, (50), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 02:09:37,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2021-05-06 02:09:37,983 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 29 [2021-05-06 02:09:37,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:09:37,983 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2021-05-06 02:09:37,984 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 02:09:37,984 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2021-05-06 02:09:37,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-06 02:09:37,984 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:09:37,984 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:09:38,193 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-06 02:09:38,193 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:09:38,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:09:38,194 INFO L82 PathProgramCache]: Analyzing trace with hash -2029937874, now seen corresponding path program 1 times [2021-05-06 02:09:38,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:09:38,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614680968] [2021-05-06 02:09:38,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:09:38,204 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:09:38,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [53482529] [2021-05-06 02:09:38,204 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 02:09:38,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:09:38,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 02:09:38,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:09:38,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:09:38,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:09:38,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:09:38,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:09:38,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:09:38,453 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 02:09:38,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:09:38,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614680968] [2021-05-06 02:09:38,453 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:09:38,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53482529] [2021-05-06 02:09:38,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53482529] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:09:38,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:09:38,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 02:09:38,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512349381] [2021-05-06 02:09:38,454 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 02:09:38,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:09:38,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 02:09:38,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:09:38,457 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 02:09:40,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:09:40,849 INFO L93 Difference]: Finished difference Result 73 states and 88 transitions. [2021-05-06 02:09:40,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 02:09:40,850 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 29 [2021-05-06 02:09:40,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:09:40,850 INFO L225 Difference]: With dead ends: 73 [2021-05-06 02:09:40,850 INFO L226 Difference]: Without dead ends: 68 [2021-05-06 02:09:40,851 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 126.6ms TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-05-06 02:09:40,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-06 02:09:40,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 61. [2021-05-06 02:09:40,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 45 states have (on average 1.2) internal successors, (54), 46 states have internal predecessors, (54), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 02:09:40,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2021-05-06 02:09:40,856 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 29 [2021-05-06 02:09:40,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:09:40,856 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2021-05-06 02:09:40,856 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 02:09:40,856 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2021-05-06 02:09:40,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-06 02:09:40,857 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:09:40,857 INFO L523 BasicCegarLoop]: trace histogram [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] [2021-05-06 02:09:41,057 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:09:41,058 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:09:41,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:09:41,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1731935178, now seen corresponding path program 1 times [2021-05-06 02:09:41,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:09:41,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790119354] [2021-05-06 02:09:41,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:09:41,068 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:09:41,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2012686313] [2021-05-06 02:09:41,068 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 02:09:41,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:09:41,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-06 02:09:41,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:09:41,194 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 02:09:41,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:09:41,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790119354] [2021-05-06 02:09:41,195 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:09:41,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012686313] [2021-05-06 02:09:41,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012686313] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:09:41,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:09:41,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 02:09:41,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168724877] [2021-05-06 02:09:41,195 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 02:09:41,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:09:41,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 02:09:41,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 02:09:41,196 INFO L87 Difference]: Start difference. First operand 61 states and 70 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 02:09:41,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:09:41,217 INFO L93 Difference]: Finished difference Result 73 states and 85 transitions. [2021-05-06 02:09:41,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 02:09:41,218 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2021-05-06 02:09:41,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:09:41,218 INFO L225 Difference]: With dead ends: 73 [2021-05-06 02:09:41,218 INFO L226 Difference]: Without dead ends: 41 [2021-05-06 02:09:41,219 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 02:09:41,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-06 02:09:41,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-05-06 02:09:41,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 29 states have (on average 1.206896551724138) internal successors, (35), 30 states have internal predecessors, (35), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 02:09:41,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2021-05-06 02:09:41,222 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 35 [2021-05-06 02:09:41,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:09:41,222 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2021-05-06 02:09:41,223 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 02:09:41,223 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2021-05-06 02:09:41,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-06 02:09:41,223 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:09:41,223 INFO L523 BasicCegarLoop]: trace histogram [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 02:09:41,428 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:09:41,429 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:09:41,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:09:41,433 INFO L82 PathProgramCache]: Analyzing trace with hash 815990494, now seen corresponding path program 1 times [2021-05-06 02:09:41,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:09:41,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929960809] [2021-05-06 02:09:41,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:09:41,442 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:09:41,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1206512795] [2021-05-06 02:09:41,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:09:41,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:09:41,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 02:09:41,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:09:41,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:09:41,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:09:41,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:09:41,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:09:41,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:09:41,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:09:41,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:09:41,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:09:41,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:09:41,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:09:41,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:09:41,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:09:41,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:09:41,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:09:41,596 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 02:09:41,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:09:41,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929960809] [2021-05-06 02:09:41,596 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:09:41,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206512795] [2021-05-06 02:09:41,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206512795] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:09:41,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:09:41,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 02:09:41,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278933934] [2021-05-06 02:09:41,599 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 02:09:41,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:09:41,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 02:09:41,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:09:41,599 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 02:09:41,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:09:41,652 INFO L93 Difference]: Finished difference Result 66 states and 76 transitions. [2021-05-06 02:09:41,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 02:09:41,652 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 38 [2021-05-06 02:09:41,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:09:41,654 INFO L225 Difference]: With dead ends: 66 [2021-05-06 02:09:41,654 INFO L226 Difference]: Without dead ends: 59 [2021-05-06 02:09:41,654 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 30.3ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:09:41,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-05-06 02:09:41,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 53. [2021-05-06 02:09:41,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 39 states have (on average 1.205128205128205) internal successors, (47), 40 states have internal predecessors, (47), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 02:09:41,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2021-05-06 02:09:41,665 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 38 [2021-05-06 02:09:41,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:09:41,666 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2021-05-06 02:09:41,666 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 02:09:41,666 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2021-05-06 02:09:41,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-06 02:09:41,669 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:09:41,669 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:09:41,876 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-06 02:09:41,877 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:09:41,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:09:41,877 INFO L82 PathProgramCache]: Analyzing trace with hash 817777954, now seen corresponding path program 1 times [2021-05-06 02:09:41,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:09:41,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517758240] [2021-05-06 02:09:41,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:09:41,902 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:09:41,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1515001522] [2021-05-06 02:09:41,902 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