/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/cohencu-ll_valuebound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 01:28:34,255 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 01:28:34,257 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 01:28:34,288 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 01:28:34,306 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 01:28:34,307 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 01:28:34,308 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 01:28:34,309 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 01:28:34,311 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 01:28:34,312 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 01:28:34,313 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 01:28:34,318 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 01:28:34,320 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 01:28:34,321 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 01:28:34,322 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 01:28:34,324 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 01:28:34,329 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 01:28:34,335 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 01:28:34,335 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 01:28:34,336 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 01:28:34,339 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 01:28:34,366 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 01:28:34,366 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 01:28:34,369 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 01:28:34,369 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 01:28:34,369 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 01:28:34,369 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 01:28:34,369 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 01:28:34,369 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 01:28:34,369 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 01:28:34,369 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 01:28:34,370 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 01:28:34,370 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 01:28:34,370 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 01:28:34,370 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 01:28:34,370 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 01:28:34,370 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 01:28:34,370 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 01:28:34,371 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 01:28:34,371 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 01:28:34,371 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 01:28:34,371 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 01:28:34,371 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 01:28:34,371 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 01:28:34,371 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 01:28:34,371 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 01:28:34,371 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 01:28:34,372 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 01:28:34,372 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 01:28:34,372 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 01:28:34,631 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 01:28:34,647 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 01:28:34,649 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 01:28:34,649 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 01:28:34,650 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 01:28:34,651 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_valuebound1.c [2021-05-06 01:28:34,696 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b565c73d0/e4b843007c34487499c4d058af2c1874/FLAG67b3db4bc [2021-05-06 01:28:35,016 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 01:28:35,016 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_valuebound1.c [2021-05-06 01:28:35,023 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b565c73d0/e4b843007c34487499c4d058af2c1874/FLAG67b3db4bc [2021-05-06 01:28:35,440 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b565c73d0/e4b843007c34487499c4d058af2c1874 [2021-05-06 01:28:35,442 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 01:28:35,444 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 01:28:35,447 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 01:28:35,447 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 01:28:35,449 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 01:28:35,450 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 01:28:35" (1/1) ... [2021-05-06 01:28:35,451 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c1c3e7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:28:35, skipping insertion in model container [2021-05-06 01:28:35,452 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 01:28:35" (1/1) ... [2021-05-06 01:28:35,456 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 01:28:35,467 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 01:28:35,584 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/cohencu-ll_valuebound1.c[596,609] [2021-05-06 01:28:35,611 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 01:28:35,616 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 01:28:35,624 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/cohencu-ll_valuebound1.c[596,609] [2021-05-06 01:28:35,645 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 01:28:35,662 INFO L208 MainTranslator]: Completed translation [2021-05-06 01:28:35,663 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:28:35 WrapperNode [2021-05-06 01:28:35,663 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 01:28:35,663 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 01:28:35,664 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 01:28:35,664 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 01:28:35,727 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:28:35" (1/1) ... [2021-05-06 01:28:35,727 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:28:35" (1/1) ... [2021-05-06 01:28:35,733 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:28:35" (1/1) ... [2021-05-06 01:28:35,733 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:28:35" (1/1) ... [2021-05-06 01:28:35,736 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:28:35" (1/1) ... [2021-05-06 01:28:35,738 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:28:35" (1/1) ... [2021-05-06 01:28:35,739 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:28:35" (1/1) ... [2021-05-06 01:28:35,740 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 01:28:35,740 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 01:28:35,741 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 01:28:35,744 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 01:28:35,745 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:28:35" (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 01:28:35,793 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 01:28:35,793 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 01:28:35,793 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 01:28:35,793 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 01:28:35,793 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 01:28:35,794 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 01:28:35,794 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 01:28:35,794 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 01:28:35,794 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 01:28:35,794 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 01:28:35,795 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_short [2021-05-06 01:28:35,795 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 01:28:35,795 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 01:28:35,795 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 01:28:35,796 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 01:28:35,796 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 01:28:35,796 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 01:28:35,796 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 01:28:35,796 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 01:28:35,796 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 01:28:35,998 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 01:28:35,999 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 01:28:36,000 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 01:28:35 BoogieIcfgContainer [2021-05-06 01:28:36,000 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 01:28:36,001 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 01:28:36,001 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 01:28:36,002 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 01:28:36,003 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 01:28:35" (1/3) ... [2021-05-06 01:28:36,003 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33e425d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 01:28:36, skipping insertion in model container [2021-05-06 01:28:36,003 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 01:28:35" (2/3) ... [2021-05-06 01:28:36,003 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33e425d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 01:28:36, skipping insertion in model container [2021-05-06 01:28:36,003 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 01:28:35" (3/3) ... [2021-05-06 01:28:36,004 INFO L111 eAbstractionObserver]: Analyzing ICFG cohencu-ll_valuebound1.c [2021-05-06 01:28:36,008 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 01:28:36,010 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 01:28:36,021 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 01:28:36,043 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 01:28:36,044 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 01:28:36,044 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 01:28:36,044 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 01:28:36,044 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 01:28:36,044 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 01:28:36,044 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 01:28:36,044 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 01:28:36,077 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-06 01:28:36,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 01:28:36,080 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 01:28:36,081 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 01:28:36,081 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 01:28:36,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 01:28:36,086 INFO L82 PathProgramCache]: Analyzing trace with hash 503189915, now seen corresponding path program 1 times [2021-05-06 01:28:36,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 01:28:36,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790961032] [2021-05-06 01:28:36,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 01:28:36,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:28:36,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 01:28:36,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:28:36,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 01:28:36,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:28:36,370 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 01:28:36,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 01:28:36,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790961032] [2021-05-06 01:28:36,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790961032] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 01:28:36,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 01:28:36,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 01:28:36,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171516801] [2021-05-06 01:28:36,375 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 01:28:36,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 01:28:36,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 01:28:36,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 01:28:36,385 INFO L87 Difference]: Start difference. First operand has 36 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 01:28:36,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 01:28:36,542 INFO L93 Difference]: Finished difference Result 63 states and 101 transitions. [2021-05-06 01:28:36,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 01:28:36,547 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-06 01:28:36,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 01:28:36,552 INFO L225 Difference]: With dead ends: 63 [2021-05-06 01:28:36,552 INFO L226 Difference]: Without dead ends: 31 [2021-05-06 01:28:36,554 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 01:28:36,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-05-06 01:28:36,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-05-06 01:28:36,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 01:28:36,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 41 transitions. [2021-05-06 01:28:36,604 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 41 transitions. Word has length 17 [2021-05-06 01:28:36,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 01:28:36,605 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 41 transitions. [2021-05-06 01:28:36,605 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 01:28:36,605 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 41 transitions. [2021-05-06 01:28:36,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 01:28:36,605 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 01:28:36,605 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 01:28:36,606 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 01:28:36,606 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 01:28:36,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 01:28:36,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1171868123, now seen corresponding path program 1 times [2021-05-06 01:28:36,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 01:28:36,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592687638] [2021-05-06 01:28:36,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 01:28:36,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:28:36,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 01:28:36,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:28:36,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 01:28:36,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:28:36,723 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 01:28:36,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 01:28:36,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592687638] [2021-05-06 01:28:36,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592687638] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 01:28:36,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 01:28:36,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 01:28:36,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043388017] [2021-05-06 01:28:36,725 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 01:28:36,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 01:28:36,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 01:28:36,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 01:28:36,726 INFO L87 Difference]: Start difference. First operand 31 states and 41 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 01:28:36,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 01:28:36,947 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2021-05-06 01:28:36,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 01:28:36,947 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-06 01:28:36,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 01:28:36,948 INFO L225 Difference]: With dead ends: 37 [2021-05-06 01:28:36,948 INFO L226 Difference]: Without dead ends: 35 [2021-05-06 01:28:36,949 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 110.3ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 01:28:36,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-06 01:28:36,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-06 01:28:36,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 16 states have (on average 1.125) internal successors, (18), 17 states have internal predecessors, (18), 14 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 01:28:36,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2021-05-06 01:28:36,956 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 17 [2021-05-06 01:28:36,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 01:28:36,956 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2021-05-06 01:28:36,956 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 01:28:36,956 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2021-05-06 01:28:36,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 01:28:36,957 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 01:28:36,957 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 01:28:36,957 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 01:28:36,957 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 01:28:36,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 01:28:36,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1781524074, now seen corresponding path program 1 times [2021-05-06 01:28:36,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 01:28:36,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782400165] [2021-05-06 01:28:36,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 01:28:36,966 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 01:28:36,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [378373193] [2021-05-06 01:28:36,970 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 01:28:37,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:28:37,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 01:28:37,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 01:28:37,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:37,090 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 01:28:37,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 01:28:37,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782400165] [2021-05-06 01:28:37,090 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 01:28:37,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378373193] [2021-05-06 01:28:37,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378373193] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 01:28:37,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 01:28:37,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 01:28:37,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590056965] [2021-05-06 01:28:37,091 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 01:28:37,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 01:28:37,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 01:28:37,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 01:28:37,092 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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 01:28:37,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 01:28:37,144 INFO L93 Difference]: Finished difference Result 54 states and 73 transitions. [2021-05-06 01:28:37,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 01:28:37,144 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), 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 01:28:37,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 01:28:37,145 INFO L225 Difference]: With dead ends: 54 [2021-05-06 01:28:37,145 INFO L226 Difference]: Without dead ends: 52 [2021-05-06 01:28:37,158 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.6ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 01:28:37,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-06 01:28:37,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 42. [2021-05-06 01:28:37,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 20 states have (on average 1.1) internal successors, (22), 22 states have internal predecessors, (22), 16 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-06 01:28:37,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 52 transitions. [2021-05-06 01:28:37,169 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 52 transitions. Word has length 22 [2021-05-06 01:28:37,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 01:28:37,170 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 52 transitions. [2021-05-06 01:28:37,170 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), 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 01:28:37,170 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 52 transitions. [2021-05-06 01:28:37,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-06 01:28:37,170 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 01:28:37,170 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 01:28:37,381 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-06 01:28:37,381 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 01:28:37,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 01:28:37,382 INFO L82 PathProgramCache]: Analyzing trace with hash 1241120379, now seen corresponding path program 1 times [2021-05-06 01:28:37,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 01:28:37,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510793174] [2021-05-06 01:28:37,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 01:28:37,389 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 01:28:37,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [571339347] [2021-05-06 01:28:37,389 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 01:28:37,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:28:37,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 01:28:37,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 01:28:37,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:37,539 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 01:28:37,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 01:28:37,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510793174] [2021-05-06 01:28:37,539 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 01:28:37,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571339347] [2021-05-06 01:28:37,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571339347] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 01:28:37,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 01:28:37,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 01:28:37,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497512387] [2021-05-06 01:28:37,540 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 01:28:37,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 01:28:37,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 01:28:37,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 01:28:37,540 INFO L87 Difference]: Start difference. First operand 42 states and 52 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 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 01:28:37,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 01:28:37,581 INFO L93 Difference]: Finished difference Result 58 states and 76 transitions. [2021-05-06 01:28:37,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 01:28:37,581 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), 2 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 27 [2021-05-06 01:28:37,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 01:28:37,582 INFO L225 Difference]: With dead ends: 58 [2021-05-06 01:28:37,582 INFO L226 Difference]: Without dead ends: 56 [2021-05-06 01:28:37,582 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.0ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 01:28:37,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-06 01:28:37,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 52. [2021-05-06 01:28:37,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 24 states have (on average 1.125) internal successors, (27), 26 states have internal predecessors, (27), 21 states have call successors, (21), 7 states have call predecessors, (21), 6 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-06 01:28:37,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 67 transitions. [2021-05-06 01:28:37,591 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 67 transitions. Word has length 27 [2021-05-06 01:28:37,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 01:28:37,591 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 67 transitions. [2021-05-06 01:28:37,591 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), 2 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 01:28:37,591 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 67 transitions. [2021-05-06 01:28:37,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-06 01:28:37,592 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 01:28:37,592 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 01:28:37,810 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 01:28:37,811 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 01:28:37,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 01:28:37,811 INFO L82 PathProgramCache]: Analyzing trace with hash 1598126198, now seen corresponding path program 1 times [2021-05-06 01:28:37,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 01:28:37,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633604363] [2021-05-06 01:28:37,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 01:28:37,819 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 01:28:37,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [579814407] [2021-05-06 01:28:37,819 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 01:28:37,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:28:37,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 01:28:37,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 01:28:37,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:37,957 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 01:28:37,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 01:28:37,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633604363] [2021-05-06 01:28:37,957 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 01:28:37,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579814407] [2021-05-06 01:28:37,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579814407] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 01:28:37,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 01:28:37,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 01:28:37,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737604485] [2021-05-06 01:28:37,958 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 01:28:37,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 01:28:37,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 01:28:37,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 01:28:37,959 INFO L87 Difference]: Start difference. First operand 52 states and 67 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 01:28:38,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 01:28:38,011 INFO L93 Difference]: Finished difference Result 66 states and 82 transitions. [2021-05-06 01:28:38,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 01:28:38,012 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), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2021-05-06 01:28:38,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 01:28:38,012 INFO L225 Difference]: With dead ends: 66 [2021-05-06 01:28:38,012 INFO L226 Difference]: Without dead ends: 54 [2021-05-06 01:28:38,013 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 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 01:28:38,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-06 01:28:38,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-05-06 01:28:38,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 28 states have internal predecessors, (29), 19 states have call successors, (19), 8 states have call predecessors, (19), 7 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 01:28:38,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2021-05-06 01:28:38,020 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 32 [2021-05-06 01:28:38,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 01:28:38,020 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2021-05-06 01:28:38,020 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), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 01:28:38,020 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2021-05-06 01:28:38,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-06 01:28:38,021 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 01:28:38,021 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 01:28:38,237 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 01:28:38,238 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 01:28:38,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 01:28:38,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1002403483, now seen corresponding path program 1 times [2021-05-06 01:28:38,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 01:28:38,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193973695] [2021-05-06 01:28:38,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 01:28:38,245 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 01:28:38,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [443076503] [2021-05-06 01:28:38,245 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 01:28:38,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:28:38,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 01:28:38,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 01:28:38,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:38,385 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-06 01:28:38,385 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 01:28:38,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193973695] [2021-05-06 01:28:38,385 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 01:28:38,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443076503] [2021-05-06 01:28:38,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443076503] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 01:28:38,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 01:28:38,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 01:28:38,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238329219] [2021-05-06 01:28:38,386 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 01:28:38,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 01:28:38,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 01:28:38,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 01:28:38,386 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 01:28:38,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 01:28:38,460 INFO L93 Difference]: Finished difference Result 81 states and 100 transitions. [2021-05-06 01:28:38,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 01:28:38,461 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 49 [2021-05-06 01:28:38,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 01:28:38,462 INFO L225 Difference]: With dead ends: 81 [2021-05-06 01:28:38,462 INFO L226 Difference]: Without dead ends: 79 [2021-05-06 01:28:38,462 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.3ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 01:28:38,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-05-06 01:28:38,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 69. [2021-05-06 01:28:38,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 37 states have (on average 1.054054054054054) internal successors, (39), 39 states have internal predecessors, (39), 21 states have call successors, (21), 11 states have call predecessors, (21), 10 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-06 01:28:38,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 79 transitions. [2021-05-06 01:28:38,470 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 79 transitions. Word has length 49 [2021-05-06 01:28:38,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 01:28:38,470 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 79 transitions. [2021-05-06 01:28:38,470 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 01:28:38,470 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 79 transitions. [2021-05-06 01:28:38,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-06 01:28:38,471 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 01:28:38,471 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 01:28:38,690 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 01:28:38,690 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 01:28:38,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 01:28:38,690 INFO L82 PathProgramCache]: Analyzing trace with hash -1130038122, now seen corresponding path program 2 times [2021-05-06 01:28:38,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 01:28:38,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117477501] [2021-05-06 01:28:38,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 01:28:38,696 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 01:28:38,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1360334059] [2021-05-06 01:28:38,697 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 01:28:38,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 01:28:38,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 01:28:38,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 01:28:38,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 01:28:38,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:38,855 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-05-06 01:28:38,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 01:28:38,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117477501] [2021-05-06 01:28:38,856 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 01:28:38,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360334059] [2021-05-06 01:28:38,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360334059] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 01:28:38,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 01:28:38,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 01:28:38,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417764039] [2021-05-06 01:28:38,856 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 01:28:38,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 01:28:38,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 01:28:38,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 01:28:38,857 INFO L87 Difference]: Start difference. First operand 69 states and 79 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 01:28:38,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 01:28:38,938 INFO L93 Difference]: Finished difference Result 85 states and 103 transitions. [2021-05-06 01:28:38,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 01:28:38,939 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 54 [2021-05-06 01:28:38,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 01:28:38,940 INFO L225 Difference]: With dead ends: 85 [2021-05-06 01:28:38,940 INFO L226 Difference]: Without dead ends: 83 [2021-05-06 01:28:38,940 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.0ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 01:28:38,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-05-06 01:28:38,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 74. [2021-05-06 01:28:38,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 40 states have (on average 1.05) internal successors, (42), 42 states have internal predecessors, (42), 22 states have call successors, (22), 12 states have call predecessors, (22), 11 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-06 01:28:38,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 84 transitions. [2021-05-06 01:28:38,949 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 84 transitions. Word has length 54 [2021-05-06 01:28:38,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 01:28:38,949 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 84 transitions. [2021-05-06 01:28:38,950 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 01:28:38,950 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 84 transitions. [2021-05-06 01:28:38,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-05-06 01:28:38,950 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 01:28:38,950 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 01:28:39,167 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-06 01:28:39,168 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 01:28:39,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 01:28:39,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1546120389, now seen corresponding path program 3 times [2021-05-06 01:28:39,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 01:28:39,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330691136] [2021-05-06 01:28:39,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 01:28:39,174 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 01:28:39,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1022913618] [2021-05-06 01:28:39,175 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 01:28:39,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-06 01:28:39,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 01:28:39,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-06 01:28:39,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 01:28:39,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:39,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:39,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:39,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:39,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:39,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:39,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:39,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:39,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:39,322 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-05-06 01:28:39,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 01:28:39,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330691136] [2021-05-06 01:28:39,323 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 01:28:39,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022913618] [2021-05-06 01:28:39,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022913618] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 01:28:39,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 01:28:39,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 01:28:39,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588678354] [2021-05-06 01:28:39,323 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 01:28:39,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 01:28:39,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 01:28:39,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 01:28:39,324 INFO L87 Difference]: Start difference. First operand 74 states and 84 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-05-06 01:28:39,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 01:28:39,394 INFO L93 Difference]: Finished difference Result 89 states and 106 transitions. [2021-05-06 01:28:39,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 01:28:39,394 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 59 [2021-05-06 01:28:39,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 01:28:39,395 INFO L225 Difference]: With dead ends: 89 [2021-05-06 01:28:39,395 INFO L226 Difference]: Without dead ends: 86 [2021-05-06 01:28:39,395 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.6ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 01:28:39,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-05-06 01:28:39,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2021-05-06 01:28:39,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 46 states have internal predecessors, (47), 29 states have call successors, (29), 13 states have call predecessors, (29), 12 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-05-06 01:28:39,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 102 transitions. [2021-05-06 01:28:39,404 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 102 transitions. Word has length 59 [2021-05-06 01:28:39,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 01:28:39,405 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 102 transitions. [2021-05-06 01:28:39,405 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-05-06 01:28:39,405 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 102 transitions. [2021-05-06 01:28:39,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-06 01:28:39,406 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 01:28:39,406 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 01:28:39,612 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 01:28:39,613 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 01:28:39,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 01:28:39,613 INFO L82 PathProgramCache]: Analyzing trace with hash -389057674, now seen corresponding path program 4 times [2021-05-06 01:28:39,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 01:28:39,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991270140] [2021-05-06 01:28:39,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 01:28:39,619 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 01:28:39,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [564389288] [2021-05-06 01:28:39,619 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 01:28:39,709 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 01:28:39,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 01:28:39,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 01:28:39,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 01:28:39,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:39,833 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-05-06 01:28:39,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 01:28:39,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991270140] [2021-05-06 01:28:39,833 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 01:28:39,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564389288] [2021-05-06 01:28:39,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564389288] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 01:28:39,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 01:28:39,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 01:28:39,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442661142] [2021-05-06 01:28:39,834 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 01:28:39,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 01:28:39,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 01:28:39,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 01:28:39,835 INFO L87 Difference]: Start difference. First operand 86 states and 102 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-06 01:28:39,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 01:28:39,895 INFO L93 Difference]: Finished difference Result 92 states and 107 transitions. [2021-05-06 01:28:39,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 01:28:39,895 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 64 [2021-05-06 01:28:39,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 01:28:39,896 INFO L225 Difference]: With dead ends: 92 [2021-05-06 01:28:39,896 INFO L226 Difference]: Without dead ends: 89 [2021-05-06 01:28:39,896 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.3ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 01:28:39,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-05-06 01:28:39,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-05-06 01:28:39,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 49 states have internal predecessors, (50), 28 states have call successors, (28), 14 states have call predecessors, (28), 13 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-06 01:28:39,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 103 transitions. [2021-05-06 01:28:39,903 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 103 transitions. Word has length 64 [2021-05-06 01:28:39,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 01:28:39,904 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 103 transitions. [2021-05-06 01:28:39,904 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-06 01:28:39,904 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 103 transitions. [2021-05-06 01:28:39,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-06 01:28:39,905 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 01:28:39,905 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 01:28:40,109 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 01:28:40,109 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 01:28:40,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 01:28:40,109 INFO L82 PathProgramCache]: Analyzing trace with hash -310331719, now seen corresponding path program 1 times [2021-05-06 01:28:40,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 01:28:40,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19085882] [2021-05-06 01:28:40,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 01:28:40,115 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 01:28:40,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [885196992] [2021-05-06 01:28:40,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 01:28:40,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:28:40,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-06 01:28:40,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 01:28:40,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:40,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:40,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:40,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:40,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:40,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:40,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:40,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:40,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:40,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:40,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:40,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:40,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:40,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:40,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:40,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:40,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:40,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:40,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:40,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:40,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:40,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:40,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:40,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:40,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:40,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:40,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:40,336 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2021-05-06 01:28:40,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 01:28:40,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19085882] [2021-05-06 01:28:40,336 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 01:28:40,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885196992] [2021-05-06 01:28:40,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885196992] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 01:28:40,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 01:28:40,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 01:28:40,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470271265] [2021-05-06 01:28:40,337 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 01:28:40,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 01:28:40,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 01:28:40,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 01:28:40,338 INFO L87 Difference]: Start difference. First operand 89 states and 103 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 01:28:40,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 01:28:40,421 INFO L93 Difference]: Finished difference Result 95 states and 108 transitions. [2021-05-06 01:28:40,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 01:28:40,422 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 75 [2021-05-06 01:28:40,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 01:28:40,423 INFO L225 Difference]: With dead ends: 95 [2021-05-06 01:28:40,423 INFO L226 Difference]: Without dead ends: 93 [2021-05-06 01:28:40,423 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 36.4ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-06 01:28:40,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-05-06 01:28:40,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2021-05-06 01:28:40,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 50 states have (on average 1.06) internal successors, (53), 52 states have internal predecessors, (53), 28 states have call successors, (28), 15 states have call predecessors, (28), 14 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-06 01:28:40,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 106 transitions. [2021-05-06 01:28:40,431 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 106 transitions. Word has length 75 [2021-05-06 01:28:40,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 01:28:40,431 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 106 transitions. [2021-05-06 01:28:40,431 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 01:28:40,431 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 106 transitions. [2021-05-06 01:28:40,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-05-06 01:28:40,432 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 01:28:40,432 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 01:28:40,650 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-06 01:28:40,651 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 01:28:40,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 01:28:40,651 INFO L82 PathProgramCache]: Analyzing trace with hash -63758730, now seen corresponding path program 5 times [2021-05-06 01:28:40,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 01:28:40,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914131169] [2021-05-06 01:28:40,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 01:28:40,657 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 01:28:40,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1174818613] [2021-05-06 01:28:40,657 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 01:28:40,713 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-06 01:28:40,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 01:28:40,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-06 01:28:40,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 01:28:40,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:40,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:40,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:40,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:40,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:40,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:40,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:40,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:40,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:40,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:40,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:40,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:40,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:40,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:40,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:40,898 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 39 proven. 26 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-05-06 01:28:40,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 01:28:40,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914131169] [2021-05-06 01:28:40,898 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 01:28:40,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174818613] [2021-05-06 01:28:40,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174818613] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 01:28:40,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 01:28:40,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 01:28:40,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111802671] [2021-05-06 01:28:40,898 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 01:28:40,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 01:28:40,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 01:28:40,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 01:28:40,899 INFO L87 Difference]: Start difference. First operand 93 states and 106 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 01:28:41,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 01:28:41,192 INFO L93 Difference]: Finished difference Result 116 states and 138 transitions. [2021-05-06 01:28:41,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 01:28:41,193 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 76 [2021-05-06 01:28:41,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 01:28:41,194 INFO L225 Difference]: With dead ends: 116 [2021-05-06 01:28:41,194 INFO L226 Difference]: Without dead ends: 113 [2021-05-06 01:28:41,194 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 61.9ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-06 01:28:41,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-05-06 01:28:41,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 103. [2021-05-06 01:28:41,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 57 states have (on average 1.0526315789473684) internal successors, (60), 60 states have internal predecessors, (60), 29 states have call successors, (29), 17 states have call predecessors, (29), 16 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2021-05-06 01:28:41,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 115 transitions. [2021-05-06 01:28:41,202 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 115 transitions. Word has length 76 [2021-05-06 01:28:41,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 01:28:41,203 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 115 transitions. [2021-05-06 01:28:41,203 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 01:28:41,203 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 115 transitions. [2021-05-06 01:28:41,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-06 01:28:41,203 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 01:28:41,203 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 01:28:41,422 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 01:28:41,424 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 01:28:41,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 01:28:41,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1701746168, now seen corresponding path program 1 times [2021-05-06 01:28:41,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 01:28:41,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739407665] [2021-05-06 01:28:41,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 01:28:41,429 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 01:28:41,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2085968493] [2021-05-06 01:28:41,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 01:28:41,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:28:41,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 01:28:41,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 01:28:41,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:41,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:41,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:41,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:41,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:41,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:41,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:41,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:41,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:41,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:41,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:41,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:41,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:41,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:41,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:41,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:41,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:41,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:41,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:41,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:41,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:41,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:41,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:41,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:41,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:41,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:41,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:41,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:41,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:41,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:41,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:41,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:41,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:41,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:41,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:41,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:41,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:41,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:41,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:41,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:41,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:41,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:41,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:41,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:41,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:41,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:41,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:41,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:41,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:41,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:41,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:41,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:41,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:41,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:41,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:41,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:41,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:41,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:41,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:41,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:41,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:41,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:41,753 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2021-05-06 01:28:41,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 01:28:41,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739407665] [2021-05-06 01:28:41,754 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 01:28:41,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085968493] [2021-05-06 01:28:41,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085968493] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 01:28:41,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 01:28:41,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 01:28:41,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208470445] [2021-05-06 01:28:41,754 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 01:28:41,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 01:28:41,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 01:28:41,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 01:28:41,755 INFO L87 Difference]: Start difference. First operand 103 states and 115 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-06 01:28:41,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 01:28:41,831 INFO L93 Difference]: Finished difference Result 109 states and 120 transitions. [2021-05-06 01:28:41,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 01:28:41,831 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 80 [2021-05-06 01:28:41,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 01:28:41,833 INFO L225 Difference]: With dead ends: 109 [2021-05-06 01:28:41,833 INFO L226 Difference]: Without dead ends: 96 [2021-05-06 01:28:41,833 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 37.3ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-06 01:28:41,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-05-06 01:28:41,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2021-05-06 01:28:41,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 54 states have (on average 1.037037037037037) internal successors, (56), 56 states have internal predecessors, (56), 26 states have call successors, (26), 16 states have call predecessors, (26), 15 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-06 01:28:41,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 106 transitions. [2021-05-06 01:28:41,840 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 106 transitions. Word has length 80 [2021-05-06 01:28:41,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 01:28:41,840 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 106 transitions. [2021-05-06 01:28:41,840 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-06 01:28:41,840 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 106 transitions. [2021-05-06 01:28:41,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-05-06 01:28:41,841 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 01:28:41,841 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 01:28:42,059 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 01:28:42,059 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 01:28:42,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 01:28:42,059 INFO L82 PathProgramCache]: Analyzing trace with hash -1156119141, now seen corresponding path program 6 times [2021-05-06 01:28:42,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 01:28:42,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959316149] [2021-05-06 01:28:42,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 01:28:42,065 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 01:28:42,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1675577220] [2021-05-06 01:28:42,065 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 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 01:28:42,160 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-06 01:28:42,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 01:28:42,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-06 01:28:42,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 01:28:42,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:42,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:42,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:42,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:42,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:42,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:42,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:42,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:42,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:42,342 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 82 proven. 17 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2021-05-06 01:28:42,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 01:28:42,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959316149] [2021-05-06 01:28:42,342 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 01:28:42,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675577220] [2021-05-06 01:28:42,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675577220] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 01:28:42,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 01:28:42,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 01:28:42,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210207358] [2021-05-06 01:28:42,343 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 01:28:42,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 01:28:42,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 01:28:42,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-06 01:28:42,343 INFO L87 Difference]: Start difference. First operand 96 states and 106 transitions. Second operand has 11 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-06 01:28:42,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 01:28:42,789 INFO L93 Difference]: Finished difference Result 112 states and 130 transitions. [2021-05-06 01:28:42,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 01:28:42,790 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 81 [2021-05-06 01:28:42,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 01:28:42,790 INFO L225 Difference]: With dead ends: 112 [2021-05-06 01:28:42,790 INFO L226 Difference]: Without dead ends: 110 [2021-05-06 01:28:42,791 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 80.1ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-06 01:28:42,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-05-06 01:28:42,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 101. [2021-05-06 01:28:42,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 57 states have (on average 1.0350877192982457) internal successors, (59), 59 states have internal predecessors, (59), 27 states have call successors, (27), 17 states have call predecessors, (27), 16 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-06 01:28:42,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 111 transitions. [2021-05-06 01:28:42,798 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 111 transitions. Word has length 81 [2021-05-06 01:28:42,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 01:28:42,798 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 111 transitions. [2021-05-06 01:28:42,798 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-06 01:28:42,798 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 111 transitions. [2021-05-06 01:28:42,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-05-06 01:28:42,799 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 01:28:42,799 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 01:28:43,015 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-06 01:28:43,015 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 01:28:43,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 01:28:43,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1087104342, now seen corresponding path program 7 times [2021-05-06 01:28:43,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 01:28:43,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635033757] [2021-05-06 01:28:43,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 01:28:43,021 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 01:28:43,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [419595882] [2021-05-06 01:28:43,021 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 01:28:43,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 01:28:43,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-06 01:28:43,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 01:28:43,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:43,269 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 26 proven. 17 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2021-05-06 01:28:43,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 01:28:43,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635033757] [2021-05-06 01:28:43,269 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 01:28:43,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419595882] [2021-05-06 01:28:43,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419595882] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 01:28:43,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 01:28:43,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 01:28:43,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832718964] [2021-05-06 01:28:43,269 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 01:28:43,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 01:28:43,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 01:28:43,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 01:28:43,270 INFO L87 Difference]: Start difference. First operand 101 states and 111 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-05-06 01:28:43,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 01:28:43,461 INFO L93 Difference]: Finished difference Result 116 states and 133 transitions. [2021-05-06 01:28:43,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 01:28:43,462 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), 4 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 86 [2021-05-06 01:28:43,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 01:28:43,462 INFO L225 Difference]: With dead ends: 116 [2021-05-06 01:28:43,462 INFO L226 Difference]: Without dead ends: 111 [2021-05-06 01:28:43,463 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.6ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 01:28:43,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-05-06 01:28:43,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2021-05-06 01:28:43,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 61 states have (on average 1.0491803278688525) internal successors, (64), 63 states have internal predecessors, (64), 32 states have call successors, (32), 18 states have call predecessors, (32), 17 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2021-05-06 01:28:43,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 125 transitions. [2021-05-06 01:28:43,495 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 125 transitions. Word has length 86 [2021-05-06 01:28:43,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 01:28:43,495 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 125 transitions. [2021-05-06 01:28:43,495 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), 4 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-05-06 01:28:43,495 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 125 transitions. [2021-05-06 01:28:43,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-06 01:28:43,496 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 01:28:43,496 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 01:28:43,704 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-06 01:28:43,705 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 01:28:43,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 01:28:43,705 INFO L82 PathProgramCache]: Analyzing trace with hash 511374036, now seen corresponding path program 2 times [2021-05-06 01:28:43,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 01:28:43,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015433037] [2021-05-06 01:28:43,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 01:28:43,710 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 01:28:43,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [231143693] [2021-05-06 01:28:43,710 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 01:28:43,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 01:28:43,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 01:28:43,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-06 01:28:43,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 01:28:43,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:43,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:43,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:43,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:43,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:43,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:43,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:43,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:43,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:43,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:43,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:43,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:43,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:43,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:43,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:43,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:43,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:43,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:43,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:43,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:43,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:43,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:43,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:43,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:43,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:43,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:43,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:43,954 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 32 proven. 21 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2021-05-06 01:28:43,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 01:28:43,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015433037] [2021-05-06 01:28:43,954 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 01:28:43,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231143693] [2021-05-06 01:28:43,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231143693] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 01:28:43,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 01:28:43,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 01:28:43,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780805456] [2021-05-06 01:28:43,954 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 01:28:43,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 01:28:43,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 01:28:43,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 01:28:43,955 INFO L87 Difference]: Start difference. First operand 111 states and 125 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2021-05-06 01:28:44,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 01:28:44,068 INFO L93 Difference]: Finished difference Result 117 states and 130 transitions. [2021-05-06 01:28:44,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 01:28:44,069 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) Word has length 102 [2021-05-06 01:28:44,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 01:28:44,069 INFO L225 Difference]: With dead ends: 117 [2021-05-06 01:28:44,069 INFO L226 Difference]: Without dead ends: 115 [2021-05-06 01:28:44,070 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 48.7ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-06 01:28:44,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-05-06 01:28:44,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2021-05-06 01:28:44,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 64 states have (on average 1.046875) internal successors, (67), 66 states have internal predecessors, (67), 32 states have call successors, (32), 19 states have call predecessors, (32), 18 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2021-05-06 01:28:44,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 128 transitions. [2021-05-06 01:28:44,077 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 128 transitions. Word has length 102 [2021-05-06 01:28:44,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 01:28:44,078 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 128 transitions. [2021-05-06 01:28:44,078 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2021-05-06 01:28:44,078 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 128 transitions. [2021-05-06 01:28:44,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-05-06 01:28:44,079 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 01:28:44,079 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 01:28:44,296 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 01:28:44,296 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 01:28:44,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 01:28:44,296 INFO L82 PathProgramCache]: Analyzing trace with hash -360684101, now seen corresponding path program 8 times [2021-05-06 01:28:44,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 01:28:44,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743736928] [2021-05-06 01:28:44,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 01:28:44,302 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 01:28:44,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1971470409] [2021-05-06 01:28:44,302 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 01:28:44,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 01:28:44,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 01:28:44,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 01:28:44,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 01:28:44,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:44,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:44,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:44,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:44,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:44,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:44,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:44,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:44,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:44,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:44,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:44,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:44,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:44,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:44,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:44,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:44,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:44,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:44,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:44,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:44,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:44,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:44,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:44,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:44,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:44,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:44,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:44,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:44,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:44,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:44,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:44,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:44,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:44,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:44,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:44,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:44,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:44,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:44,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:44,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:44,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:44,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:44,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:44,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:44,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:44,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:44,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:44,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:44,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:44,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:44,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:44,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:44,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:44,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:44,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:44,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:44,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:44,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:44,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:44,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:44,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:44,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:44,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:44,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:44,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:44,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:44,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:44,556 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 120 proven. 0 refuted. 0 times theorem prover too weak. 422 trivial. 0 not checked. [2021-05-06 01:28:44,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 01:28:44,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743736928] [2021-05-06 01:28:44,557 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 01:28:44,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971470409] [2021-05-06 01:28:44,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971470409] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 01:28:44,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 01:28:44,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-06 01:28:44,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92349490] [2021-05-06 01:28:44,557 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 01:28:44,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 01:28:44,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 01:28:44,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-05-06 01:28:44,558 INFO L87 Difference]: Start difference. First operand 115 states and 128 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 6 states have call predecessors, (18), 5 states have call successors, (18) [2021-05-06 01:28:44,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 01:28:44,606 INFO L93 Difference]: Finished difference Result 125 states and 136 transitions. [2021-05-06 01:28:44,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 01:28:44,606 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 6 states have call predecessors, (18), 5 states have call successors, (18) Word has length 103 [2021-05-06 01:28:44,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 01:28:44,607 INFO L225 Difference]: With dead ends: 125 [2021-05-06 01:28:44,607 INFO L226 Difference]: Without dead ends: 100 [2021-05-06 01:28:44,607 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 31.3ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-06 01:28:44,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-05-06 01:28:44,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2021-05-06 01:28:44,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 61 states have (on average 1.0) internal successors, (61), 61 states have internal predecessors, (61), 21 states have call successors, (21), 19 states have call predecessors, (21), 17 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-06 01:28:44,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 101 transitions. [2021-05-06 01:28:44,613 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 101 transitions. Word has length 103 [2021-05-06 01:28:44,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 01:28:44,613 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 101 transitions. [2021-05-06 01:28:44,613 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 6 states have call predecessors, (18), 5 states have call successors, (18) [2021-05-06 01:28:44,613 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 101 transitions. [2021-05-06 01:28:44,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-05-06 01:28:44,614 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 01:28:44,614 INFO L523 BasicCegarLoop]: trace histogram [18, 17, 17, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 01:28:44,832 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 01:28:44,833 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 01:28:44,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 01:28:44,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1368175293, now seen corresponding path program 2 times [2021-05-06 01:28:44,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 01:28:44,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488062706] [2021-05-06 01:28:44,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 01:28:44,839 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 01:28:44,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1462003461] [2021-05-06 01:28:44,839 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 01:28:44,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 01:28:44,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 01:28:44,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-06 01:28:44,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 01:28:44,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:44,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:44,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:44,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:44,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:45,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:45,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:45,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:45,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:45,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:45,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:45,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:45,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:45,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:45,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:45,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:45,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:45,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:45,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:45,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:45,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:45,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:45,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:45,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:45,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:45,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:45,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:45,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:45,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 01:28:45,075 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 34 proven. 21 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2021-05-06 01:28:45,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 01:28:45,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488062706] [2021-05-06 01:28:45,076 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 01:28:45,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462003461] [2021-05-06 01:28:45,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462003461] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 01:28:45,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 01:28:45,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 01:28:45,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244186491] [2021-05-06 01:28:45,076 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 01:28:45,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 01:28:45,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 01:28:45,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 01:28:45,077 INFO L87 Difference]: Start difference. First operand 100 states and 101 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2021-05-06 01:28:45,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 01:28:45,194 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2021-05-06 01:28:45,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 01:28:45,194 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) Word has length 107 [2021-05-06 01:28:45,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 01:28:45,195 INFO L225 Difference]: With dead ends: 104 [2021-05-06 01:28:45,195 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 01:28:45,195 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 47.0ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-06 01:28:45,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 01:28:45,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 01:28:45,195 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 01:28:45,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 01:28:45,196 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 107 [2021-05-06 01:28:45,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 01:28:45,196 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 01:28:45,196 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2021-05-06 01:28:45,196 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 01:28:45,196 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 01:28:45,413 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-06 01:28:45,415 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-06 01:28:45,719 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 35 [2021-05-06 01:28:45,875 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 35 [2021-05-06 01:28:46,008 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 35 [2021-05-06 01:28:46,129 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 35 [2021-05-06 01:28:46,275 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 35 [2021-05-06 01:28:46,390 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 36 [2021-05-06 01:28:46,561 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 36 [2021-05-06 01:28:46,732 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 33 [2021-05-06 01:28:46,872 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 29 [2021-05-06 01:28:46,974 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 36 [2021-05-06 01:28:47,125 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 30 [2021-05-06 01:28:47,252 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 35 [2021-05-06 01:28:47,255 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 8) no Hoare annotation was computed. [2021-05-06 01:28:47,255 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 8) no Hoare annotation was computed. [2021-05-06 01:28:47,255 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 8) no Hoare annotation was computed. [2021-05-06 01:28:47,255 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-06 01:28:47,256 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)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-05-06 01:28:47,256 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-06 01:28:47,256 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-06 01:28:47,256 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-06 01:28:47,256 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-06 01:28:47,256 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-06 01:28:47,256 INFO L201 CegarLoopUtils]: At program point assume_abort_if_notENTRY(lines 11 13) the Hoare annotation is: true [2021-05-06 01:28:47,256 INFO L198 CegarLoopUtils]: For program point L12(line 12) no Hoare annotation was computed. [2021-05-06 01:28:47,256 INFO L198 CegarLoopUtils]: For program point L12-2(lines 11 13) no Hoare annotation was computed. [2021-05-06 01:28:47,256 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 11 13) no Hoare annotation was computed. [2021-05-06 01:28:47,257 INFO L194 CegarLoopUtils]: At program point L33-2(lines 33 46) the Hoare annotation is: (let ((.cse0 (<= 0 main_~a~0)) (.cse2 (= main_~z~0 (+ (* main_~n~0 6) 6))) (.cse1 (<= main_~a~0 1))) (or (and .cse0 .cse1 (= 7 main_~y~0) .cse2 (= (+ main_~y~0 5) main_~z~0) (= main_~x~0 1)) (and .cse0 .cse1 (= main_~y~0 1) (= main_~x~0 0) .cse2 (= main_~z~0 6)) (and .cse1 (= main_~z~0 18) (= main_~n~0 2) (= main_~x~0 8) (<= 1 main_~a~0) (= main_~y~0 (+ main_~z~0 1))))) [2021-05-06 01:28:47,257 INFO L194 CegarLoopUtils]: At program point L33-3(lines 33 46) the Hoare annotation is: (or (and (< main_~a~0 1) (<= 0 main_~a~0) (= main_~n~0 1) (= (+ main_~y~0 5) main_~z~0) (= main_~z~0 12) (= main_~x~0 1)) (and (= main_~z~0 18) (<= main_~n~0 2) (<= 2 main_~n~0) (= main_~x~0 8) (<= 1 main_~a~0) (< main_~a~0 2) (= main_~y~0 (+ main_~z~0 1))) (and (= main_~y~0 1) (= main_~x~0 0) (= main_~z~0 6) (= main_~n~0 0))) [2021-05-06 01:28:47,257 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 22 56) no Hoare annotation was computed. [2021-05-06 01:28:47,257 INFO L194 CegarLoopUtils]: At program point L52(line 52) the Hoare annotation is: (let ((.cse0 (= main_~z~0 (+ (* main_~n~0 6) 6)))) (or (and (= main_~y~0 1) .cse0 (= main_~x~0 0) (= main_~z~0 6)) (and (= 19 main_~y~0) (= main_~n~0 2) .cse0 (= main_~x~0 8)) (and .cse0 (<= (+ main_~x~0 main_~z~0) (+ main_~y~0 6)) (= main_~z~0 12) (= main_~x~0 1)))) [2021-05-06 01:28:47,257 INFO L194 CegarLoopUtils]: At program point L50(line 50) the Hoare annotation is: (let ((.cse0 (= main_~z~0 (+ (* main_~n~0 6) 6)))) (or (and (= main_~y~0 1) .cse0 (= main_~x~0 0) (= main_~z~0 6)) (and (< main_~a~0 1) (<= 0 main_~a~0) .cse0 (= (+ main_~y~0 6) (+ main_~x~0 main_~z~0)) (= main_~z~0 12) (= main_~x~0 1)) (and (= 19 main_~y~0) (= main_~n~0 2) .cse0 (= main_~x~0 8)))) [2021-05-06 01:28:47,257 INFO L194 CegarLoopUtils]: At program point L48(line 48) the Hoare annotation is: (or (and (< main_~a~0 1) (<= 0 main_~a~0) (= main_~n~0 1) (= (+ main_~y~0 5) main_~z~0) (= main_~z~0 12) (= main_~x~0 1)) (and (= main_~z~0 18) (<= main_~n~0 2) (<= 2 main_~n~0) (= main_~x~0 8) (<= 1 main_~a~0) (< main_~a~0 2) (= main_~y~0 (+ main_~z~0 1))) (and (= main_~y~0 1) (= main_~x~0 0) (= main_~z~0 6) (= main_~n~0 0))) [2021-05-06 01:28:47,257 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 22 56) no Hoare annotation was computed. [2021-05-06 01:28:47,258 INFO L198 CegarLoopUtils]: For program point L38(lines 33 46) no Hoare annotation was computed. [2021-05-06 01:28:47,258 INFO L194 CegarLoopUtils]: At program point L36(line 36) the Hoare annotation is: (let ((.cse0 (<= 0 main_~a~0)) (.cse1 (<= main_~a~0 1))) (or (and .cse0 (= main_~n~0 1) .cse1 (= (+ main_~y~0 5) main_~z~0) (= main_~z~0 12) (= main_~x~0 1)) (and .cse0 .cse1 (= main_~y~0 1) (= main_~x~0 0) (= main_~z~0 6) (= main_~n~0 0)) (and .cse1 (= main_~z~0 18) (<= main_~n~0 2) (<= 2 main_~n~0) (= main_~x~0 8) (<= 1 main_~a~0) (= main_~y~0 (+ main_~z~0 1))))) [2021-05-06 01:28:47,258 INFO L194 CegarLoopUtils]: At program point L34(line 34) the Hoare annotation is: (let ((.cse0 (<= 0 main_~a~0)) (.cse2 (= main_~z~0 (+ (* main_~n~0 6) 6))) (.cse1 (<= main_~a~0 1))) (or (and .cse0 .cse1 (= 7 main_~y~0) .cse2 (= (+ main_~y~0 5) main_~z~0) (= main_~x~0 1)) (and .cse0 .cse1 (= main_~y~0 1) (= main_~x~0 0) .cse2 (= main_~z~0 6)) (and .cse1 (= main_~z~0 18) (= main_~n~0 2) (= main_~x~0 8) (<= 1 main_~a~0) (= main_~y~0 (+ main_~z~0 1))))) [2021-05-06 01:28:47,258 INFO L194 CegarLoopUtils]: At program point L34-1(line 34) the Hoare annotation is: (let ((.cse0 (<= 0 main_~a~0)) (.cse2 (= main_~z~0 (+ (* main_~n~0 6) 6))) (.cse1 (<= main_~a~0 1))) (or (and .cse0 .cse1 (= 7 main_~y~0) .cse2 (= (+ main_~y~0 5) main_~z~0) (= main_~x~0 1)) (and .cse0 .cse1 (= main_~y~0 1) (= main_~x~0 0) .cse2 (= main_~z~0 6)) (and .cse1 (= main_~z~0 18) (= main_~n~0 2) (= main_~x~0 8) (<= 1 main_~a~0) (= main_~y~0 (+ main_~z~0 1))))) [2021-05-06 01:28:47,258 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 22 56) the Hoare annotation is: true [2021-05-06 01:28:47,258 INFO L201 CegarLoopUtils]: At program point L26(line 26) the Hoare annotation is: true [2021-05-06 01:28:47,258 INFO L198 CegarLoopUtils]: For program point L26-1(line 26) no Hoare annotation was computed. [2021-05-06 01:28:47,258 INFO L198 CegarLoopUtils]: For program point L53(line 53) no Hoare annotation was computed. [2021-05-06 01:28:47,258 INFO L194 CegarLoopUtils]: At program point L51(line 51) the Hoare annotation is: (let ((.cse0 (= main_~z~0 (+ (* main_~n~0 6) 6)))) (or (and (= main_~y~0 1) .cse0 (= main_~x~0 0) (= main_~z~0 6)) (and (= 7 main_~y~0) .cse0 (= main_~z~0 12) (= main_~x~0 1)) (and (= 19 main_~y~0) (= main_~n~0 2) .cse0 (= main_~x~0 8)))) [2021-05-06 01:28:47,258 INFO L194 CegarLoopUtils]: At program point L49(line 49) the Hoare annotation is: (let ((.cse0 (= main_~z~0 (+ (* main_~n~0 6) 6)))) (or (and (= main_~y~0 1) .cse0 (= main_~x~0 0) (= main_~z~0 6)) (and (< main_~a~0 1) (<= 0 main_~a~0) (= main_~n~0 1) (= (+ main_~y~0 5) main_~z~0) (= main_~z~0 12) (= main_~x~0 1)) (and (= 19 main_~y~0) (= main_~n~0 2) .cse0 (= main_~x~0 8) (<= 1 main_~a~0) (< main_~a~0 2)))) [2021-05-06 01:28:47,258 INFO L194 CegarLoopUtils]: At program point L37(line 37) the Hoare annotation is: (let ((.cse0 (<= 0 main_~a~0)) (.cse1 (<= main_~a~0 1))) (or (and .cse0 (= main_~n~0 1) .cse1 (= (+ main_~y~0 5) main_~z~0) (= main_~z~0 12) (= main_~x~0 1)) (and .cse0 .cse1 (= main_~y~0 1) (= main_~x~0 0) (= main_~z~0 6) (= main_~n~0 0)) (and .cse1 (= main_~z~0 18) (<= main_~n~0 2) (<= 2 main_~n~0) (= main_~x~0 8) (<= 1 main_~a~0) (= main_~y~0 (+ main_~z~0 1))))) [2021-05-06 01:28:47,258 INFO L194 CegarLoopUtils]: At program point L35(line 35) the Hoare annotation is: (let ((.cse0 (<= 0 main_~a~0)) (.cse1 (<= main_~a~0 1))) (or (and .cse0 (= main_~n~0 1) .cse1 (= (+ main_~y~0 5) main_~z~0) (= main_~z~0 12) (= main_~x~0 1)) (and .cse0 .cse1 (= main_~y~0 1) (= main_~x~0 0) (= main_~z~0 6) (= main_~n~0 0)) (and .cse1 (= main_~z~0 18) (<= main_~n~0 2) (<= 2 main_~n~0) (= main_~x~0 8) (<= 1 main_~a~0) (= main_~y~0 (+ main_~z~0 1))))) [2021-05-06 01:28:47,258 INFO L198 CegarLoopUtils]: For program point L16(lines 16 17) no Hoare annotation was computed. [2021-05-06 01:28:47,258 INFO L198 CegarLoopUtils]: For program point L15(lines 15 18) no Hoare annotation was computed. [2021-05-06 01:28:47,258 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 14 20) the Hoare annotation is: true [2021-05-06 01:28:47,258 INFO L198 CegarLoopUtils]: For program point L15-2(lines 14 20) no Hoare annotation was computed. [2021-05-06 01:28:47,259 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 14 20) no Hoare annotation was computed. [2021-05-06 01:28:47,259 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2021-05-06 01:28:47,271 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 01:28:47 BoogieIcfgContainer [2021-05-06 01:28:47,271 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 01:28:47,271 INFO L168 Benchmark]: Toolchain (without parser) took 11827.31 ms. Allocated memory was 177.2 MB in the beginning and 332.4 MB in the end (delta: 155.2 MB). Free memory was 141.3 MB in the beginning and 140.5 MB in the end (delta: 795.2 kB). Peak memory consumption was 156.8 MB. Max. memory is 8.0 GB. [2021-05-06 01:28:47,271 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 177.2 MB. Free memory is still 157.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 01:28:47,271 INFO L168 Benchmark]: CACSL2BoogieTranslator took 216.39 ms. Allocated memory is still 177.2 MB. Free memory was 141.1 MB in the beginning and 131.1 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-05-06 01:28:47,271 INFO L168 Benchmark]: Boogie Preprocessor took 76.55 ms. Allocated memory is still 177.2 MB. Free memory was 130.9 MB in the beginning and 159.9 MB in the end (delta: -29.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2021-05-06 01:28:47,271 INFO L168 Benchmark]: RCFGBuilder took 259.23 ms. Allocated memory is still 177.2 MB. Free memory was 159.9 MB in the beginning and 143.6 MB in the end (delta: 16.3 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. [2021-05-06 01:28:47,272 INFO L168 Benchmark]: TraceAbstraction took 11270.42 ms. Allocated memory was 177.2 MB in the beginning and 332.4 MB in the end (delta: 155.2 MB). Free memory was 143.1 MB in the beginning and 140.5 MB in the end (delta: 2.6 MB). Peak memory consumption was 157.8 MB. Max. memory is 8.0 GB. [2021-05-06 01:28:47,272 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 177.2 MB. Free memory is still 157.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 216.39 ms. Allocated memory is still 177.2 MB. Free memory was 141.1 MB in the beginning and 131.1 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 76.55 ms. Allocated memory is still 177.2 MB. Free memory was 130.9 MB in the beginning and 159.9 MB in the end (delta: -29.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * RCFGBuilder took 259.23 ms. Allocated memory is still 177.2 MB. Free memory was 159.9 MB in the beginning and 143.6 MB in the end (delta: 16.3 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 11270.42 ms. Allocated memory was 177.2 MB in the beginning and 332.4 MB in the end (delta: 155.2 MB). Free memory was 143.1 MB in the beginning and 140.5 MB in the end (delta: 2.6 MB). Peak memory consumption was 157.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 17]: 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, 39 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 9371.8ms, OverallIterations: 17, TraceHistogramMax: 18, EmptinessCheckTime: 30.2ms, AutomataDifference: 2232.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 1841.0ms, InitialAbstractionConstructionTime: 14.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 811 SDtfs, 143 SDslu, 2841 SDs, 0 SdLazy, 1787 SolverSat, 171 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1430.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1043 GetRequests, 938 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 649.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=115occurred in iteration=15, InterpolantAutomatonStates: 113, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 177.7ms AutomataMinimizationTime, 17 MinimizatonAttempts, 52 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 19 LocationsWithAnnotation, 73 PreInvPairs, 109 NumberOfFragments, 792 HoareAnnotationTreeSize, 73 FomulaSimplifications, 17587 FormulaSimplificationTreeSizeReduction, 176.8ms HoareSimplificationTime, 19 FomulaSimplificationsInter, 6749 FormulaSimplificationTreeSizeReductionInter, 1652.1ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 133.6ms SsaConstructionTime, 434.3ms SatisfiabilityAnalysisTime, 2352.2ms InterpolantComputationTime, 1051 NumberOfCodeBlocks, 1001 NumberOfCodeBlocksAsserted, 33 NumberOfCheckSat, 1034 ConstructedInterpolants, 0 QuantifiedInterpolants, 3635 SizeOfPredicates, 30 NumberOfNonLiveVariables, 2930 ConjunctsInSsa, 265 ConjunctsInUnsatCore, 17 InterpolantComputations, 6 PerfectInterpolantSequences, 3503/3637 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: 33]: Loop Invariant Derived loop invariant: ((((((0 <= a && a <= 1) && 7 == y) && z == n * 6 + 6) && y + 5 == z) && x == 1) || (((((0 <= a && a <= 1) && y == 1) && x == 0) && z == n * 6 + 6) && z == 6)) || (((((a <= 1 && z == 18) && n == 2) && x == 8) && 1 <= a) && y == z + 1) RESULT: Ultimate proved your program to be correct! Received shutdown request...