/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/sqrt1-ll_unwindbound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 05:10:58,549 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 05:10:58,550 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 05:10:58,568 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 05:10:58,569 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 05:10:58,569 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 05:10:58,570 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 05:10:58,571 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 05:10:58,572 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 05:10:58,573 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 05:10:58,574 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 05:10:58,574 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 05:10:58,574 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 05:10:58,575 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 05:10:58,576 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 05:10:58,576 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 05:10:58,577 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 05:10:58,577 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 05:10:58,578 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 05:10:58,580 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 05:10:58,580 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 05:10:58,581 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 05:10:58,582 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 05:10:58,582 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 05:10:58,584 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-05-06 05:10:58,584 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-05-06 05:10:58,584 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-05-06 05:10:58,585 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-05-06 05:10:58,585 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-05-06 05:10:58,586 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-05-06 05:10:58,586 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-06 05:10:58,586 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-06 05:10:58,587 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-06 05:10:58,587 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-06 05:10:58,588 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-06 05:10:58,588 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-06 05:10:58,588 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-06 05:10:58,589 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-06 05:10:58,589 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 05:10:58,589 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 05:10:58,590 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 05:10:58,590 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 05:10:58,609 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 05:10:58,610 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 05:10:58,611 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 05:10:58,611 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 05:10:58,611 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 05:10:58,611 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 05:10:58,611 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 05:10:58,611 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 05:10:58,611 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 05:10:58,612 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 05:10:58,612 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 05:10:58,612 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 05:10:58,612 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 05:10:58,612 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 05:10:58,612 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 05:10:58,612 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 05:10:58,612 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 05:10:58,613 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 05:10:58,613 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 05:10:58,613 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 05:10:58,613 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 05:10:58,613 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 05:10:58,613 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 05:10:58,613 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 05:10:58,614 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 05:10:58,614 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 05:10:58,614 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 05:10:58,614 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 05:10:58,614 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 05:10:58,831 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 05:10:58,851 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 05:10:58,853 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 05:10:58,854 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 05:10:58,855 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 05:10:58,855 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_unwindbound5.c [2021-05-06 05:10:58,900 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2135ec07a/7b4b641456eb4fb4867fa61557dd85c7/FLAG9584020e6 [2021-05-06 05:10:59,257 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 05:10:59,258 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_unwindbound5.c [2021-05-06 05:10:59,262 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2135ec07a/7b4b641456eb4fb4867fa61557dd85c7/FLAG9584020e6 [2021-05-06 05:10:59,674 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2135ec07a/7b4b641456eb4fb4867fa61557dd85c7 [2021-05-06 05:10:59,676 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 05:10:59,677 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 05:10:59,683 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 05:10:59,684 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 05:10:59,686 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 05:10:59,687 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 05:10:59" (1/1) ... [2021-05-06 05:10:59,688 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39c9d8b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:10:59, skipping insertion in model container [2021-05-06 05:10:59,688 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 05:10:59" (1/1) ... [2021-05-06 05:10:59,692 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 05:10:59,702 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 05:10:59,793 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/sqrt1-ll_unwindbound5.c[520,533] [2021-05-06 05:10:59,805 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 05:10:59,813 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 05:10:59,826 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/sqrt1-ll_unwindbound5.c[520,533] [2021-05-06 05:10:59,840 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 05:10:59,852 INFO L208 MainTranslator]: Completed translation [2021-05-06 05:10:59,852 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:10:59 WrapperNode [2021-05-06 05:10:59,852 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 05:10:59,855 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 05:10:59,855 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 05:10:59,856 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 05:10:59,892 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:10:59" (1/1) ... [2021-05-06 05:10:59,898 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:10:59" (1/1) ... [2021-05-06 05:10:59,903 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:10:59" (1/1) ... [2021-05-06 05:10:59,903 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:10:59" (1/1) ... [2021-05-06 05:10:59,913 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:10:59" (1/1) ... [2021-05-06 05:10:59,917 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:10:59" (1/1) ... [2021-05-06 05:10:59,918 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:10:59" (1/1) ... [2021-05-06 05:10:59,923 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 05:10:59,924 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 05:10:59,924 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 05:10:59,924 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 05:10:59,925 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:10:59" (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 05:11:00,008 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 05:11:00,009 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 05:11:00,009 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 05:11:00,009 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 05:11:00,009 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 05:11:00,009 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 05:11:00,009 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 05:11:00,010 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 05:11:00,010 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 05:11:00,010 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 05:11:00,010 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 05:11:00,010 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 05:11:00,011 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 05:11:00,011 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 05:11:00,011 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 05:11:00,011 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 05:11:00,011 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 05:11:00,012 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 05:11:00,012 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 05:11:00,012 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 05:11:00,245 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 05:11:00,246 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 05:11:00,246 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 05:11:00 BoogieIcfgContainer [2021-05-06 05:11:00,247 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 05:11:00,247 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 05:11:00,248 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 05:11:00,249 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 05:11:00,249 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 05:10:59" (1/3) ... [2021-05-06 05:11:00,250 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5026f81d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 05:11:00, skipping insertion in model container [2021-05-06 05:11:00,250 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:10:59" (2/3) ... [2021-05-06 05:11:00,250 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5026f81d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 05:11:00, skipping insertion in model container [2021-05-06 05:11:00,250 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 05:11:00" (3/3) ... [2021-05-06 05:11:00,251 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt1-ll_unwindbound5.c [2021-05-06 05:11:00,255 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 05:11:00,257 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 05:11:00,277 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 05:11:00,299 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 05:11:00,300 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 05:11:00,300 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 05:11:00,300 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 05:11:00,300 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 05:11:00,300 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 05:11:00,300 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 05:11:00,300 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 05:11:00,315 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 05:11:00,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-06 05:11:00,318 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:11:00,318 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:11:00,318 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:11:00,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:11:00,326 INFO L82 PathProgramCache]: Analyzing trace with hash -643130361, now seen corresponding path program 1 times [2021-05-06 05:11:00,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:11:00,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158005515] [2021-05-06 05:11:00,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:11:00,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:11:00,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 05:11:00,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:11:00,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 05:11:00,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:11:00,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158005515] [2021-05-06 05:11:00,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158005515] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 05:11:00,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 05:11:00,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 05:11:00,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820725623] [2021-05-06 05:11:00,507 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 05:11:00,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:11:00,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 05:11:00,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 05:11:00,516 INFO L87 Difference]: Start difference. First operand has 26 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 05:11:00,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:11:00,637 INFO L93 Difference]: Finished difference Result 47 states and 70 transitions. [2021-05-06 05:11:00,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 05:11:00,639 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-06 05:11:00,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:11:00,643 INFO L225 Difference]: With dead ends: 47 [2021-05-06 05:11:00,644 INFO L226 Difference]: Without dead ends: 22 [2021-05-06 05:11:00,647 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 05:11:00,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-05-06 05:11:00,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2021-05-06 05:11:00,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 05:11:00,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2021-05-06 05:11:00,680 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 11 [2021-05-06 05:11:00,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:11:00,680 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2021-05-06 05:11:00,680 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 05:11:00,681 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2021-05-06 05:11:00,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 05:11:00,682 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:11:00,682 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:11:00,682 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 05:11:00,682 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:11:00,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:11:00,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1070997212, now seen corresponding path program 1 times [2021-05-06 05:11:00,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:11:00,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640430235] [2021-05-06 05:11:00,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:11:00,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:11:00,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 05:11:00,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:11:00,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 05:11:00,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:11:00,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640430235] [2021-05-06 05:11:00,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640430235] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 05:11:00,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 05:11:00,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 05:11:00,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041171558] [2021-05-06 05:11:00,800 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 05:11:00,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:11:00,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 05:11:00,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 05:11:00,801 INFO L87 Difference]: Start difference. First operand 21 states and 27 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 05:11:00,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:11:00,908 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2021-05-06 05:11:00,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 05:11:00,908 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-06 05:11:00,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:11:00,909 INFO L225 Difference]: With dead ends: 32 [2021-05-06 05:11:00,909 INFO L226 Difference]: Without dead ends: 23 [2021-05-06 05:11:00,910 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 61.2ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 05:11:00,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-05-06 05:11:00,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-05-06 05:11:00,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 05:11:00,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2021-05-06 05:11:00,915 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 12 [2021-05-06 05:11:00,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:11:00,915 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2021-05-06 05:11:00,915 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 05:11:00,915 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2021-05-06 05:11:00,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 05:11:00,915 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:11:00,916 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:11:00,916 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 05:11:00,916 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:11:00,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:11:00,916 INFO L82 PathProgramCache]: Analyzing trace with hash 1072665508, now seen corresponding path program 1 times [2021-05-06 05:11:00,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:11:00,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942632541] [2021-05-06 05:11:00,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:11:00,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:11:00,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 05:11:00,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:11:00,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 05:11:00,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:11:00,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942632541] [2021-05-06 05:11:00,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942632541] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 05:11:00,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 05:11:00,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 05:11:00,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947318435] [2021-05-06 05:11:00,980 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 05:11:00,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:11:00,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 05:11:00,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 05:11:00,981 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 05:11:01,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:11:01,193 INFO L93 Difference]: Finished difference Result 36 states and 47 transitions. [2021-05-06 05:11:01,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 05:11:01,194 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-06 05:11:01,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:11:01,195 INFO L225 Difference]: With dead ends: 36 [2021-05-06 05:11:01,196 INFO L226 Difference]: Without dead ends: 34 [2021-05-06 05:11:01,197 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 123.7ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 05:11:01,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-06 05:11:01,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2021-05-06 05:11:01,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 16 states have (on average 1.25) internal successors, (20), 18 states have internal predecessors, (20), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 05:11:01,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2021-05-06 05:11:01,215 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 12 [2021-05-06 05:11:01,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:11:01,215 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2021-05-06 05:11:01,216 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 05:11:01,216 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2021-05-06 05:11:01,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 05:11:01,217 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:11:01,217 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:11:01,217 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-06 05:11:01,217 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:11:01,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:11:01,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1640566567, now seen corresponding path program 1 times [2021-05-06 05:11:01,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:11:01,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276973817] [2021-05-06 05:11:01,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:11:01,234 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:11:01,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [744823240] [2021-05-06 05:11:01,234 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 05:11:01,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:11:01,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 05:11:01,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:11:01,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:01,382 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 05:11:01,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:11:01,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276973817] [2021-05-06 05:11:01,382 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:11:01,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744823240] [2021-05-06 05:11:01,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744823240] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 05:11:01,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 05:11:01,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 05:11:01,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488698532] [2021-05-06 05:11:01,383 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 05:11:01,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:11:01,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 05:11:01,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 05:11:01,384 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 05:11:01,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:11:01,420 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2021-05-06 05:11:01,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 05:11:01,421 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2021-05-06 05:11:01,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:11:01,421 INFO L225 Difference]: With dead ends: 40 [2021-05-06 05:11:01,421 INFO L226 Difference]: Without dead ends: 38 [2021-05-06 05:11:01,422 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.4ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 05:11:01,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-06 05:11:01,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2021-05-06 05:11:01,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 21 states have internal predecessors, (23), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 05:11:01,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2021-05-06 05:11:01,427 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 17 [2021-05-06 05:11:01,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:11:01,427 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2021-05-06 05:11:01,427 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 05:11:01,427 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2021-05-06 05:11:01,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 05:11:01,428 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:11:01,428 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:11:01,640 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:11:01,641 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:11:01,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:11:01,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1129080132, now seen corresponding path program 1 times [2021-05-06 05:11:01,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:11:01,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872207743] [2021-05-06 05:11:01,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:11:01,654 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:11:01,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [997867247] [2021-05-06 05:11:01,654 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 05:11:01,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:11:01,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 05:11:01,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:11:01,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:01,788 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 05:11:01,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:11:01,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872207743] [2021-05-06 05:11:01,789 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:11:01,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997867247] [2021-05-06 05:11:01,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997867247] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 05:11:01,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 05:11:01,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 05:11:01,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824851501] [2021-05-06 05:11:01,790 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 05:11:01,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:11:01,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 05:11:01,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 05:11:01,790 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 05:11:01,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:11:01,827 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2021-05-06 05:11:01,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 05:11:01,827 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-06 05:11:01,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:11:01,829 INFO L225 Difference]: With dead ends: 44 [2021-05-06 05:11:01,829 INFO L226 Difference]: Without dead ends: 39 [2021-05-06 05:11:01,829 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.1ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 05:11:01,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-06 05:11:01,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-05-06 05:11:01,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 11 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 05:11:01,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2021-05-06 05:11:01,838 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 22 [2021-05-06 05:11:01,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:11:01,839 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2021-05-06 05:11:01,839 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 05:11:01,839 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2021-05-06 05:11:01,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-06 05:11:01,840 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:11:01,840 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:11:02,048 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:11:02,049 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:11:02,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:11:02,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1326533350, now seen corresponding path program 1 times [2021-05-06 05:11:02,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:11:02,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282492455] [2021-05-06 05:11:02,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:11:02,056 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:11:02,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1074330670] [2021-05-06 05:11:02,057 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 05:11:02,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:11:02,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 05:11:02,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:11:02,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:02,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:02,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:02,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:02,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:02,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:02,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:02,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:02,190 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 05:11:02,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:11:02,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282492455] [2021-05-06 05:11:02,190 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:11:02,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074330670] [2021-05-06 05:11:02,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074330670] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:11:02,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 05:11:02,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-06 05:11:02,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947360606] [2021-05-06 05:11:02,191 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 05:11:02,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:11:02,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 05:11:02,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 05:11:02,192 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 05:11:02,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:11:02,222 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2021-05-06 05:11:02,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 05:11:02,223 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2021-05-06 05:11:02,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:11:02,223 INFO L225 Difference]: With dead ends: 50 [2021-05-06 05:11:02,223 INFO L226 Difference]: Without dead ends: 41 [2021-05-06 05:11:02,224 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 11.0ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 05:11:02,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-06 05:11:02,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-05-06 05:11:02,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 24 states have (on average 1.125) internal successors, (27), 25 states have internal predecessors, (27), 11 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 05:11:02,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2021-05-06 05:11:02,228 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 30 [2021-05-06 05:11:02,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:11:02,228 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2021-05-06 05:11:02,228 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 05:11:02,228 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2021-05-06 05:11:02,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-06 05:11:02,229 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:11:02,229 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:11:02,444 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:11:02,445 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:11:02,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:11:02,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1324865054, now seen corresponding path program 1 times [2021-05-06 05:11:02,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:11:02,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5545720] [2021-05-06 05:11:02,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:11:02,452 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:11:02,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2001409653] [2021-05-06 05:11:02,452 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 05:11:02,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:11:02,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 05:11:02,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:11:02,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:02,618 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 05:11:02,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:11:02,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5545720] [2021-05-06 05:11:02,618 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:11:02,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001409653] [2021-05-06 05:11:02,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001409653] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:11:02,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 05:11:02,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 05:11:02,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632795551] [2021-05-06 05:11:02,619 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 05:11:02,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:11:02,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 05:11:02,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 05:11:02,620 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 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 05:11:02,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:11:02,682 INFO L93 Difference]: Finished difference Result 54 states and 65 transitions. [2021-05-06 05:11:02,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 05:11:02,683 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 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 30 [2021-05-06 05:11:02,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:11:02,683 INFO L225 Difference]: With dead ends: 54 [2021-05-06 05:11:02,683 INFO L226 Difference]: Without dead ends: 52 [2021-05-06 05:11:02,684 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.7ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 05:11:02,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-06 05:11:02,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2021-05-06 05:11:02,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 30 states have internal predecessors, (32), 15 states have call successors, (15), 7 states have call predecessors, (15), 6 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 05:11:02,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2021-05-06 05:11:02,689 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 30 [2021-05-06 05:11:02,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:11:02,689 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2021-05-06 05:11:02,689 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 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 05:11:02,689 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2021-05-06 05:11:02,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-06 05:11:02,690 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:11:02,690 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:11:02,900 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:11:02,903 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:11:02,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:11:02,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1080733609, now seen corresponding path program 2 times [2021-05-06 05:11:02,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:11:02,903 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691300543] [2021-05-06 05:11:02,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:11:02,909 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:11:02,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1925001201] [2021-05-06 05:11:02,910 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:11:03,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 05:11:03,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 05:11:03,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 05:11:03,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:11:03,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:03,070 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 05:11:03,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:11:03,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691300543] [2021-05-06 05:11:03,071 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:11:03,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925001201] [2021-05-06 05:11:03,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925001201] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:11:03,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 05:11:03,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 05:11:03,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071405636] [2021-05-06 05:11:03,071 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 05:11:03,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:11:03,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 05:11:03,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 05:11:03,072 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 05:11:03,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:11:03,134 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2021-05-06 05:11:03,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 05:11:03,134 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 35 [2021-05-06 05:11:03,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:11:03,135 INFO L225 Difference]: With dead ends: 58 [2021-05-06 05:11:03,135 INFO L226 Difference]: Without dead ends: 56 [2021-05-06 05:11:03,135 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.3ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 05:11:03,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-06 05:11:03,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2021-05-06 05:11:03,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 33 states have internal predecessors, (35), 16 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-06 05:11:03,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2021-05-06 05:11:03,140 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 35 [2021-05-06 05:11:03,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:11:03,140 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2021-05-06 05:11:03,140 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 05:11:03,140 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2021-05-06 05:11:03,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-06 05:11:03,141 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:11:03,141 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:11:03,357 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:11:03,357 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:11:03,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:11:03,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1183106562, now seen corresponding path program 3 times [2021-05-06 05:11:03,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:11:03,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784224078] [2021-05-06 05:11:03,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:11:03,362 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:11:03,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1358539526] [2021-05-06 05:11:03,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:11:03,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-06 05:11:03,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 05:11:03,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 05:11:03,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:11:03,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:03,533 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-06 05:11:03,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:11:03,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784224078] [2021-05-06 05:11:03,534 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:11:03,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358539526] [2021-05-06 05:11:03,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358539526] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:11:03,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 05:11:03,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 05:11:03,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034173468] [2021-05-06 05:11:03,534 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 05:11:03,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:11:03,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 05:11:03,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 05:11:03,535 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 05:11:03,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:11:03,595 INFO L93 Difference]: Finished difference Result 62 states and 71 transitions. [2021-05-06 05:11:03,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 05:11:03,595 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 40 [2021-05-06 05:11:03,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:11:03,596 INFO L225 Difference]: With dead ends: 62 [2021-05-06 05:11:03,596 INFO L226 Difference]: Without dead ends: 57 [2021-05-06 05:11:03,596 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.9ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 05:11:03,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-05-06 05:11:03,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-05-06 05:11:03,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 34 states have (on average 1.088235294117647) internal successors, (37), 35 states have internal predecessors, (37), 14 states have call successors, (14), 9 states have call predecessors, (14), 8 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 05:11:03,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 63 transitions. [2021-05-06 05:11:03,601 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 63 transitions. Word has length 40 [2021-05-06 05:11:03,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:11:03,601 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 63 transitions. [2021-05-06 05:11:03,601 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 05:11:03,601 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 63 transitions. [2021-05-06 05:11:03,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-06 05:11:03,602 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:11:03,602 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:11:03,804 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:11:03,805 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:11:03,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:11:03,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1332643880, now seen corresponding path program 2 times [2021-05-06 05:11:03,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:11:03,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491147253] [2021-05-06 05:11:03,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:11:03,811 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:11:03,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1570894096] [2021-05-06 05:11:03,812 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 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 05:11:03,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 05:11:03,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 05:11:03,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 05:11:03,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:11:03,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:03,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:03,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:03,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:03,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:03,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:03,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:03,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:03,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:03,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:03,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:03,961 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 12 proven. 46 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 05:11:03,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:11:03,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491147253] [2021-05-06 05:11:03,962 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:11:03,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570894096] [2021-05-06 05:11:03,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570894096] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:11:03,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 05:11:03,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 05:11:03,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925186635] [2021-05-06 05:11:03,964 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 05:11:03,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:11:03,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 05:11:03,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 05:11:03,965 INFO L87 Difference]: Start difference. First operand 57 states and 63 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 05:11:04,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:11:04,016 INFO L93 Difference]: Finished difference Result 68 states and 76 transitions. [2021-05-06 05:11:04,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 05:11:04,016 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 48 [2021-05-06 05:11:04,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:11:04,017 INFO L225 Difference]: With dead ends: 68 [2021-05-06 05:11:04,017 INFO L226 Difference]: Without dead ends: 59 [2021-05-06 05:11:04,017 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 18.6ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-06 05:11:04,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-05-06 05:11:04,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-05-06 05:11:04,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 37 states have internal predecessors, (39), 14 states have call successors, (14), 9 states have call predecessors, (14), 8 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 05:11:04,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 65 transitions. [2021-05-06 05:11:04,034 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 65 transitions. Word has length 48 [2021-05-06 05:11:04,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:11:04,035 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 65 transitions. [2021-05-06 05:11:04,035 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 05:11:04,035 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 65 transitions. [2021-05-06 05:11:04,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-06 05:11:04,038 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:11:04,038 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:11:04,243 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-06 05:11:04,243 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:11:04,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:11:04,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1330975584, now seen corresponding path program 4 times [2021-05-06 05:11:04,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:11:04,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112357291] [2021-05-06 05:11:04,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:11:04,249 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:11:04,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2051686042] [2021-05-06 05:11:04,249 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 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 05:11:04,296 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 05:11:04,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 05:11:04,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 05:11:04,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:11:04,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:04,381 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 29 proven. 7 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-05-06 05:11:04,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:11:04,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112357291] [2021-05-06 05:11:04,381 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:11:04,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051686042] [2021-05-06 05:11:04,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051686042] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:11:04,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 05:11:04,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 05:11:04,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786427405] [2021-05-06 05:11:04,382 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 05:11:04,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:11:04,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 05:11:04,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-06 05:11:04,382 INFO L87 Difference]: Start difference. First operand 59 states and 65 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 05:11:04,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:11:04,428 INFO L93 Difference]: Finished difference Result 65 states and 70 transitions. [2021-05-06 05:11:04,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 05:11:04,429 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 48 [2021-05-06 05:11:04,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:11:04,429 INFO L225 Difference]: With dead ends: 65 [2021-05-06 05:11:04,429 INFO L226 Difference]: Without dead ends: 63 [2021-05-06 05:11:04,430 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 26.3ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-06 05:11:04,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-05-06 05:11:04,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-05-06 05:11:04,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 40 states have internal predecessors, (42), 14 states have call successors, (14), 10 states have call predecessors, (14), 9 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 05:11:04,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 68 transitions. [2021-05-06 05:11:04,437 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 68 transitions. Word has length 48 [2021-05-06 05:11:04,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:11:04,437 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 68 transitions. [2021-05-06 05:11:04,437 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 05:11:04,437 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 68 transitions. [2021-05-06 05:11:04,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-05-06 05:11:04,438 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:11:04,438 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:11:04,638 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-06 05:11:04,638 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:11:04,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:11:04,639 INFO L82 PathProgramCache]: Analyzing trace with hash 107606955, now seen corresponding path program 5 times [2021-05-06 05:11:04,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:11:04,639 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541636146] [2021-05-06 05:11:04,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:11:04,644 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:11:04,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [847925007] [2021-05-06 05:11:04,644 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 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 05:11:04,703 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-06 05:11:04,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 05:11:04,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-06 05:11:04,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:11:04,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:04,823 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 14 proven. 14 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-05-06 05:11:04,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:11:04,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541636146] [2021-05-06 05:11:04,823 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:11:04,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847925007] [2021-05-06 05:11:04,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847925007] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:11:04,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 05:11:04,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 05:11:04,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220158998] [2021-05-06 05:11:04,824 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 05:11:04,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:11:04,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 05:11:04,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 05:11:04,825 INFO L87 Difference]: Start difference. First operand 63 states and 68 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-06 05:11:04,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:11:04,905 INFO L93 Difference]: Finished difference Result 76 states and 86 transitions. [2021-05-06 05:11:04,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 05:11:04,905 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 53 [2021-05-06 05:11:04,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:11:04,906 INFO L225 Difference]: With dead ends: 76 [2021-05-06 05:11:04,906 INFO L226 Difference]: Without dead ends: 74 [2021-05-06 05:11:04,906 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.0ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 05:11:04,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-05-06 05:11:04,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2021-05-06 05:11:04,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 45 states have internal predecessors, (47), 19 states have call successors, (19), 11 states have call predecessors, (19), 10 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 05:11:04,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 83 transitions. [2021-05-06 05:11:04,920 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 83 transitions. Word has length 53 [2021-05-06 05:11:04,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:11:04,921 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 83 transitions. [2021-05-06 05:11:04,921 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-06 05:11:04,921 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 83 transitions. [2021-05-06 05:11:04,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-06 05:11:04,923 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:11:04,923 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:11:05,136 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:11:05,137 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:11:05,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:11:05,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1960424256, now seen corresponding path program 6 times [2021-05-06 05:11:05,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:11:05,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141158486] [2021-05-06 05:11:05,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:11:05,142 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:11:05,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1994434760] [2021-05-06 05:11:05,142 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 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 05:11:05,250 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-06 05:11:05,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 05:11:05,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-06 05:11:05,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:11:05,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:05,406 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 27 proven. 26 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-05-06 05:11:05,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:11:05,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141158486] [2021-05-06 05:11:05,406 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:11:05,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994434760] [2021-05-06 05:11:05,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994434760] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:11:05,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 05:11:05,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 05:11:05,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041627719] [2021-05-06 05:11:05,407 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 05:11:05,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:11:05,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 05:11:05,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 05:11:05,408 INFO L87 Difference]: Start difference. First operand 73 states and 83 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-06 05:11:05,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:11:05,532 INFO L93 Difference]: Finished difference Result 80 states and 89 transitions. [2021-05-06 05:11:05,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 05:11:05,533 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 58 [2021-05-06 05:11:05,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:11:05,535 INFO L225 Difference]: With dead ends: 80 [2021-05-06 05:11:05,535 INFO L226 Difference]: Without dead ends: 75 [2021-05-06 05:11:05,536 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 65.0ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-06 05:11:05,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-05-06 05:11:05,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-05-06 05:11:05,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 46 states have (on average 1.065217391304348) internal successors, (49), 47 states have internal predecessors, (49), 17 states have call successors, (17), 12 states have call predecessors, (17), 11 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 05:11:05,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 81 transitions. [2021-05-06 05:11:05,546 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 81 transitions. Word has length 58 [2021-05-06 05:11:05,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:11:05,547 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 81 transitions. [2021-05-06 05:11:05,547 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-06 05:11:05,547 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 81 transitions. [2021-05-06 05:11:05,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-05-06 05:11:05,548 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:11:05,548 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:11:05,752 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:11:05,753 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:11:05,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:11:05,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1498675765, now seen corresponding path program 1 times [2021-05-06 05:11:05,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:11:05,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570553482] [2021-05-06 05:11:05,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:11:05,758 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:11:05,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1391765182] [2021-05-06 05:11:05,758 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 05:11:05,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:11:05,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 05:11:05,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:11:05,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:05,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:05,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:05,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:05,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:05,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:05,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:05,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:05,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:05,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:05,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:05,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:05,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:05,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:05,949 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 54 proven. 132 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-05-06 05:11:05,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:11:05,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570553482] [2021-05-06 05:11:05,950 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:11:05,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391765182] [2021-05-06 05:11:05,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391765182] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:11:05,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 05:11:05,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 05:11:05,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983116339] [2021-05-06 05:11:05,952 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 05:11:05,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:11:05,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 05:11:05,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 05:11:05,952 INFO L87 Difference]: Start difference. First operand 75 states and 81 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 6 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-06 05:11:06,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:11:06,004 INFO L93 Difference]: Finished difference Result 94 states and 100 transitions. [2021-05-06 05:11:06,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 05:11:06,005 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 6 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 71 [2021-05-06 05:11:06,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:11:06,005 INFO L225 Difference]: With dead ends: 94 [2021-05-06 05:11:06,005 INFO L226 Difference]: Without dead ends: 81 [2021-05-06 05:11:06,006 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 25.0ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-06 05:11:06,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-05-06 05:11:06,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-05-06 05:11:06,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 52 states have internal predecessors, (54), 17 states have call successors, (17), 13 states have call predecessors, (17), 12 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 05:11:06,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 86 transitions. [2021-05-06 05:11:06,010 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 86 transitions. Word has length 71 [2021-05-06 05:11:06,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:11:06,010 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 86 transitions. [2021-05-06 05:11:06,010 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 6 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-06 05:11:06,011 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 86 transitions. [2021-05-06 05:11:06,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-05-06 05:11:06,011 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:11:06,011 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:11:06,213 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-06 05:11:06,213 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:11:06,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:11:06,214 INFO L82 PathProgramCache]: Analyzing trace with hash -940246227, now seen corresponding path program 7 times [2021-05-06 05:11:06,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:11:06,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956288393] [2021-05-06 05:11:06,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:11:06,219 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:11:06,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [705065696] [2021-05-06 05:11:06,219 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 05:11:06,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:11:06,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-06 05:11:06,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:11:06,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:06,422 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 20 proven. 30 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-05-06 05:11:06,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:11:06,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956288393] [2021-05-06 05:11:06,422 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:11:06,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705065696] [2021-05-06 05:11:06,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705065696] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:11:06,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 05:11:06,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 05:11:06,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630408769] [2021-05-06 05:11:06,423 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 05:11:06,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:11:06,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 05:11:06,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 05:11:06,423 INFO L87 Difference]: Start difference. First operand 81 states and 86 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-06 05:11:06,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:11:06,512 INFO L93 Difference]: Finished difference Result 94 states and 104 transitions. [2021-05-06 05:11:06,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 05:11:06,512 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 71 [2021-05-06 05:11:06,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:11:06,513 INFO L225 Difference]: With dead ends: 94 [2021-05-06 05:11:06,513 INFO L226 Difference]: Without dead ends: 92 [2021-05-06 05:11:06,513 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.3ms TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 05:11:06,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-05-06 05:11:06,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2021-05-06 05:11:06,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 57 states have internal predecessors, (59), 22 states have call successors, (22), 14 states have call predecessors, (22), 13 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-06 05:11:06,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 101 transitions. [2021-05-06 05:11:06,518 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 101 transitions. Word has length 71 [2021-05-06 05:11:06,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:11:06,518 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 101 transitions. [2021-05-06 05:11:06,518 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-06 05:11:06,518 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 101 transitions. [2021-05-06 05:11:06,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-05-06 05:11:06,519 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:11:06,519 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:11:06,736 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-06 05:11:06,736 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:11:06,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:11:06,736 INFO L82 PathProgramCache]: Analyzing trace with hash -1041167106, now seen corresponding path program 8 times [2021-05-06 05:11:06,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:11:06,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344608653] [2021-05-06 05:11:06,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:11:06,741 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:11:06,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [680255451] [2021-05-06 05:11:06,742 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 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 05:11:06,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 05:11:06,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 05:11:06,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-06 05:11:06,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:11:06,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:06,952 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 22 proven. 33 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2021-05-06 05:11:06,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:11:06,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344608653] [2021-05-06 05:11:06,952 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:11:06,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680255451] [2021-05-06 05:11:06,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680255451] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:11:06,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 05:11:06,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 05:11:06,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938879861] [2021-05-06 05:11:06,953 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 05:11:06,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:11:06,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 05:11:06,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 05:11:06,953 INFO L87 Difference]: Start difference. First operand 91 states and 101 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-06 05:11:07,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:11:07,044 INFO L93 Difference]: Finished difference Result 98 states and 107 transitions. [2021-05-06 05:11:07,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 05:11:07,044 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 76 [2021-05-06 05:11:07,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:11:07,045 INFO L225 Difference]: With dead ends: 98 [2021-05-06 05:11:07,045 INFO L226 Difference]: Without dead ends: 93 [2021-05-06 05:11:07,045 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.6ms TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 05:11:07,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-05-06 05:11:07,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2021-05-06 05:11:07,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 58 states have (on average 1.0517241379310345) internal successors, (61), 59 states have internal predecessors, (61), 20 states have call successors, (20), 15 states have call predecessors, (20), 14 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-06 05:11:07,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 99 transitions. [2021-05-06 05:11:07,050 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 99 transitions. Word has length 76 [2021-05-06 05:11:07,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:11:07,050 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 99 transitions. [2021-05-06 05:11:07,050 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-06 05:11:07,050 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 99 transitions. [2021-05-06 05:11:07,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-06 05:11:07,051 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:11:07,051 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:11:07,270 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-06 05:11:07,270 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:11:07,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:11:07,270 INFO L82 PathProgramCache]: Analyzing trace with hash 122742071, now seen corresponding path program 2 times [2021-05-06 05:11:07,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:11:07,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837437716] [2021-05-06 05:11:07,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:11:07,275 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:11:07,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [72916492] [2021-05-06 05:11:07,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:11:07,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 05:11:07,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 05:11:07,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 05:11:07,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:11:07,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:07,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:07,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:07,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:07,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:07,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:07,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:07,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:07,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:07,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:07,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:07,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:07,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:07,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:07,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:07,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:07,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:07,483 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 72 proven. 260 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-05-06 05:11:07,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:11:07,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837437716] [2021-05-06 05:11:07,483 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:11:07,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72916492] [2021-05-06 05:11:07,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72916492] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:11:07,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 05:11:07,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 05:11:07,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197633304] [2021-05-06 05:11:07,484 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 05:11:07,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:11:07,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 05:11:07,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 05:11:07,484 INFO L87 Difference]: Start difference. First operand 93 states and 99 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 7 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2021-05-06 05:11:07,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:11:07,559 INFO L93 Difference]: Finished difference Result 112 states and 118 transitions. [2021-05-06 05:11:07,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 05:11:07,559 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), 7 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) Word has length 89 [2021-05-06 05:11:07,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:11:07,560 INFO L225 Difference]: With dead ends: 112 [2021-05-06 05:11:07,560 INFO L226 Difference]: Without dead ends: 99 [2021-05-06 05:11:07,561 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 41.2ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-05-06 05:11:07,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-05-06 05:11:07,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2021-05-06 05:11:07,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 63 states have (on average 1.0476190476190477) internal successors, (66), 64 states have internal predecessors, (66), 20 states have call successors, (20), 16 states have call predecessors, (20), 15 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-06 05:11:07,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 104 transitions. [2021-05-06 05:11:07,568 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 104 transitions. Word has length 89 [2021-05-06 05:11:07,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:11:07,568 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 104 transitions. [2021-05-06 05:11:07,568 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), 7 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2021-05-06 05:11:07,568 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 104 transitions. [2021-05-06 05:11:07,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-06 05:11:07,569 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:11:07,569 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:11:07,788 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:11:07,789 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:11:07,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:11:07,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1978787375, now seen corresponding path program 9 times [2021-05-06 05:11:07,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:11:07,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687056159] [2021-05-06 05:11:07,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:11:07,794 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:11:07,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1461421252] [2021-05-06 05:11:07,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:11:07,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 05:11:07,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 05:11:07,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 05:11:07,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:11:08,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:08,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:08,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:08,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:08,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:08,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:08,044 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 109 proven. 2 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2021-05-06 05:11:08,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:11:08,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687056159] [2021-05-06 05:11:08,044 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:11:08,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461421252] [2021-05-06 05:11:08,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461421252] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:11:08,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 05:11:08,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 05:11:08,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226690719] [2021-05-06 05:11:08,045 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 05:11:08,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:11:08,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 05:11:08,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 05:11:08,045 INFO L87 Difference]: Start difference. First operand 99 states and 104 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-06 05:11:08,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:11:08,133 INFO L93 Difference]: Finished difference Result 100 states and 106 transitions. [2021-05-06 05:11:08,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 05:11:08,134 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 89 [2021-05-06 05:11:08,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:11:08,135 INFO L225 Difference]: With dead ends: 100 [2021-05-06 05:11:08,135 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 05:11:08,136 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 60.2ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-06 05:11:08,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 05:11:08,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 05:11:08,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-06 05:11:08,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 05:11:08,136 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 89 [2021-05-06 05:11:08,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:11:08,136 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 05:11:08,136 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-06 05:11:08,136 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 05:11:08,136 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 05:11:08,340 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-06 05:11:08,342 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-06 05:11:08,744 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 5) no Hoare annotation was computed. [2021-05-06 05:11:08,744 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 5) no Hoare annotation was computed. [2021-05-06 05:11:08,744 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 5) no Hoare annotation was computed. [2021-05-06 05:11:08,744 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-06 05:11:08,744 INFO L194 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= ~counter~0 |old(~counter~0)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-05-06 05:11:08,744 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-06 05:11:08,744 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-06 05:11:08,744 INFO L194 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: (= ~counter~0 0) [2021-05-06 05:11:08,744 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-06 05:11:08,744 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-06 05:11:08,744 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notENTRY(lines 8 10) no Hoare annotation was computed. [2021-05-06 05:11:08,744 INFO L198 CegarLoopUtils]: For program point L9(line 9) no Hoare annotation was computed. [2021-05-06 05:11:08,745 INFO L198 CegarLoopUtils]: For program point L9-2(lines 8 10) no Hoare annotation was computed. [2021-05-06 05:11:08,745 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 8 10) no Hoare annotation was computed. [2021-05-06 05:11:08,745 INFO L198 CegarLoopUtils]: For program point L33(lines 30 42) no Hoare annotation was computed. [2021-05-06 05:11:08,745 INFO L194 CegarLoopUtils]: At program point L31(line 31) the Hoare annotation is: (or (and (= (* main_~s~0 4) (+ (* main_~t~0 main_~t~0) (* main_~t~0 2) 1)) (= (+ (* main_~a~0 2) 1) main_~t~0)) (not (= |old(~counter~0)| 0))) [2021-05-06 05:11:08,745 INFO L194 CegarLoopUtils]: At program point L31-1(line 31) the Hoare annotation is: (or (and (= (* main_~s~0 4) (+ (* main_~t~0 main_~t~0) (* main_~t~0 2) 1)) (= (+ (* main_~a~0 2) 1) main_~t~0)) (not (= |old(~counter~0)| 0))) [2021-05-06 05:11:08,745 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 21 49) no Hoare annotation was computed. [2021-05-06 05:11:08,745 INFO L198 CegarLoopUtils]: For program point L46(line 46) no Hoare annotation was computed. [2021-05-06 05:11:08,745 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 21 49) no Hoare annotation was computed. [2021-05-06 05:11:08,745 INFO L194 CegarLoopUtils]: At program point L44(line 44) the Hoare annotation is: (or (and (= (* main_~s~0 4) (+ (* main_~a~0 8) (* (* main_~a~0 main_~a~0) 4) 4)) (= (+ (* main_~a~0 2) 1) main_~t~0)) (not (= |old(~counter~0)| 0))) [2021-05-06 05:11:08,745 INFO L194 CegarLoopUtils]: At program point L32(line 32) the Hoare annotation is: (or (and (= (* main_~s~0 4) (+ (* main_~t~0 main_~t~0) (* main_~t~0 2) 1)) (= (+ (* main_~a~0 2) 1) main_~t~0)) (not (= |old(~counter~0)| 0))) [2021-05-06 05:11:08,745 INFO L194 CegarLoopUtils]: At program point mainENTRY(lines 21 49) the Hoare annotation is: (or (= ~counter~0 |old(~counter~0)|) (not (= |old(~counter~0)| 0))) [2021-05-06 05:11:08,745 INFO L198 CegarLoopUtils]: For program point L30-1(lines 30 42) no Hoare annotation was computed. [2021-05-06 05:11:08,745 INFO L194 CegarLoopUtils]: At program point L30-3(lines 30 42) the Hoare annotation is: (or (and (= (* main_~s~0 4) (+ (* main_~t~0 main_~t~0) (* main_~t~0 2) 1)) (= (+ (* main_~a~0 2) 1) main_~t~0)) (not (= |old(~counter~0)| 0))) [2021-05-06 05:11:08,745 INFO L194 CegarLoopUtils]: At program point L30-4(lines 30 42) the Hoare annotation is: (or (and (= (* main_~s~0 4) (+ (* main_~t~0 main_~t~0) (* main_~t~0 2) 1)) (= (+ (* main_~a~0 2) 1) main_~t~0)) (not (= |old(~counter~0)| 0))) [2021-05-06 05:11:08,745 INFO L194 CegarLoopUtils]: At program point L45(line 45) the Hoare annotation is: (or (and (= (* main_~s~0 4) (+ (* main_~t~0 main_~t~0) (* main_~t~0 2) 1)) (= (+ (* main_~a~0 2) 1) main_~t~0)) (and (= main_~t~0 1) (= main_~s~0 1)) (not (= |old(~counter~0)| 0)) (and (= main_~t~0 3) (= main_~s~0 (+ main_~t~0 1)))) [2021-05-06 05:11:08,745 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 11 17) the Hoare annotation is: true [2021-05-06 05:11:08,746 INFO L198 CegarLoopUtils]: For program point L13(lines 13 14) no Hoare annotation was computed. [2021-05-06 05:11:08,746 INFO L198 CegarLoopUtils]: For program point L12(lines 12 15) no Hoare annotation was computed. [2021-05-06 05:11:08,746 INFO L198 CegarLoopUtils]: For program point L12-2(lines 11 17) no Hoare annotation was computed. [2021-05-06 05:11:08,746 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 11 17) no Hoare annotation was computed. [2021-05-06 05:11:08,746 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2021-05-06 05:11:08,755 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 05:11:08 BoogieIcfgContainer [2021-05-06 05:11:08,755 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 05:11:08,756 INFO L168 Benchmark]: Toolchain (without parser) took 9078.60 ms. Allocated memory was 210.8 MB in the beginning and 253.8 MB in the end (delta: 43.0 MB). Free memory was 175.6 MB in the beginning and 185.1 MB in the end (delta: -9.6 MB). Peak memory consumption was 131.5 MB. Max. memory is 8.0 GB. [2021-05-06 05:11:08,756 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 210.8 MB. Free memory was 192.4 MB in the beginning and 192.3 MB in the end (delta: 89.1 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 05:11:08,756 INFO L168 Benchmark]: CACSL2BoogieTranslator took 169.20 ms. Allocated memory is still 210.8 MB. Free memory was 175.3 MB in the beginning and 165.6 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-06 05:11:08,756 INFO L168 Benchmark]: Boogie Preprocessor took 68.40 ms. Allocated memory is still 210.8 MB. Free memory was 165.6 MB in the beginning and 193.3 MB in the end (delta: -27.7 MB). Peak memory consumption was 3.2 MB. Max. memory is 8.0 GB. [2021-05-06 05:11:08,756 INFO L168 Benchmark]: RCFGBuilder took 322.68 ms. Allocated memory is still 210.8 MB. Free memory was 193.3 MB in the beginning and 178.1 MB in the end (delta: 15.2 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-06 05:11:08,756 INFO L168 Benchmark]: TraceAbstraction took 8507.88 ms. Allocated memory was 210.8 MB in the beginning and 253.8 MB in the end (delta: 43.0 MB). Free memory was 177.6 MB in the beginning and 185.1 MB in the end (delta: -7.6 MB). Peak memory consumption was 133.5 MB. Max. memory is 8.0 GB. [2021-05-06 05:11:08,756 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 210.8 MB. Free memory was 192.4 MB in the beginning and 192.3 MB in the end (delta: 89.1 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 169.20 ms. Allocated memory is still 210.8 MB. Free memory was 175.3 MB in the beginning and 165.6 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 68.40 ms. Allocated memory is still 210.8 MB. Free memory was 165.6 MB in the beginning and 193.3 MB in the end (delta: -27.7 MB). Peak memory consumption was 3.2 MB. Max. memory is 8.0 GB. * RCFGBuilder took 322.68 ms. Allocated memory is still 210.8 MB. Free memory was 193.3 MB in the beginning and 178.1 MB in the end (delta: 15.2 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 8507.88 ms. Allocated memory was 210.8 MB in the beginning and 253.8 MB in the end (delta: 43.0 MB). Free memory was 177.6 MB in the beginning and 185.1 MB in the end (delta: -7.6 MB). Peak memory consumption was 133.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 14]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 8043.2ms, OverallIterations: 18, TraceHistogramMax: 14, EmptinessCheckTime: 20.6ms, AutomataDifference: 1480.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 402.3ms, InitialAbstractionConstructionTime: 11.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 557 SDtfs, 128 SDslu, 1703 SDs, 0 SdLazy, 1083 SolverSat, 114 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 736.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 810 GetRequests, 699 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 689.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=99occurred in iteration=17, InterpolantAutomatonStates: 129, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 145.6ms AutomataMinimizationTime, 18 MinimizatonAttempts, 9 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 12 LocationsWithAnnotation, 63 PreInvPairs, 100 NumberOfFragments, 240 HoareAnnotationTreeSize, 63 FomulaSimplifications, 970 FormulaSimplificationTreeSizeReduction, 82.2ms HoareSimplificationTime, 12 FomulaSimplificationsInter, 645 FormulaSimplificationTreeSizeReductionInter, 309.3ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 111.8ms SsaConstructionTime, 485.6ms SatisfiabilityAnalysisTime, 1946.9ms InterpolantComputationTime, 812 NumberOfCodeBlocks, 744 NumberOfCodeBlocksAsserted, 33 NumberOfCheckSat, 794 ConstructedInterpolants, 0 QuantifiedInterpolants, 2528 SizeOfPredicates, 36 NumberOfNonLiveVariables, 2668 ConjunctsInSsa, 219 ConjunctsInUnsatCore, 18 InterpolantComputations, 5 PerfectInterpolantSequences, 1501/2065 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 30]: Loop Invariant Derived loop invariant: (s * 4 == t * t + t * 2 + 1 && a * 2 + 1 == t) || !(\old(counter) == 0) RESULT: Ultimate proved your program to be correct! Received shutdown request...