/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/egcd-ll_valuebound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 02:28:19,867 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 02:28:19,869 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 02:28:19,903 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 02:28:19,960 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 02:28:19,961 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 02:28:19,961 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 02:28:19,964 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-06 02:28:19,997 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 02:28:19,997 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 02:28:20,000 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 02:28:20,001 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 02:28:20,001 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 02:28:20,001 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 02:28:20,001 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 02:28:20,001 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 02:28:20,001 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 02:28:20,002 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 02:28:20,002 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 02:28:20,002 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 02:28:20,002 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 02:28:20,003 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 02:28:20,003 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 02:28:20,003 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 02:28:20,003 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 02:28:20,003 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 02:28:20,003 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 02:28:20,004 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 02:28:20,005 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 02:28:20,008 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 02:28:20,008 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 02:28:20,008 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 02:28:20,008 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 02:28:20,008 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 02:28:20,008 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 02:28:20,009 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 02:28:20,009 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 02:28:20,408 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 02:28:20,455 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 02:28:20,457 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 02:28:20,458 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 02:28:20,459 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 02:28:20,460 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_valuebound1.c [2021-05-06 02:28:20,550 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f47c9bc1e/898cfe3264ab4d09ae61105858a44297/FLAG4aaf4ae0b [2021-05-06 02:28:21,107 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 02:28:21,109 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_valuebound1.c [2021-05-06 02:28:21,115 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f47c9bc1e/898cfe3264ab4d09ae61105858a44297/FLAG4aaf4ae0b [2021-05-06 02:28:21,528 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f47c9bc1e/898cfe3264ab4d09ae61105858a44297 [2021-05-06 02:28:21,530 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 02:28:21,531 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 02:28:21,532 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 02:28:21,533 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 02:28:21,535 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 02:28:21,536 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 02:28:21" (1/1) ... [2021-05-06 02:28:21,537 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@902613d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:28:21, skipping insertion in model container [2021-05-06 02:28:21,537 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 02:28:21" (1/1) ... [2021-05-06 02:28:21,542 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 02:28:21,552 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 02:28:21,683 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/egcd-ll_valuebound1.c[489,502] [2021-05-06 02:28:21,694 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 02:28:21,699 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 02:28:21,723 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/egcd-ll_valuebound1.c[489,502] [2021-05-06 02:28:21,757 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 02:28:21,767 INFO L208 MainTranslator]: Completed translation [2021-05-06 02:28:21,767 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:28:21 WrapperNode [2021-05-06 02:28:21,767 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 02:28:21,768 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 02:28:21,768 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 02:28:21,768 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 02:28:21,780 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:28:21" (1/1) ... [2021-05-06 02:28:21,781 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:28:21" (1/1) ... [2021-05-06 02:28:21,793 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:28:21" (1/1) ... [2021-05-06 02:28:21,794 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:28:21" (1/1) ... [2021-05-06 02:28:21,802 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:28:21" (1/1) ... [2021-05-06 02:28:21,805 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:28:21" (1/1) ... [2021-05-06 02:28:21,806 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:28:21" (1/1) ... [2021-05-06 02:28:21,807 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 02:28:21,808 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 02:28:21,808 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 02:28:21,808 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 02:28:21,808 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:28:21" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 02:28:21,872 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 02:28:21,878 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 02:28:21,878 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 02:28:21,878 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 02:28:21,878 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 02:28:21,878 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 02:28:21,878 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 02:28:21,879 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 02:28:21,879 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 02:28:21,879 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 02:28:21,879 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 02:28:21,879 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 02:28:21,879 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 02:28:21,879 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 02:28:21,879 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 02:28:21,879 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 02:28:21,879 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 02:28:21,879 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 02:28:21,879 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 02:28:21,879 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 02:28:22,073 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 02:28:22,073 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 02:28:22,074 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 02:28:22 BoogieIcfgContainer [2021-05-06 02:28:22,074 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 02:28:22,075 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 02:28:22,075 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 02:28:22,077 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 02:28:22,077 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 02:28:21" (1/3) ... [2021-05-06 02:28:22,078 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45132ee6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 02:28:22, skipping insertion in model container [2021-05-06 02:28:22,078 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:28:21" (2/3) ... [2021-05-06 02:28:22,078 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45132ee6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 02:28:22, skipping insertion in model container [2021-05-06 02:28:22,078 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 02:28:22" (3/3) ... [2021-05-06 02:28:22,079 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd-ll_valuebound1.c [2021-05-06 02:28:22,083 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 02:28:22,086 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 02:28:22,097 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 02:28:22,112 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 02:28:22,113 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 02:28:22,113 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 02:28:22,113 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 02:28:22,113 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 02:28:22,113 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 02:28:22,113 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 02:28:22,113 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 02:28:22,124 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 02:28:22,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 02:28:22,128 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:22,129 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:28:22,129 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:22,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:22,133 INFO L82 PathProgramCache]: Analyzing trace with hash 870870740, now seen corresponding path program 1 times [2021-05-06 02:28:22,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:22,139 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531969290] [2021-05-06 02:28:22,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:22,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:28:22,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 02:28:22,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:28:22,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 02:28:22,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:28:22,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 02:28:22,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:28:22,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 02:28:22,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:28:22,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-06 02:28:22,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:28:22,315 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 02:28:22,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:22,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531969290] [2021-05-06 02:28:22,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531969290] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:28:22,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:28:22,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 02:28:22,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817293081] [2021-05-06 02:28:22,320 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 02:28:22,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:22,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 02:28:22,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 02:28:22,330 INFO L87 Difference]: Start difference. First operand has 37 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 02:28:22,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:22,433 INFO L93 Difference]: Finished difference Result 67 states and 105 transitions. [2021-05-06 02:28:22,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 02:28:22,435 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-06 02:28:22,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:22,440 INFO L225 Difference]: With dead ends: 67 [2021-05-06 02:28:22,441 INFO L226 Difference]: Without dead ends: 32 [2021-05-06 02:28:22,443 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 02:28:22,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-06 02:28:22,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-06 02:28:22,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 02:28:22,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2021-05-06 02:28:22,473 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 33 [2021-05-06 02:28:22,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:22,473 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2021-05-06 02:28:22,473 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 02:28:22,473 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2021-05-06 02:28:22,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 02:28:22,475 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:22,475 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:28:22,475 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 02:28:22,475 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:22,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:22,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1006914976, now seen corresponding path program 1 times [2021-05-06 02:28:22,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:22,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786758786] [2021-05-06 02:28:22,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:22,494 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:22,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1128409475] [2021-05-06 02:28:22,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:22,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:28:22,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 02:28:22,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:22,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:22,735 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 02:28:22,735 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:22,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786758786] [2021-05-06 02:28:22,735 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:22,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128409475] [2021-05-06 02:28:22,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128409475] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:28:22,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:28:22,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 02:28:22,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838847212] [2021-05-06 02:28:22,737 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 02:28:22,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:22,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 02:28:22,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:28:22,743 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-06 02:28:22,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:22,812 INFO L93 Difference]: Finished difference Result 48 states and 65 transitions. [2021-05-06 02:28:22,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 02:28:22,812 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 33 [2021-05-06 02:28:22,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:22,815 INFO L225 Difference]: With dead ends: 48 [2021-05-06 02:28:22,815 INFO L226 Difference]: Without dead ends: 46 [2021-05-06 02:28:22,816 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.7ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:28:22,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-06 02:28:22,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2021-05-06 02:28:22,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 23 states have internal predecessors, (26), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 02:28:22,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2021-05-06 02:28:22,840 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 33 [2021-05-06 02:28:22,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:22,841 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2021-05-06 02:28:22,842 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-06 02:28:22,842 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2021-05-06 02:28:22,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-06 02:28:22,846 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:22,846 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:28:23,064 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 02:28:23,064 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:23,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:23,065 INFO L82 PathProgramCache]: Analyzing trace with hash -124657161, now seen corresponding path program 1 times [2021-05-06 02:28:23,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:23,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248964215] [2021-05-06 02:28:23,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:23,089 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:23,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1300186542] [2021-05-06 02:28:23,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:23,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:28:23,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 02:28:23,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:23,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:23,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:23,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:23,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:23,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:23,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:23,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:23,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:23,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:23,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:23,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:23,338 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 02:28:23,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:23,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248964215] [2021-05-06 02:28:23,338 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:23,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300186542] [2021-05-06 02:28:23,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300186542] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:28:23,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:28:23,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 02:28:23,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816872289] [2021-05-06 02:28:23,339 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 02:28:23,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:23,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 02:28:23,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:28:23,340 INFO L87 Difference]: Start difference. First operand 45 states and 62 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 4 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 02:28:23,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:23,459 INFO L93 Difference]: Finished difference Result 70 states and 102 transitions. [2021-05-06 02:28:23,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 02:28:23,460 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 4 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 38 [2021-05-06 02:28:23,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:23,463 INFO L225 Difference]: With dead ends: 70 [2021-05-06 02:28:23,463 INFO L226 Difference]: Without dead ends: 68 [2021-05-06 02:28:23,463 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 48.7ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:28:23,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-06 02:28:23,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 61. [2021-05-06 02:28:23,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 30 states have (on average 1.3) internal successors, (39), 32 states have internal predecessors, (39), 25 states have call successors, (25), 6 states have call predecessors, (25), 5 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2021-05-06 02:28:23,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 87 transitions. [2021-05-06 02:28:23,480 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 87 transitions. Word has length 38 [2021-05-06 02:28:23,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:23,480 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 87 transitions. [2021-05-06 02:28:23,481 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 4 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 02:28:23,481 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 87 transitions. [2021-05-06 02:28:23,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-06 02:28:23,482 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:23,483 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:28:23,697 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:23,698 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:23,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:23,699 INFO L82 PathProgramCache]: Analyzing trace with hash 1732898944, now seen corresponding path program 1 times [2021-05-06 02:28:23,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:23,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680225926] [2021-05-06 02:28:23,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:23,714 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:23,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1448577969] [2021-05-06 02:28:23,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:23,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:28:23,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-06 02:28:23,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:23,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:23,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:23,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:23,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:23,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:23,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:23,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:23,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:23,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:23,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:23,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:23,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:23,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:23,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:23,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:23,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:23,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:23,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:23,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:23,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:23,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:23,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:23,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:23,945 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-06 02:28:23,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:23,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680225926] [2021-05-06 02:28:23,946 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:23,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448577969] [2021-05-06 02:28:23,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448577969] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:28:23,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:28:23,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-05-06 02:28:23,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897989149] [2021-05-06 02:28:23,946 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 02:28:23,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:23,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 02:28:23,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:28:23,947 INFO L87 Difference]: Start difference. First operand 61 states and 87 transitions. Second operand has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2021-05-06 02:28:24,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:24,072 INFO L93 Difference]: Finished difference Result 68 states and 93 transitions. [2021-05-06 02:28:24,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 02:28:24,073 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) Word has length 43 [2021-05-06 02:28:24,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:24,073 INFO L225 Difference]: With dead ends: 68 [2021-05-06 02:28:24,074 INFO L226 Difference]: Without dead ends: 64 [2021-05-06 02:28:24,074 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 69.9ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:28:24,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-06 02:28:24,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-05-06 02:28:24,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 35 states have internal predecessors, (42), 24 states have call successors, (24), 7 states have call predecessors, (24), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 02:28:24,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 87 transitions. [2021-05-06 02:28:24,082 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 87 transitions. Word has length 43 [2021-05-06 02:28:24,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:24,083 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 87 transitions. [2021-05-06 02:28:24,083 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2021-05-06 02:28:24,083 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 87 transitions. [2021-05-06 02:28:24,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-06 02:28:24,084 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:24,084 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:28:24,301 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:24,301 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:24,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:24,302 INFO L82 PathProgramCache]: Analyzing trace with hash -301191846, now seen corresponding path program 1 times [2021-05-06 02:28:24,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:24,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276523482] [2021-05-06 02:28:24,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:24,332 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:24,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [729016722] [2021-05-06 02:28:24,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:24,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:28:24,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 02:28:24,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:24,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:24,546 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-05-06 02:28:24,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:24,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276523482] [2021-05-06 02:28:24,547 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:24,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729016722] [2021-05-06 02:28:24,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729016722] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:28:24,547 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:28:24,547 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 02:28:24,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043650067] [2021-05-06 02:28:24,548 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 02:28:24,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:24,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 02:28:24,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:28:24,548 INFO L87 Difference]: Start difference. First operand 64 states and 87 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2021-05-06 02:28:24,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:24,604 INFO L93 Difference]: Finished difference Result 70 states and 92 transitions. [2021-05-06 02:28:24,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 02:28:24,605 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) Word has length 49 [2021-05-06 02:28:24,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:24,606 INFO L225 Difference]: With dead ends: 70 [2021-05-06 02:28:24,606 INFO L226 Difference]: Without dead ends: 68 [2021-05-06 02:28:24,606 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.1ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:28:24,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-06 02:28:24,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2021-05-06 02:28:24,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 36 states have (on average 1.25) internal successors, (45), 38 states have internal predecessors, (45), 24 states have call successors, (24), 8 states have call predecessors, (24), 7 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 02:28:24,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 90 transitions. [2021-05-06 02:28:24,613 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 90 transitions. Word has length 49 [2021-05-06 02:28:24,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:24,614 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 90 transitions. [2021-05-06 02:28:24,614 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2021-05-06 02:28:24,614 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 90 transitions. [2021-05-06 02:28:24,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-06 02:28:24,614 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:24,615 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:28:24,830 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:24,831 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:24,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:24,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1107651435, now seen corresponding path program 1 times [2021-05-06 02:28:24,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:24,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317545877] [2021-05-06 02:28:24,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:24,841 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:24,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [842455724] [2021-05-06 02:28:24,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:24,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:28:24,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 02:28:24,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:24,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:24,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:24,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:24,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:24,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:24,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:24,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:24,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:24,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:24,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:24,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:24,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:24,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:24,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:24,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:24,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:24,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:24,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:24,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:24,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:25,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:25,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:25,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:25,021 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 02:28:25,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:25,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317545877] [2021-05-06 02:28:25,022 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:25,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842455724] [2021-05-06 02:28:25,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842455724] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:28:25,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:28:25,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 02:28:25,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101569108] [2021-05-06 02:28:25,022 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:28:25,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:25,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:28:25,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:28:25,023 INFO L87 Difference]: Start difference. First operand 68 states and 90 transitions. Second operand has 8 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-06 02:28:25,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:25,083 INFO L93 Difference]: Finished difference Result 82 states and 101 transitions. [2021-05-06 02:28:25,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 02:28:25,083 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 51 [2021-05-06 02:28:25,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:25,084 INFO L225 Difference]: With dead ends: 82 [2021-05-06 02:28:25,084 INFO L226 Difference]: Without dead ends: 52 [2021-05-06 02:28:25,084 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 46.4ms TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:28:25,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-06 02:28:25,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2021-05-06 02:28:25,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 30 states have internal predecessors, (30), 13 states have call successors, (13), 8 states have call predecessors, (13), 7 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 02:28:25,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2021-05-06 02:28:25,089 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 51 [2021-05-06 02:28:25,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:25,089 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2021-05-06 02:28:25,089 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-06 02:28:25,089 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2021-05-06 02:28:25,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-06 02:28:25,090 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:25,090 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:28:25,308 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-06 02:28:25,308 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:25,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:25,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1924168317, now seen corresponding path program 1 times [2021-05-06 02:28:25,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:25,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338609605] [2021-05-06 02:28:25,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:25,319 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:25,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [190209029] [2021-05-06 02:28:25,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:25,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:28:25,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-06 02:28:25,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:25,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:25,500 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-05-06 02:28:25,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:25,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338609605] [2021-05-06 02:28:25,501 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:25,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190209029] [2021-05-06 02:28:25,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190209029] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:28:25,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:28:25,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 02:28:25,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13142294] [2021-05-06 02:28:25,503 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:28:25,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:25,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:28:25,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:28:25,504 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 02:28:25,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:25,601 INFO L93 Difference]: Finished difference Result 55 states and 59 transitions. [2021-05-06 02:28:25,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 02:28:25,601 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 54 [2021-05-06 02:28:25,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:25,602 INFO L225 Difference]: With dead ends: 55 [2021-05-06 02:28:25,602 INFO L226 Difference]: Without dead ends: 43 [2021-05-06 02:28:25,603 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 57.1ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:28:25,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-06 02:28:25,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-05-06 02:28:25,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 25 states have (on average 1.04) internal successors, (26), 26 states have internal predecessors, (26), 11 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 02:28:25,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2021-05-06 02:28:25,611 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 54 [2021-05-06 02:28:25,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:25,612 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2021-05-06 02:28:25,612 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 02:28:25,612 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2021-05-06 02:28:25,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-06 02:28:25,612 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:25,612 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:28:25,816 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:25,817 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:25,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:25,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1698149216, now seen corresponding path program 1 times [2021-05-06 02:28:25,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:25,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891837791] [2021-05-06 02:28:25,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:25,833 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:25,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1700981552] [2021-05-06 02:28:25,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:25,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:28:25,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 02:28:25,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:25,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:25,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:25,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:25,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:25,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:25,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:25,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:25,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:25,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:25,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:25,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:25,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:25,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:25,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:25,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:25,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:26,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:26,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:26,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:26,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:26,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:26,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:26,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:26,025 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 27 proven. 6 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-05-06 02:28:26,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:26,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891837791] [2021-05-06 02:28:26,025 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:26,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700981552] [2021-05-06 02:28:26,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700981552] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:28:26,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:28:26,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 02:28:26,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281550593] [2021-05-06 02:28:26,026 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 02:28:26,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:26,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 02:28:26,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:28:26,027 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-06 02:28:26,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:26,068 INFO L93 Difference]: Finished difference Result 54 states and 57 transitions. [2021-05-06 02:28:26,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 02:28:26,069 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 56 [2021-05-06 02:28:26,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:26,069 INFO L225 Difference]: With dead ends: 54 [2021-05-06 02:28:26,069 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 02:28:26,069 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 29.8ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:28:26,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 02:28:26,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 02:28:26,070 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 02:28:26,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 02:28:26,070 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 56 [2021-05-06 02:28:26,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:26,070 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 02:28:26,070 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-06 02:28:26,070 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 02:28:26,070 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 02:28:26,288 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:26,290 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-06 02:28:26,776 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 4) no Hoare annotation was computed. [2021-05-06 02:28:26,776 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 4) no Hoare annotation was computed. [2021-05-06 02:28:26,776 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 4) no Hoare annotation was computed. [2021-05-06 02:28:26,776 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-06 02:28:26,776 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 02:28:26,776 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-06 02:28:26,776 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-06 02:28:26,776 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-06 02:28:26,777 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-06 02:28:26,777 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-06 02:28:26,777 INFO L201 CegarLoopUtils]: At program point assume_abort_if_notENTRY(lines 7 9) the Hoare annotation is: true [2021-05-06 02:28:26,777 INFO L198 CegarLoopUtils]: For program point L8(line 8) no Hoare annotation was computed. [2021-05-06 02:28:26,777 INFO L198 CegarLoopUtils]: For program point L8-2(lines 7 9) no Hoare annotation was computed. [2021-05-06 02:28:26,777 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 7 9) no Hoare annotation was computed. [2021-05-06 02:28:26,777 INFO L194 CegarLoopUtils]: At program point L35-2(lines 35 52) the Hoare annotation is: (and (= main_~q~0 0) (<= 1 main_~x~0) (= main_~b~0 main_~y~0) (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~x~0 main_~p~0))) (= main_~b~0 main_~a~0) (<= main_~x~0 1) (<= 1 main_~a~0) (= main_~p~0 1) (= main_~s~0 1)) [2021-05-06 02:28:26,777 INFO L194 CegarLoopUtils]: At program point L25(line 25) the Hoare annotation is: (and (<= 1 main_~x~0) (<= 0 main_~y~0) (<= main_~x~0 1) (<= main_~y~0 1)) [2021-05-06 02:28:26,777 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 18 59) no Hoare annotation was computed. [2021-05-06 02:28:26,777 INFO L194 CegarLoopUtils]: At program point L56(line 56) the Hoare annotation is: (and (= main_~q~0 0) (<= 1 main_~x~0) (= main_~b~0 main_~y~0) (<= 1 main_~y~0) (<= main_~x~0 1) (= main_~s~0 1) (<= main_~y~0 1)) [2021-05-06 02:28:26,777 INFO L194 CegarLoopUtils]: At program point L54(line 54) the Hoare annotation is: (and (= main_~q~0 0) (<= 1 main_~x~0) (= main_~b~0 main_~y~0) (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~x~0 main_~p~0))) (= main_~b~0 main_~a~0) (<= main_~x~0 1) (<= 1 main_~a~0) (= main_~p~0 1) (= main_~s~0 1)) [2021-05-06 02:28:26,777 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 18 59) no Hoare annotation was computed. [2021-05-06 02:28:26,777 INFO L198 CegarLoopUtils]: For program point L38(lines 35 52) no Hoare annotation was computed. [2021-05-06 02:28:26,777 INFO L194 CegarLoopUtils]: At program point L36(line 36) the Hoare annotation is: (and (= main_~r~0 0) (= main_~q~0 0) (<= 1 main_~x~0) (= main_~a~0 main_~x~0) (<= main_~b~0 1) (<= 1 main_~b~0) (<= 1 main_~y~0) (<= main_~x~0 1) (= main_~p~0 1) (= main_~s~0 1) (<= main_~y~0 1)) [2021-05-06 02:28:26,778 INFO L194 CegarLoopUtils]: At program point L36-1(line 36) the Hoare annotation is: (and (= main_~r~0 0) (= main_~q~0 0) (<= 1 main_~x~0) (= main_~a~0 main_~x~0) (<= main_~b~0 1) (<= 1 main_~b~0) (<= 1 main_~y~0) (<= main_~x~0 1) (= main_~p~0 1) (= main_~s~0 1) (<= main_~y~0 1)) [2021-05-06 02:28:26,778 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 18 59) the Hoare annotation is: true [2021-05-06 02:28:26,778 INFO L198 CegarLoopUtils]: For program point L26(line 26) no Hoare annotation was computed. [2021-05-06 02:28:26,778 INFO L198 CegarLoopUtils]: For program point L57(line 57) no Hoare annotation was computed. [2021-05-06 02:28:26,778 INFO L194 CegarLoopUtils]: At program point L24(line 24) the Hoare annotation is: (and (<= 0 main_~x~0) (<= main_~x~0 1)) [2021-05-06 02:28:26,778 INFO L194 CegarLoopUtils]: At program point L24-1(line 24) the Hoare annotation is: (and (<= 0 main_~x~0) (<= 0 main_~y~0) (<= main_~x~0 1) (<= main_~y~0 1)) [2021-05-06 02:28:26,778 INFO L194 CegarLoopUtils]: At program point L55(line 55) the Hoare annotation is: (and (= main_~q~0 0) (<= 1 main_~x~0) (= main_~b~0 main_~y~0) (<= 1 main_~y~0) (<= main_~x~0 1) (= main_~p~0 1) (= main_~s~0 1) (<= main_~y~0 1)) [2021-05-06 02:28:26,778 INFO L201 CegarLoopUtils]: At program point L22(line 22) the Hoare annotation is: true [2021-05-06 02:28:26,778 INFO L198 CegarLoopUtils]: For program point L22-1(line 22) no Hoare annotation was computed. [2021-05-06 02:28:26,778 INFO L198 CegarLoopUtils]: For program point L43(lines 43 51) no Hoare annotation was computed. [2021-05-06 02:28:26,778 INFO L194 CegarLoopUtils]: At program point L43-2(lines 35 52) the Hoare annotation is: (and (= main_~r~0 0) (= main_~q~0 0) (<= 1 main_~x~0) (= main_~a~0 main_~x~0) (<= main_~b~0 1) (<= 1 main_~b~0) (<= 1 main_~y~0) (<= main_~x~0 1) (= main_~p~0 1) (= main_~s~0 1) (<= main_~y~0 1)) [2021-05-06 02:28:26,778 INFO L194 CegarLoopUtils]: At program point L37(line 37) the Hoare annotation is: (and (= main_~q~0 0) (<= 1 main_~x~0) (<= main_~a~0 1) (<= main_~b~0 1) (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~x~0 main_~p~0))) (<= 1 main_~b~0) (<= 1 main_~y~0) (<= 1 main_~a~0) (<= main_~x~0 1) (= main_~p~0 1) (= main_~s~0 1) (<= main_~y~0 1)) [2021-05-06 02:28:26,778 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 10 16) the Hoare annotation is: true [2021-05-06 02:28:26,778 INFO L198 CegarLoopUtils]: For program point L12(lines 12 13) no Hoare annotation was computed. [2021-05-06 02:28:26,778 INFO L198 CegarLoopUtils]: For program point L11(lines 11 14) no Hoare annotation was computed. [2021-05-06 02:28:26,778 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 10 16) no Hoare annotation was computed. [2021-05-06 02:28:26,779 INFO L198 CegarLoopUtils]: For program point L11-2(lines 10 16) no Hoare annotation was computed. [2021-05-06 02:28:26,779 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2021-05-06 02:28:26,789 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 02:28:26 BoogieIcfgContainer [2021-05-06 02:28:26,789 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 02:28:26,790 INFO L168 Benchmark]: Toolchain (without parser) took 5258.74 ms. Allocated memory was 202.4 MB in the beginning and 252.7 MB in the end (delta: 50.3 MB). Free memory was 166.5 MB in the beginning and 130.8 MB in the end (delta: 35.8 MB). Peak memory consumption was 128.4 MB. Max. memory is 8.0 GB. [2021-05-06 02:28:26,790 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 202.4 MB. Free memory is still 183.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 02:28:26,790 INFO L168 Benchmark]: CACSL2BoogieTranslator took 234.93 ms. Allocated memory is still 202.4 MB. Free memory was 166.3 MB in the beginning and 185.3 MB in the end (delta: -19.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 8.0 GB. [2021-05-06 02:28:26,790 INFO L168 Benchmark]: Boogie Preprocessor took 39.34 ms. Allocated memory is still 202.4 MB. Free memory was 185.3 MB in the beginning and 183.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-06 02:28:26,790 INFO L168 Benchmark]: RCFGBuilder took 266.25 ms. Allocated memory is still 202.4 MB. Free memory was 183.7 MB in the beginning and 167.5 MB in the end (delta: 16.3 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-06 02:28:26,790 INFO L168 Benchmark]: TraceAbstraction took 4714.16 ms. Allocated memory was 202.4 MB in the beginning and 252.7 MB in the end (delta: 50.3 MB). Free memory was 166.9 MB in the beginning and 130.8 MB in the end (delta: 36.2 MB). Peak memory consumption was 129.0 MB. Max. memory is 8.0 GB. [2021-05-06 02:28:26,790 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 202.4 MB. Free memory is still 183.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 234.93 ms. Allocated memory is still 202.4 MB. Free memory was 166.3 MB in the beginning and 185.3 MB in the end (delta: -19.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 39.34 ms. Allocated memory is still 202.4 MB. Free memory was 185.3 MB in the beginning and 183.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 266.25 ms. Allocated memory is still 202.4 MB. Free memory was 183.7 MB in the beginning and 167.5 MB in the end (delta: 16.3 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 4714.16 ms. Allocated memory was 202.4 MB in the beginning and 252.7 MB in the end (delta: 50.3 MB). Free memory was 166.9 MB in the beginning and 130.8 MB in the end (delta: 36.2 MB). Peak memory consumption was 129.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: 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, 40 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4178.2ms, OverallIterations: 8, TraceHistogramMax: 5, EmptinessCheckTime: 16.2ms, AutomataDifference: 715.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 486.4ms, InitialAbstractionConstructionTime: 8.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 275 SDtfs, 130 SDslu, 845 SDs, 0 SdLazy, 435 SolverSat, 93 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 325.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 347 GetRequests, 293 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 311.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=68occurred in iteration=5, InterpolantAutomatonStates: 56, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 89.8ms AutomataMinimizationTime, 8 MinimizatonAttempts, 11 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 18 LocationsWithAnnotation, 50 PreInvPairs, 61 NumberOfFragments, 330 HoareAnnotationTreeSize, 50 FomulaSimplifications, 414 FormulaSimplificationTreeSizeReduction, 71.3ms HoareSimplificationTime, 18 FomulaSimplificationsInter, 584 FormulaSimplificationTreeSizeReductionInter, 406.0ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 86.3ms SsaConstructionTime, 202.9ms SatisfiabilityAnalysisTime, 1076.9ms InterpolantComputationTime, 357 NumberOfCodeBlocks, 357 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 349 ConstructedInterpolants, 0 QuantifiedInterpolants, 879 SizeOfPredicates, 23 NumberOfNonLiveVariables, 1148 ConjunctsInSsa, 99 ConjunctsInUnsatCore, 8 InterpolantComputations, 4 PerfectInterpolantSequences, 279/307 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: 35]: Loop Invariant Derived loop invariant: (((((((((r == 0 && q == 0) && 1 <= x) && a == x) && b <= 1) && 1 <= b) && 1 <= y) && x <= 1) && p == 1) && s == 1) && y <= 1 RESULT: Ultimate proved your program to be correct! Received shutdown request...