/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/ps6-ll_valuebound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 05:07:09,375 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 05:07:09,378 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 05:07:09,418 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 05:07:09,440 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 05:07:09,442 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 05:07:09,443 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 05:07:09,445 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 05:07:09,447 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 05:07:09,448 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 05:07:09,451 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 05:07:09,456 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 05:07:09,458 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 05:07:09,459 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 05:07:09,460 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 05:07:09,463 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 05:07:09,469 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 05:07:09,480 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 05:07:09,494 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 05:07:09,494 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 05:07:09,495 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-06 05:07:09,533 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 05:07:09,533 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 05:07:09,536 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 05:07:09,536 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 05:07:09,536 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 05:07:09,537 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 05:07:09,537 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 05:07:09,537 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 05:07:09,537 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 05:07:09,538 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 05:07:09,538 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 05:07:09,539 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 05:07:09,539 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 05:07:09,539 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 05:07:09,539 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 05:07:09,539 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 05:07:09,540 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 05:07:09,540 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 05:07:09,540 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 05:07:09,540 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 05:07:09,541 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 05:07:09,541 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 05:07:09,541 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 05:07:09,541 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 05:07:09,541 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 05:07:09,541 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 05:07:09,542 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 05:07:09,542 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 05:07:09,542 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 05:07:09,894 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 05:07:09,920 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 05:07:09,922 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 05:07:09,923 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 05:07:09,924 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 05:07:09,925 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_valuebound2.c [2021-05-06 05:07:09,989 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/642850220/39bc7a3543d64b75b339f8fc6c9b7d93/FLAGebd10b4d7 [2021-05-06 05:07:10,419 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 05:07:10,420 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_valuebound2.c [2021-05-06 05:07:10,426 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/642850220/39bc7a3543d64b75b339f8fc6c9b7d93/FLAGebd10b4d7 [2021-05-06 05:07:10,801 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/642850220/39bc7a3543d64b75b339f8fc6c9b7d93 [2021-05-06 05:07:10,805 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 05:07:10,807 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 05:07:10,809 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 05:07:10,809 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 05:07:10,812 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 05:07:10,813 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 05:07:10" (1/1) ... [2021-05-06 05:07:10,815 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74113217 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:07:10, skipping insertion in model container [2021-05-06 05:07:10,815 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 05:07:10" (1/1) ... [2021-05-06 05:07:10,822 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 05:07:10,836 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 05:07:10,950 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/ps6-ll_valuebound2.c[458,471] [2021-05-06 05:07:10,969 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 05:07:10,976 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 05:07:10,987 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/ps6-ll_valuebound2.c[458,471] [2021-05-06 05:07:10,998 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 05:07:11,042 INFO L208 MainTranslator]: Completed translation [2021-05-06 05:07:11,043 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:07:11 WrapperNode [2021-05-06 05:07:11,043 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 05:07:11,044 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 05:07:11,044 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 05:07:11,044 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 05:07:11,062 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:07:11" (1/1) ... [2021-05-06 05:07:11,062 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:07:11" (1/1) ... [2021-05-06 05:07:11,069 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:07:11" (1/1) ... [2021-05-06 05:07:11,069 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:07:11" (1/1) ... [2021-05-06 05:07:11,073 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:07:11" (1/1) ... [2021-05-06 05:07:11,077 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:07:11" (1/1) ... [2021-05-06 05:07:11,078 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:07:11" (1/1) ... [2021-05-06 05:07:11,079 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 05:07:11,080 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 05:07:11,080 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 05:07:11,080 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 05:07:11,081 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:07:11" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 05:07:11,157 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 05:07:11,157 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 05:07:11,157 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 05:07:11,157 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 05:07:11,157 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 05:07:11,157 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 05:07:11,158 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 05:07:11,158 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 05:07:11,159 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 05:07:11,159 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 05:07:11,159 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2021-05-06 05:07:11,159 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 05:07:11,160 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 05:07:11,160 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 05:07:11,161 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 05:07:11,161 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 05:07:11,161 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 05:07:11,161 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 05:07:11,161 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 05:07:11,161 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 05:07:11,472 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 05:07:11,472 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 05:07:11,474 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 05:07:11 BoogieIcfgContainer [2021-05-06 05:07:11,474 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 05:07:11,475 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 05:07:11,475 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 05:07:11,478 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 05:07:11,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 05:07:10" (1/3) ... [2021-05-06 05:07:11,479 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60934586 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 05:07:11, skipping insertion in model container [2021-05-06 05:07:11,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:07:11" (2/3) ... [2021-05-06 05:07:11,479 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60934586 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 05:07:11, skipping insertion in model container [2021-05-06 05:07:11,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 05:07:11" (3/3) ... [2021-05-06 05:07:11,480 INFO L111 eAbstractionObserver]: Analyzing ICFG ps6-ll_valuebound2.c [2021-05-06 05:07:11,485 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 05:07:11,489 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 05:07:11,504 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 05:07:11,525 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 05:07:11,525 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 05:07:11,525 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 05:07:11,525 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 05:07:11,525 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 05:07:11,525 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 05:07:11,526 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 05:07:11,526 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 05:07:11,540 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 05:07:11,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 05:07:11,544 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:07:11,545 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:07:11,546 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:07:11,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:07:11,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1098891495, now seen corresponding path program 1 times [2021-05-06 05:07:11,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:07:11,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273859711] [2021-05-06 05:07:11,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:07:11,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:07:11,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 05:07:11,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:07:11,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 05:07:11,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:07:11,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-06 05:07:11,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:07:11,759 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 05:07:11,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:07:11,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273859711] [2021-05-06 05:07:11,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273859711] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 05:07:11,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 05:07:11,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 05:07:11,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491333281] [2021-05-06 05:07:11,765 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 05:07:11,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:07:11,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 05:07:11,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 05:07:11,778 INFO L87 Difference]: Start difference. First operand has 29 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 05:07:11,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:07:11,897 INFO L93 Difference]: Finished difference Result 51 states and 69 transitions. [2021-05-06 05:07:11,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 05:07:11,899 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-06 05:07:11,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:07:11,906 INFO L225 Difference]: With dead ends: 51 [2021-05-06 05:07:11,907 INFO L226 Difference]: Without dead ends: 24 [2021-05-06 05:07:11,909 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 45.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 05:07:11,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-05-06 05:07:11,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-05-06 05:07:11,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 05:07:11,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-05-06 05:07:11,945 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 22 [2021-05-06 05:07:11,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:07:11,946 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-05-06 05:07:11,946 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 05:07:11,946 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-05-06 05:07:11,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 05:07:11,948 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:07:11,948 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:07:11,948 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 05:07:11,948 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:07:11,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:07:11,949 INFO L82 PathProgramCache]: Analyzing trace with hash 769620075, now seen corresponding path program 1 times [2021-05-06 05:07:11,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:07:11,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730374603] [2021-05-06 05:07:11,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:07:11,969 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:07:11,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1219523945] [2021-05-06 05:07:11,970 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 05:07:12,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:07:12,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 05:07:12,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:07:12,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:12,330 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 05:07:12,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:07:12,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730374603] [2021-05-06 05:07:12,331 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:07:12,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219523945] [2021-05-06 05:07:12,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219523945] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 05:07:12,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 05:07:12,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 05:07:12,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328292260] [2021-05-06 05:07:12,333 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 05:07:12,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:07:12,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 05:07:12,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 05:07:12,334 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 05:07:14,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:07:14,513 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2021-05-06 05:07:14,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 05:07:14,513 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 22 [2021-05-06 05:07:14,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:07:14,514 INFO L225 Difference]: With dead ends: 35 [2021-05-06 05:07:14,514 INFO L226 Difference]: Without dead ends: 31 [2021-05-06 05:07:14,515 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.5ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 05:07:14,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-05-06 05:07:14,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-05-06 05:07:14,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 05:07:14,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2021-05-06 05:07:14,525 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 22 [2021-05-06 05:07:14,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:07:14,525 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2021-05-06 05:07:14,525 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 05:07:14,526 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2021-05-06 05:07:14,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-06 05:07:14,526 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:07:14,527 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:07:14,741 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 05:07:14,741 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:07:14,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:07:14,743 INFO L82 PathProgramCache]: Analyzing trace with hash 645812411, now seen corresponding path program 1 times [2021-05-06 05:07:14,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:07:14,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924749103] [2021-05-06 05:07:14,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:07:14,767 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:07:14,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1014819532] [2021-05-06 05:07:14,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:07:14,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:07:14,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 05:07:14,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:07:15,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:15,084 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 05:07:15,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:07:15,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924749103] [2021-05-06 05:07:15,085 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:07:15,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014819532] [2021-05-06 05:07:15,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014819532] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:07:15,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 05:07:15,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 05:07:15,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427699056] [2021-05-06 05:07:15,088 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 05:07:15,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:07:15,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 05:07:15,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 05:07:15,090 INFO L87 Difference]: Start difference. First operand 31 states and 34 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 05:07:15,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:07:15,186 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2021-05-06 05:07:15,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 05:07:15,187 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, (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 29 [2021-05-06 05:07:15,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:07:15,190 INFO L225 Difference]: With dead ends: 42 [2021-05-06 05:07:15,190 INFO L226 Difference]: Without dead ends: 40 [2021-05-06 05:07:15,192 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 45.1ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 05:07:15,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-06 05:07:15,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2021-05-06 05:07:15,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 25 states have internal predecessors, (26), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 05:07:15,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2021-05-06 05:07:15,217 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 29 [2021-05-06 05:07:15,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:07:15,218 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2021-05-06 05:07:15,218 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, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 05:07:15,218 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2021-05-06 05:07:15,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-06 05:07:15,221 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:07:15,221 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:07:15,428 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:07:15,429 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:07:15,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:07:15,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1415216747, now seen corresponding path program 2 times [2021-05-06 05:07:15,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:07:15,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388970431] [2021-05-06 05:07:15,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:07:15,454 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:07:15,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2100680605] [2021-05-06 05:07:15,454 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:07:15,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 05:07:15,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 05:07:15,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 05:07:15,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:07:15,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:15,857 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-05-06 05:07:15,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:07:15,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388970431] [2021-05-06 05:07:15,858 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:07:15,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100680605] [2021-05-06 05:07:15,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100680605] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:07:15,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 05:07:15,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 05:07:15,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986204413] [2021-05-06 05:07:15,858 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 05:07:15,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:07:15,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 05:07:15,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 05:07:15,859 INFO L87 Difference]: Start difference. First operand 39 states and 44 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 05:07:18,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:07:18,026 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2021-05-06 05:07:18,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 05:07:18,027 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 36 [2021-05-06 05:07:18,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:07:18,028 INFO L225 Difference]: With dead ends: 51 [2021-05-06 05:07:18,028 INFO L226 Difference]: Without dead ends: 49 [2021-05-06 05:07:18,028 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.6ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 05:07:18,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-05-06 05:07:18,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2021-05-06 05:07:18,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 31 states have internal predecessors, (32), 12 states have call successors, (12), 7 states have call predecessors, (12), 6 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 05:07:18,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2021-05-06 05:07:18,037 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 36 [2021-05-06 05:07:18,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:07:18,037 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2021-05-06 05:07:18,037 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 05:07:18,037 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2021-05-06 05:07:18,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-06 05:07:18,038 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:07:18,039 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 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 05:07:18,249 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:07:18,249 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:07:18,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:07:18,250 INFO L82 PathProgramCache]: Analyzing trace with hash 463554397, now seen corresponding path program 1 times [2021-05-06 05:07:18,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:07:18,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854736586] [2021-05-06 05:07:18,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:07:18,262 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:07:18,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [582493886] [2021-05-06 05:07:18,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:07:18,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:07:18,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 05:07:18,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:07:18,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:18,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:18,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:18,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:18,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:18,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:18,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:18,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:18,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:18,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:18,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:18,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:18,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:18,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:18,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:18,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:18,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:18,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:18,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:18,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:18,775 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-05-06 05:07:18,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:07:18,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854736586] [2021-05-06 05:07:18,775 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:07:18,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582493886] [2021-05-06 05:07:18,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582493886] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:07:18,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 05:07:18,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 05:07:18,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645041713] [2021-05-06 05:07:18,776 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 05:07:18,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:07:18,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 05:07:18,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 05:07:18,777 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand has 10 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-05-06 05:07:18,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:07:18,967 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2021-05-06 05:07:18,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 05:07:18,968 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 40 [2021-05-06 05:07:18,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:07:18,985 INFO L225 Difference]: With dead ends: 54 [2021-05-06 05:07:18,985 INFO L226 Difference]: Without dead ends: 46 [2021-05-06 05:07:18,986 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 255.2ms TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-05-06 05:07:18,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-06 05:07:18,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-05-06 05:07:18,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 30 states have internal predecessors, (31), 11 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 05:07:18,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2021-05-06 05:07:18,999 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 40 [2021-05-06 05:07:18,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:07:18,999 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2021-05-06 05:07:18,999 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-05-06 05:07:18,999 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2021-05-06 05:07:19,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-06 05:07:19,000 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:07:19,000 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:07:19,228 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:07:19,228 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:07:19,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:07:19,229 INFO L82 PathProgramCache]: Analyzing trace with hash 380668603, now seen corresponding path program 3 times [2021-05-06 05:07:19,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:07:19,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713751704] [2021-05-06 05:07:19,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:07:19,241 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:07:19,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [800204372] [2021-05-06 05:07:19,242 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:07:20,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-06 05:07:20,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 05:07:20,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 05:07:20,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:07:20,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:20,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:20,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:20,231 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-05-06 05:07:20,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:07:20,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713751704] [2021-05-06 05:07:20,232 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:07:20,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800204372] [2021-05-06 05:07:20,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800204372] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:07:20,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 05:07:20,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 05:07:20,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233109111] [2021-05-06 05:07:20,233 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 05:07:20,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:07:20,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 05:07:20,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-06 05:07:20,235 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-06 05:07:20,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:07:20,298 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2021-05-06 05:07:20,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 05:07:20,299 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 43 [2021-05-06 05:07:20,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:07:20,300 INFO L225 Difference]: With dead ends: 52 [2021-05-06 05:07:20,300 INFO L226 Difference]: Without dead ends: 48 [2021-05-06 05:07:20,300 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 46.2ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-06 05:07:20,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-06 05:07:20,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 40. [2021-05-06 05:07:20,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 25 states have (on average 1.04) internal successors, (26), 25 states have internal predecessors, (26), 9 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 05:07:20,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2021-05-06 05:07:20,309 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 43 [2021-05-06 05:07:20,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:07:20,309 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2021-05-06 05:07:20,310 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-06 05:07:20,310 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2021-05-06 05:07:20,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-06 05:07:20,310 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:07:20,311 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:07:20,522 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-06 05:07:20,522 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:07:20,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:07:20,523 INFO L82 PathProgramCache]: Analyzing trace with hash 1886956461, now seen corresponding path program 2 times [2021-05-06 05:07:20,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:07:20,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592922325] [2021-05-06 05:07:20,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:07:20,533 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:07:20,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1485786888] [2021-05-06 05:07:20,533 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:07:20,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 05:07:20,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 05:07:20,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 05:07:20,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:07:20,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:20,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:20,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:20,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:20,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:20,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:20,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:20,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:20,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:20,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:20,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:20,816 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-06 05:07:20,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:07:20,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592922325] [2021-05-06 05:07:20,817 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:07:20,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485786888] [2021-05-06 05:07:20,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485786888] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:07:20,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 05:07:20,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 05:07:20,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304174892] [2021-05-06 05:07:20,818 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 05:07:20,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:07:20,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 05:07:20,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 05:07:20,819 INFO L87 Difference]: Start difference. First operand 40 states and 42 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, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-05-06 05:07:20,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:07:20,917 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2021-05-06 05:07:20,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 05:07:20,917 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, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 47 [2021-05-06 05:07:20,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:07:20,918 INFO L225 Difference]: With dead ends: 49 [2021-05-06 05:07:20,918 INFO L226 Difference]: Without dead ends: 43 [2021-05-06 05:07:20,919 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 57.0ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-06 05:07:20,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-06 05:07:20,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-05-06 05:07:20,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 27 states have (on average 1.037037037037037) internal successors, (28), 27 states have internal predecessors, (28), 10 states have call successors, (10), 7 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 05:07:20,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2021-05-06 05:07:20,927 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 47 [2021-05-06 05:07:20,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:07:20,928 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2021-05-06 05:07:20,928 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, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-05-06 05:07:20,928 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2021-05-06 05:07:20,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-06 05:07:20,929 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:07:20,929 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:07:21,142 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:07:21,142 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:07:21,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:07:21,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1213805219, now seen corresponding path program 3 times [2021-05-06 05:07:21,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:07:21,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324609348] [2021-05-06 05:07:21,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:07:21,150 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:07:21,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1582464609] [2021-05-06 05:07:21,151 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:07:21,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 05:07:21,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 05:07:21,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 05:07:21,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:07:21,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:21,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:21,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:21,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:21,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:21,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:21,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:21,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:21,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:21,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:21,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:21,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:21,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:21,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:21,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:21,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:21,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:21,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:21,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:21,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:21,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:07:21,666 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 48 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-05-06 05:07:21,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:07:21,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324609348] [2021-05-06 05:07:21,667 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:07:21,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582464609] [2021-05-06 05:07:21,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582464609] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:07:21,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 05:07:21,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 05:07:21,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955869154] [2021-05-06 05:07:21,668 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 05:07:21,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:07:21,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 05:07:21,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-05-06 05:07:21,668 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2021-05-06 05:07:21,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:07:21,722 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2021-05-06 05:07:21,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 05:07:21,723 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 54 [2021-05-06 05:07:21,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:07:21,724 INFO L225 Difference]: With dead ends: 49 [2021-05-06 05:07:21,724 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 05:07:21,724 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 47.3ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-06 05:07:21,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 05:07:21,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 05:07:21,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-06 05:07:21,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 05:07:21,725 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 54 [2021-05-06 05:07:21,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:07:21,725 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 05:07:21,725 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2021-05-06 05:07:21,725 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 05:07:21,725 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 05:07:21,931 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-06 05:07:21,933 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-06 05:07:22,197 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 36 [2021-05-06 05:07:22,342 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 38 [2021-05-06 05:07:22,450 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 36 [2021-05-06 05:07:22,628 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 38 [2021-05-06 05:07:22,632 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2021-05-06 05:07:22,632 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2021-05-06 05:07:22,632 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2021-05-06 05:07:22,632 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-06 05:07:22,633 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 05:07:22,633 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-06 05:07:22,633 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-06 05:07:22,633 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-06 05:07:22,633 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-06 05:07:22,633 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-06 05:07:22,633 INFO L201 CegarLoopUtils]: At program point assume_abort_if_notENTRY(lines 6 8) the Hoare annotation is: true [2021-05-06 05:07:22,633 INFO L198 CegarLoopUtils]: For program point L7(line 7) no Hoare annotation was computed. [2021-05-06 05:07:22,633 INFO L198 CegarLoopUtils]: For program point L7-2(lines 6 8) no Hoare annotation was computed. [2021-05-06 05:07:22,633 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 6 8) no Hoare annotation was computed. [2021-05-06 05:07:22,633 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 17 42) the Hoare annotation is: true [2021-05-06 05:07:22,634 INFO L194 CegarLoopUtils]: At program point L29(line 29) the Hoare annotation is: (let ((.cse0 (* main_~y~0 main_~y~0 main_~y~0 main_~y~0 main_~y~0)) (.cse1 (<= main_~k~0 2))) (or (and (= main_~c~0 1) (= main_~y~0 1) (= main_~x~0 .cse0) (< 0 main_~k~0) .cse1) (and (= (+ (* main_~x~0 12) (* main_~y~0 main_~y~0)) (+ (* (* main_~y~0 main_~y~0 main_~y~0 main_~y~0) 5) (* .cse0 6) (* (* main_~y~0 main_~y~0 main_~y~0 main_~y~0 main_~y~0 main_~y~0) 2))) (<= main_~c~0 2) (<= 2 main_~c~0) (= main_~y~0 2) (< 1 main_~k~0) .cse1) (and (= main_~c~0 0) (<= 0 main_~k~0) (= main_~y~0 0) (= main_~x~0 0) .cse1))) [2021-05-06 05:07:22,634 INFO L198 CegarLoopUtils]: For program point L29-1(lines 28 37) no Hoare annotation was computed. [2021-05-06 05:07:22,634 INFO L194 CegarLoopUtils]: At program point L28-2(lines 28 37) the Hoare annotation is: (let ((.cse0 (* main_~y~0 main_~y~0 main_~y~0 main_~y~0 main_~y~0)) (.cse1 (<= main_~k~0 2))) (or (and (= main_~c~0 1) (= main_~y~0 1) (= main_~x~0 .cse0) (< 0 main_~k~0) .cse1) (and (= (+ (* main_~x~0 12) (* main_~y~0 main_~y~0)) (+ (* (* main_~y~0 main_~y~0 main_~y~0 main_~y~0) 5) (* .cse0 6) (* (* main_~y~0 main_~y~0 main_~y~0 main_~y~0 main_~y~0 main_~y~0) 2))) (<= main_~c~0 2) (<= 2 main_~c~0) (= main_~y~0 2) (< 1 main_~k~0) .cse1) (and (= main_~c~0 0) (<= 0 main_~k~0) (= main_~y~0 0) (= main_~x~0 0) .cse1))) [2021-05-06 05:07:22,634 INFO L194 CegarLoopUtils]: At program point L28-3(lines 28 37) the Hoare annotation is: (let ((.cse0 (* main_~y~0 main_~y~0 main_~y~0 main_~y~0 main_~y~0))) (or (and (<= main_~k~0 1) (= main_~y~0 1) (= main_~x~0 .cse0) (<= main_~c~0 1) (< 0 main_~k~0)) (and (= main_~y~0 0) (= main_~x~0 0)) (and (= (+ (* main_~x~0 12) (* main_~y~0 main_~y~0)) (+ (* (* main_~y~0 main_~y~0 main_~y~0 main_~y~0) 5) (* .cse0 6) (* (* main_~y~0 main_~y~0 main_~y~0 main_~y~0 main_~y~0 main_~y~0) 2))) (<= main_~c~0 2) (= main_~y~0 2) (< 1 main_~k~0) (<= main_~k~0 2)))) [2021-05-06 05:07:22,634 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 17 42) no Hoare annotation was computed. [2021-05-06 05:07:22,634 INFO L198 CegarLoopUtils]: For program point L22(line 22) no Hoare annotation was computed. [2021-05-06 05:07:22,634 INFO L201 CegarLoopUtils]: At program point L21(line 21) the Hoare annotation is: true [2021-05-06 05:07:22,635 INFO L194 CegarLoopUtils]: At program point L21-1(line 21) the Hoare annotation is: (and (<= 0 main_~k~0) (<= main_~k~0 2)) [2021-05-06 05:07:22,635 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 17 42) no Hoare annotation was computed. [2021-05-06 05:07:22,635 INFO L198 CegarLoopUtils]: For program point L40(line 40) no Hoare annotation was computed. [2021-05-06 05:07:22,635 INFO L194 CegarLoopUtils]: At program point L39(line 39) the Hoare annotation is: (let ((.cse0 (* main_~y~0 main_~y~0 main_~y~0 main_~y~0 main_~y~0))) (or (and (<= .cse0 main_~x~0) (<= main_~k~0 1) (= main_~y~0 1) (<= main_~c~0 1) (< 0 main_~k~0)) (and (= main_~y~0 0) (= main_~x~0 0)) (and (= (+ (* main_~x~0 12) (* main_~y~0 main_~y~0)) (+ (* (* main_~y~0 main_~y~0 main_~y~0 main_~y~0) 5) (* .cse0 6) (* (* main_~y~0 main_~y~0 main_~y~0 main_~y~0 main_~y~0 main_~y~0) 2))) (<= main_~c~0 2) (= main_~y~0 2) (< 1 main_~k~0) (<= main_~k~0 2)))) [2021-05-06 05:07:22,635 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 9 15) the Hoare annotation is: true [2021-05-06 05:07:22,635 INFO L198 CegarLoopUtils]: For program point L11(lines 11 12) no Hoare annotation was computed. [2021-05-06 05:07:22,635 INFO L198 CegarLoopUtils]: For program point L10(lines 10 13) no Hoare annotation was computed. [2021-05-06 05:07:22,635 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 9 15) no Hoare annotation was computed. [2021-05-06 05:07:22,635 INFO L198 CegarLoopUtils]: For program point L10-2(lines 9 15) no Hoare annotation was computed. [2021-05-06 05:07:22,635 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2021-05-06 05:07:22,652 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 05:07:22 BoogieIcfgContainer [2021-05-06 05:07:22,653 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 05:07:22,653 INFO L168 Benchmark]: Toolchain (without parser) took 11846.22 ms. Allocated memory was 201.3 MB in the beginning and 242.2 MB in the end (delta: 40.9 MB). Free memory was 166.3 MB in the beginning and 217.1 MB in the end (delta: -50.8 MB). Peak memory consumption was 123.2 MB. Max. memory is 8.0 GB. [2021-05-06 05:07:22,653 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 201.3 MB. Free memory is still 182.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 05:07:22,653 INFO L168 Benchmark]: CACSL2BoogieTranslator took 234.81 ms. Allocated memory is still 201.3 MB. Free memory was 166.1 MB in the beginning and 185.5 MB in the end (delta: -19.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-05-06 05:07:22,653 INFO L168 Benchmark]: Boogie Preprocessor took 35.38 ms. Allocated memory is still 201.3 MB. Free memory was 185.5 MB in the beginning and 183.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 05:07:22,654 INFO L168 Benchmark]: RCFGBuilder took 393.89 ms. Allocated memory is still 201.3 MB. Free memory was 183.9 MB in the beginning and 169.3 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-06 05:07:22,654 INFO L168 Benchmark]: TraceAbstraction took 11177.41 ms. Allocated memory was 201.3 MB in the beginning and 242.2 MB in the end (delta: 40.9 MB). Free memory was 168.7 MB in the beginning and 217.1 MB in the end (delta: -48.4 MB). Peak memory consumption was 125.6 MB. Max. memory is 8.0 GB. [2021-05-06 05:07:22,654 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 201.3 MB. Free memory is still 182.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 234.81 ms. Allocated memory is still 201.3 MB. Free memory was 166.1 MB in the beginning and 185.5 MB in the end (delta: -19.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 35.38 ms. Allocated memory is still 201.3 MB. Free memory was 185.5 MB in the beginning and 183.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 393.89 ms. Allocated memory is still 201.3 MB. Free memory was 183.9 MB in the beginning and 169.3 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 11177.41 ms. Allocated memory was 201.3 MB in the beginning and 242.2 MB in the end (delta: 40.9 MB). Free memory was 168.7 MB in the beginning and 217.1 MB in the end (delta: -48.4 MB). Peak memory consumption was 125.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: 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, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 10409.3ms, OverallIterations: 8, TraceHistogramMax: 6, EmptinessCheckTime: 16.1ms, AutomataDifference: 5030.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 699.9ms, InitialAbstractionConstructionTime: 10.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 208 SDtfs, 64 SDslu, 765 SDs, 0 SdLazy, 364 SolverSat, 29 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 4588.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 285 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 572.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=47occurred in iteration=4, InterpolantAutomatonStates: 54, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 95.9ms AutomataMinimizationTime, 8 MinimizatonAttempts, 11 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 12 LocationsWithAnnotation, 28 PreInvPairs, 41 NumberOfFragments, 368 HoareAnnotationTreeSize, 28 FomulaSimplifications, 673 FormulaSimplificationTreeSizeReduction, 102.4ms HoareSimplificationTime, 12 FomulaSimplificationsInter, 749 FormulaSimplificationTreeSizeReductionInter, 587.8ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 86.9ms SsaConstructionTime, 1500.7ms SatisfiabilityAnalysisTime, 1670.5ms InterpolantComputationTime, 293 NumberOfCodeBlocks, 279 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 285 ConstructedInterpolants, 0 QuantifiedInterpolants, 866 SizeOfPredicates, 13 NumberOfNonLiveVariables, 1004 ConjunctsInSsa, 89 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 188/214 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: 28]: Loop Invariant Derived loop invariant: (((((c == 1 && y == 1) && x == y * y * y * y * y) && 0 < k) && k <= 2) || (((((x * 12 + y * y == y * y * y * y * 5 + y * y * y * y * y * 6 + y * y * y * y * y * y * 2 && c <= 2) && 2 <= c) && y == 2) && 1 < k) && k <= 2)) || ((((c == 0 && 0 <= k) && y == 0) && x == 0) && k <= 2) RESULT: Ultimate proved your program to be correct! Received shutdown request...