/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-examples/standard_copy8_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-21 21:28:49,527 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-21 21:28:49,530 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-21 21:28:49,580 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-21 21:28:49,581 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-21 21:28:49,583 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-21 21:28:49,585 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-21 21:28:49,587 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-21 21:28:49,590 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-21 21:28:49,591 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-21 21:28:49,592 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-21 21:28:49,594 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-21 21:28:49,595 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-21 21:28:49,596 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-21 21:28:49,598 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-21 21:28:49,600 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-21 21:28:49,601 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-21 21:28:49,602 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-21 21:28:49,619 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-21 21:28:49,622 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-21 21:28:49,625 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-21 21:28:49,627 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-21 21:28:49,629 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-21 21:28:49,630 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-21 21:28:49,633 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-21 21:28:49,638 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-21 21:28:49,639 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-21 21:28:49,640 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-21 21:28:49,641 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-21 21:28:49,643 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-21 21:28:49,643 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-21 21:28:49,644 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-21 21:28:49,644 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-21 21:28:49,645 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-21 21:28:49,646 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-21 21:28:49,647 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-21 21:28:49,648 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-21 21:28:49,679 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-21 21:28:49,680 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-21 21:28:49,681 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-21 21:28:49,682 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-21 21:28:49,682 INFO L138 SettingsManager]: * Use SBE=true [2020-12-21 21:28:49,684 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-21 21:28:49,684 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-21 21:28:49,684 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-21 21:28:49,685 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-21 21:28:49,685 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-21 21:28:49,685 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-21 21:28:49,685 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-21 21:28:49,685 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-21 21:28:49,686 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-21 21:28:49,686 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-21 21:28:49,686 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-21 21:28:49,686 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-21 21:28:49,686 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 21:28:49,687 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-21 21:28:49,687 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-21 21:28:49,687 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-21 21:28:49,687 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-21 21:28:49,689 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-21 21:28:49,689 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-21 21:28:49,690 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-21 21:28:49,690 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-21 21:28:50,114 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-21 21:28:50,144 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-21 21:28:50,148 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-21 21:28:50,150 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-21 21:28:50,151 INFO L275 PluginConnector]: CDTParser initialized [2020-12-21 21:28:50,152 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_copy8_ground-2.i [2020-12-21 21:28:50,260 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3e37e14f/db8e6c1619cb455cab4458a2eb6340fc/FLAGa4be728cd [2020-12-21 21:28:50,909 INFO L306 CDTParser]: Found 1 translation units. [2020-12-21 21:28:50,910 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copy8_ground-2.i [2020-12-21 21:28:50,923 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3e37e14f/db8e6c1619cb455cab4458a2eb6340fc/FLAGa4be728cd [2020-12-21 21:28:51,259 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3e37e14f/db8e6c1619cb455cab4458a2eb6340fc [2020-12-21 21:28:51,265 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-21 21:28:51,267 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-21 21:28:51,270 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-21 21:28:51,270 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-21 21:28:51,274 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-21 21:28:51,276 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:28:51" (1/1) ... [2020-12-21 21:28:51,277 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@eda7d8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:28:51, skipping insertion in model container [2020-12-21 21:28:51,278 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:28:51" (1/1) ... [2020-12-21 21:28:51,287 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-21 21:28:51,307 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-21 21:28:51,478 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copy8_ground-2.i[816,829] [2020-12-21 21:28:51,509 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 21:28:51,521 INFO L203 MainTranslator]: Completed pre-run [2020-12-21 21:28:51,537 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copy8_ground-2.i[816,829] [2020-12-21 21:28:51,560 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 21:28:51,578 INFO L208 MainTranslator]: Completed translation [2020-12-21 21:28:51,579 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:28:51 WrapperNode [2020-12-21 21:28:51,579 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-21 21:28:51,580 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-21 21:28:51,580 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-21 21:28:51,581 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-21 21:28:51,591 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:28:51" (1/1) ... [2020-12-21 21:28:51,602 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:28:51" (1/1) ... [2020-12-21 21:28:51,636 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-21 21:28:51,638 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-21 21:28:51,638 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-21 21:28:51,638 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-21 21:28:51,649 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:28:51" (1/1) ... [2020-12-21 21:28:51,649 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:28:51" (1/1) ... [2020-12-21 21:28:51,653 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:28:51" (1/1) ... [2020-12-21 21:28:51,654 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:28:51" (1/1) ... [2020-12-21 21:28:51,663 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:28:51" (1/1) ... [2020-12-21 21:28:51,673 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:28:51" (1/1) ... [2020-12-21 21:28:51,680 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:28:51" (1/1) ... [2020-12-21 21:28:51,689 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-21 21:28:51,690 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-21 21:28:51,691 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-21 21:28:51,691 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-21 21:28:51,694 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:28:51" (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 [2020-12-21 21:28:51,835 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-21 21:28:51,836 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-21 21:28:51,836 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-21 21:28:51,836 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-21 21:28:51,836 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-21 21:28:51,837 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-21 21:28:51,837 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-21 21:28:52,626 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-21 21:28:52,626 INFO L299 CfgBuilder]: Removed 16 assume(true) statements. [2020-12-21 21:28:52,631 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:28:52 BoogieIcfgContainer [2020-12-21 21:28:52,631 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-21 21:28:52,637 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-21 21:28:52,637 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-21 21:28:52,642 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-21 21:28:52,643 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 09:28:51" (1/3) ... [2020-12-21 21:28:52,645 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@148ed2ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:28:52, skipping insertion in model container [2020-12-21 21:28:52,645 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:28:51" (2/3) ... [2020-12-21 21:28:52,647 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@148ed2ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:28:52, skipping insertion in model container [2020-12-21 21:28:52,647 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:28:52" (3/3) ... [2020-12-21 21:28:52,649 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_copy8_ground-2.i [2020-12-21 21:28:52,658 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-21 21:28:52,666 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-21 21:28:52,699 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-21 21:28:52,753 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-21 21:28:52,754 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-21 21:28:52,754 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-21 21:28:52,754 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-21 21:28:52,754 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-21 21:28:52,754 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-21 21:28:52,755 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-21 21:28:52,755 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-21 21:28:52,778 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2020-12-21 21:28:52,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-21 21:28:52,787 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:28:52,788 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:28:52,789 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:28:52,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:28:52,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1852783825, now seen corresponding path program 1 times [2020-12-21 21:28:52,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:28:52,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350168912] [2020-12-21 21:28:52,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:28:53,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:28:53,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:28:53,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350168912] [2020-12-21 21:28:53,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:28:53,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 21:28:53,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893315827] [2020-12-21 21:28:53,194 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 21:28:53,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:28:53,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 21:28:53,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 21:28:53,226 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 3 states. [2020-12-21 21:28:53,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:28:53,311 INFO L93 Difference]: Finished difference Result 76 states and 116 transitions. [2020-12-21 21:28:53,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 21:28:53,316 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-12-21 21:28:53,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:28:53,344 INFO L225 Difference]: With dead ends: 76 [2020-12-21 21:28:53,344 INFO L226 Difference]: Without dead ends: 37 [2020-12-21 21:28:53,349 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 21:28:53,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-21 21:28:53,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-12-21 21:28:53,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-21 21:28:53,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2020-12-21 21:28:53,405 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 23 [2020-12-21 21:28:53,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:28:53,405 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2020-12-21 21:28:53,406 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 21:28:53,406 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2020-12-21 21:28:53,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-21 21:28:53,409 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:28:53,410 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-21 21:28:53,410 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-21 21:28:53,411 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:28:53,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:28:53,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1595357053, now seen corresponding path program 1 times [2020-12-21 21:28:53,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:28:53,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866481154] [2020-12-21 21:28:53,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:28:53,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:28:53,540 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:28:53,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866481154] [2020-12-21 21:28:53,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971295642] [2020-12-21 21:28:53,542 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 [2020-12-21 21:28:53,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:28:53,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-21 21:28:53,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:28:53,747 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-21 21:28:53,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:28:53,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-12-21 21:28:53,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399661092] [2020-12-21 21:28:53,751 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 21:28:53,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:28:53,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 21:28:53,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:28:53,752 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand 3 states. [2020-12-21 21:28:53,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:28:53,877 INFO L93 Difference]: Finished difference Result 80 states and 104 transitions. [2020-12-21 21:28:53,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 21:28:53,878 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-12-21 21:28:53,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:28:53,879 INFO L225 Difference]: With dead ends: 80 [2020-12-21 21:28:53,879 INFO L226 Difference]: Without dead ends: 52 [2020-12-21 21:28:53,881 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:28:53,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-21 21:28:53,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 44. [2020-12-21 21:28:53,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-21 21:28:53,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2020-12-21 21:28:53,890 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 25 [2020-12-21 21:28:53,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:28:53,891 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2020-12-21 21:28:53,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 21:28:53,891 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2020-12-21 21:28:53,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-21 21:28:53,893 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:28:53,893 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:28:54,107 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-21 21:28:54,108 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:28:54,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:28:54,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1558845843, now seen corresponding path program 1 times [2020-12-21 21:28:54,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:28:54,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346503058] [2020-12-21 21:28:54,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:28:54,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:28:54,187 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-21 21:28:54,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346503058] [2020-12-21 21:28:54,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321436885] [2020-12-21 21:28:54,189 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 [2020-12-21 21:28:54,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:28:54,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 21:28:54,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:28:54,401 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-21 21:28:54,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:28:54,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-21 21:28:54,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283845699] [2020-12-21 21:28:54,403 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 21:28:54,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:28:54,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 21:28:54,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:28:54,404 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand 5 states. [2020-12-21 21:28:54,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:28:54,478 INFO L93 Difference]: Finished difference Result 86 states and 104 transitions. [2020-12-21 21:28:54,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 21:28:54,481 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 41 [2020-12-21 21:28:54,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:28:54,483 INFO L225 Difference]: With dead ends: 86 [2020-12-21 21:28:54,483 INFO L226 Difference]: Without dead ends: 47 [2020-12-21 21:28:54,484 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:28:54,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-21 21:28:54,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2020-12-21 21:28:54,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-21 21:28:54,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2020-12-21 21:28:54,496 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 41 [2020-12-21 21:28:54,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:28:54,497 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2020-12-21 21:28:54,497 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 21:28:54,497 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2020-12-21 21:28:54,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-21 21:28:54,499 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:28:54,499 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:28:54,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:28:54,714 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:28:54,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:28:54,715 INFO L82 PathProgramCache]: Analyzing trace with hash 1389665195, now seen corresponding path program 2 times [2020-12-21 21:28:54,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:28:54,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418745256] [2020-12-21 21:28:54,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:28:54,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:28:54,783 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-21 21:28:54,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418745256] [2020-12-21 21:28:54,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869076831] [2020-12-21 21:28:54,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:28:54,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:28:54,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:28:54,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 21:28:54,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:28:54,951 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-21 21:28:54,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:28:54,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-21 21:28:54,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711136663] [2020-12-21 21:28:54,953 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 21:28:54,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:28:54,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 21:28:54,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:28:54,955 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand 5 states. [2020-12-21 21:28:55,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:28:55,130 INFO L93 Difference]: Finished difference Result 105 states and 129 transitions. [2020-12-21 21:28:55,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 21:28:55,131 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 43 [2020-12-21 21:28:55,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:28:55,132 INFO L225 Difference]: With dead ends: 105 [2020-12-21 21:28:55,133 INFO L226 Difference]: Without dead ends: 70 [2020-12-21 21:28:55,134 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:28:55,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-12-21 21:28:55,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 62. [2020-12-21 21:28:55,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-12-21 21:28:55,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 71 transitions. [2020-12-21 21:28:55,144 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 71 transitions. Word has length 43 [2020-12-21 21:28:55,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:28:55,145 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 71 transitions. [2020-12-21 21:28:55,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 21:28:55,145 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 71 transitions. [2020-12-21 21:28:55,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-21 21:28:55,147 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:28:55,147 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:28:55,361 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:28:55,362 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:28:55,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:28:55,362 INFO L82 PathProgramCache]: Analyzing trace with hash 897576603, now seen corresponding path program 3 times [2020-12-21 21:28:55,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:28:55,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254173705] [2020-12-21 21:28:55,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:28:55,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:28:55,474 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-12-21 21:28:55,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254173705] [2020-12-21 21:28:55,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179093248] [2020-12-21 21:28:55,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-21 21:28:55,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-21 21:28:55,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:28:55,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 21:28:55,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:28:55,693 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-12-21 21:28:55,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:28:55,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-12-21 21:28:55,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172147765] [2020-12-21 21:28:55,718 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-21 21:28:55,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:28:55,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-21 21:28:55,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-12-21 21:28:55,720 INFO L87 Difference]: Start difference. First operand 62 states and 71 transitions. Second operand 8 states. [2020-12-21 21:28:55,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:28:55,971 INFO L93 Difference]: Finished difference Result 144 states and 170 transitions. [2020-12-21 21:28:55,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-21 21:28:55,972 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 59 [2020-12-21 21:28:55,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:28:55,973 INFO L225 Difference]: With dead ends: 144 [2020-12-21 21:28:55,973 INFO L226 Difference]: Without dead ends: 89 [2020-12-21 21:28:55,974 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-12-21 21:28:55,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-12-21 21:28:55,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 80. [2020-12-21 21:28:55,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-12-21 21:28:55,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 89 transitions. [2020-12-21 21:28:55,985 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 89 transitions. Word has length 59 [2020-12-21 21:28:55,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:28:55,986 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 89 transitions. [2020-12-21 21:28:55,986 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-21 21:28:55,986 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 89 transitions. [2020-12-21 21:28:55,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-21 21:28:55,988 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:28:55,988 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-12-21 21:28:56,201 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:28:56,202 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:28:56,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:28:56,205 INFO L82 PathProgramCache]: Analyzing trace with hash -511310007, now seen corresponding path program 4 times [2020-12-21 21:28:56,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:28:56,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551286452] [2020-12-21 21:28:56,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:28:56,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:28:56,365 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-12-21 21:28:56,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551286452] [2020-12-21 21:28:56,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348116115] [2020-12-21 21:28:56,366 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-21 21:28:56,467 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:28:56,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:28:56,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 21:28:56,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:28:56,578 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-12-21 21:28:56,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:28:56,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-21 21:28:56,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594132670] [2020-12-21 21:28:56,580 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 21:28:56,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:28:56,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 21:28:56,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:28:56,582 INFO L87 Difference]: Start difference. First operand 80 states and 89 transitions. Second operand 7 states. [2020-12-21 21:28:56,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:28:56,613 INFO L93 Difference]: Finished difference Result 154 states and 172 transitions. [2020-12-21 21:28:56,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 21:28:56,614 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 77 [2020-12-21 21:28:56,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:28:56,615 INFO L225 Difference]: With dead ends: 154 [2020-12-21 21:28:56,615 INFO L226 Difference]: Without dead ends: 83 [2020-12-21 21:28:56,616 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:28:56,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-12-21 21:28:56,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2020-12-21 21:28:56,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-12-21 21:28:56,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 91 transitions. [2020-12-21 21:28:56,626 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 91 transitions. Word has length 77 [2020-12-21 21:28:56,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:28:56,626 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 91 transitions. [2020-12-21 21:28:56,626 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 21:28:56,626 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 91 transitions. [2020-12-21 21:28:56,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-21 21:28:56,628 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:28:56,628 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-12-21 21:28:56,842 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-21 21:28:56,843 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:28:56,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:28:56,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1970500999, now seen corresponding path program 5 times [2020-12-21 21:28:56,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:28:56,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707299573] [2020-12-21 21:28:56,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:28:56,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:28:57,049 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-12-21 21:28:57,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707299573] [2020-12-21 21:28:57,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572631590] [2020-12-21 21:28:57,050 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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