/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/bresenham-ll_unwindbound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 13:53:20,598 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 13:53:20,599 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 13:53:20,625 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 13:53:20,640 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 13:53:20,642 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 13:53:20,643 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 13:53:20,644 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 13:53:20,646 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 13:53:20,647 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 13:53:20,650 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 13:53:20,661 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 13:53:20,662 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 13:53:20,663 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 13:53:20,663 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 13:53:20,664 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 13:53:20,665 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 13:53:20,670 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 13:53:20,670 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 13:53:20,671 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 13:53:20,671 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 [2021-05-02 13:53:20,685 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 13:53:20,686 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 13:53:20,686 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 13:53:20,686 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 13:53:20,687 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 13:53:20,687 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 13:53:20,687 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 13:53:20,687 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 13:53:20,687 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 13:53:20,687 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 13:53:20,687 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 13:53:20,687 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 13:53:20,687 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 13:53:20,687 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 13:53:20,688 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 13:53:20,688 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 13:53:20,688 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 13:53:20,688 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 13:53:20,688 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 13:53:20,688 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 13:53:20,688 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 13:53:20,688 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 13:53:20,688 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 13:53:20,689 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 13:53:20,689 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 13:53:20,689 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 13:53:20,689 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 13:53:20,689 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 13:53:20,689 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 13:53:20,940 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 13:53:20,953 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 13:53:20,955 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 13:53:20,956 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 13:53:20,957 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 13:53:20,957 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_unwindbound20.c [2021-05-02 13:53:20,999 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aaf3274cc/869b6ee89f364865a0bb53e7516c4835/FLAG053329292 [2021-05-02 13:53:21,350 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 13:53:21,351 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_unwindbound20.c [2021-05-02 13:53:21,356 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aaf3274cc/869b6ee89f364865a0bb53e7516c4835/FLAG053329292 [2021-05-02 13:53:21,777 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aaf3274cc/869b6ee89f364865a0bb53e7516c4835 [2021-05-02 13:53:21,779 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 13:53:21,780 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 13:53:21,785 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 13:53:21,785 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 13:53:21,787 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 13:53:21,788 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 01:53:21" (1/1) ... [2021-05-02 13:53:21,789 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e17a676 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:53:21, skipping insertion in model container [2021-05-02 13:53:21,789 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 01:53:21" (1/1) ... [2021-05-02 13:53:21,794 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 13:53:21,804 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 13:53:21,915 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/bresenham-ll_unwindbound20.c[597,610] [2021-05-02 13:53:21,936 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 13:53:21,942 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 13:53:21,987 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_unwindbound20.c[597,610] [2021-05-02 13:53:21,992 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 13:53:22,001 INFO L208 MainTranslator]: Completed translation [2021-05-02 13:53:22,001 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:53:22 WrapperNode [2021-05-02 13:53:22,001 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 13:53:22,002 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 13:53:22,002 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 13:53:22,002 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 13:53:22,008 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:53:22" (1/1) ... [2021-05-02 13:53:22,009 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:53:22" (1/1) ... [2021-05-02 13:53:22,013 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:53:22" (1/1) ... [2021-05-02 13:53:22,013 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:53:22" (1/1) ... [2021-05-02 13:53:22,016 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:53:22" (1/1) ... [2021-05-02 13:53:22,021 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:53:22" (1/1) ... [2021-05-02 13:53:22,025 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:53:22" (1/1) ... [2021-05-02 13:53:22,028 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 13:53:22,028 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 13:53:22,028 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 13:53:22,029 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 13:53:22,029 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:53:22" (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 [2021-05-02 13:53:22,089 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 13:53:22,090 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 13:53:22,090 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 13:53:22,090 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 13:53:22,090 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 13:53:22,090 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 13:53:22,090 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 13:53:22,091 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 13:53:22,091 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 13:53:22,091 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 13:53:22,091 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 13:53:22,091 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 13:53:22,092 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 13:53:22,092 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 13:53:22,093 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 13:53:22,093 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 13:53:22,094 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 13:53:22,094 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 13:53:22,094 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 13:53:22,094 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 13:53:22,357 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 13:53:22,357 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 13:53:22,358 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 01:53:22 BoogieIcfgContainer [2021-05-02 13:53:22,358 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 13:53:22,359 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 13:53:22,359 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 13:53:22,361 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 13:53:22,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 01:53:21" (1/3) ... [2021-05-02 13:53:22,362 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f7521d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 01:53:22, skipping insertion in model container [2021-05-02 13:53:22,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:53:22" (2/3) ... [2021-05-02 13:53:22,362 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f7521d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 01:53:22, skipping insertion in model container [2021-05-02 13:53:22,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 01:53:22" (3/3) ... [2021-05-02 13:53:22,363 INFO L111 eAbstractionObserver]: Analyzing ICFG bresenham-ll_unwindbound20.c [2021-05-02 13:53:22,384 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 13:53:22,387 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 13:53:22,401 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 13:53:22,419 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 13:53:22,419 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 13:53:22,419 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 13:53:22,419 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 13:53:22,419 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 13:53:22,419 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 13:53:22,419 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 13:53:22,420 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 13:53:22,432 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 13:53:22,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 13:53:22,436 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:53:22,436 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:53:22,436 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:53:22,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:53:22,441 INFO L82 PathProgramCache]: Analyzing trace with hash 2019451875, now seen corresponding path program 1 times [2021-05-02 13:53:22,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:53:22,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492895586] [2021-05-02 13:53:22,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:53:22,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:53:22,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:53:22,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:53:22,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:53:22,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:53:22,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492895586] [2021-05-02 13:53:22,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492895586] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 13:53:22,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 13:53:22,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 13:53:22,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663431471] [2021-05-02 13:53:22,659 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 13:53:22,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:53:22,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 13:53:22,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 13:53:22,673 INFO L87 Difference]: Start difference. First operand has 25 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:53:22,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:53:22,759 INFO L93 Difference]: Finished difference Result 45 states and 58 transitions. [2021-05-02 13:53:22,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 13:53:22,761 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-02 13:53:22,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:53:22,765 INFO L225 Difference]: With dead ends: 45 [2021-05-02 13:53:22,765 INFO L226 Difference]: Without dead ends: 21 [2021-05-02 13:53:22,768 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 49.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 13:53:22,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-05-02 13:53:22,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2021-05-02 13:53:22,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 13:53:22,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2021-05-02 13:53:22,791 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 12 [2021-05-02 13:53:22,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:53:22,791 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2021-05-02 13:53:22,792 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:53:22,792 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2021-05-02 13:53:22,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 13:53:22,792 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:53:22,792 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:53:22,792 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 13:53:22,793 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:53:22,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:53:22,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1431109416, now seen corresponding path program 1 times [2021-05-02 13:53:22,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:53:22,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839918924] [2021-05-02 13:53:22,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:53:22,804 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:53:22,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2023870763] [2021-05-02 13:53:22,805 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 [2021-05-02 13:53:22,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:53:22,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-02 13:53:22,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:53:23,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:53:23,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:53:23,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839918924] [2021-05-02 13:53:23,044 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:53:23,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023870763] [2021-05-02 13:53:23,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023870763] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 13:53:23,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 13:53:23,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 13:53:23,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747825801] [2021-05-02 13:53:23,046 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 13:53:23,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:53:23,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 13:53:23,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 13:53:23,047 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:53:23,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:53:23,166 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2021-05-02 13:53:23,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 13:53:23,167 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-02 13:53:23,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:53:23,168 INFO L225 Difference]: With dead ends: 34 [2021-05-02 13:53:23,168 INFO L226 Difference]: Without dead ends: 29 [2021-05-02 13:53:23,169 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 46.6ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-02 13:53:23,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-02 13:53:23,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2021-05-02 13:53:23,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 13:53:23,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2021-05-02 13:53:23,174 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 12 [2021-05-02 13:53:23,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:53:23,174 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2021-05-02 13:53:23,174 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:53:23,174 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2021-05-02 13:53:23,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 13:53:23,175 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:53:23,175 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:53:23,391 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 13:53:23,391 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:53:23,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:53:23,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1603905768, now seen corresponding path program 1 times [2021-05-02 13:53:23,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:53:23,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717815084] [2021-05-02 13:53:23,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:53:23,422 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:53:23,423 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1335290308] [2021-05-02 13:53:23,423 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 [2021-05-02 13:53:23,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:53:23,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 13:53:23,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:53:23,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:23,653 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:53:23,653 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:53:23,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717815084] [2021-05-02 13:53:23,653 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:53:23,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335290308] [2021-05-02 13:53:23,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335290308] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:53:23,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:53:23,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 13:53:23,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296843861] [2021-05-02 13:53:23,654 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 13:53:23,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:53:23,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 13:53:23,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-05-02 13:53:23,655 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 13:53:23,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:53:23,790 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2021-05-02 13:53:23,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 13:53:23,791 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2021-05-02 13:53:23,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:53:23,791 INFO L225 Difference]: With dead ends: 44 [2021-05-02 13:53:23,791 INFO L226 Difference]: Without dead ends: 39 [2021-05-02 13:53:23,792 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 88.7ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-02 13:53:23,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-02 13:53:23,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2021-05-02 13:53:23,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 28 states have internal predecessors, (32), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 13:53:23,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2021-05-02 13:53:23,797 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 22 [2021-05-02 13:53:23,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:53:23,797 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2021-05-02 13:53:23,797 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 13:53:23,797 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2021-05-02 13:53:23,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 13:53:23,797 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:53:23,798 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:53:24,019 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:53:24,019 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:53:24,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:53:24,020 INFO L82 PathProgramCache]: Analyzing trace with hash 794559142, now seen corresponding path program 1 times [2021-05-02 13:53:24,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:53:24,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718045106] [2021-05-02 13:53:24,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:53:24,034 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:53:24,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [200251838] [2021-05-02 13:53:24,034 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 [2021-05-02 13:53:24,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:53:24,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 13:53:24,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:53:24,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:24,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:24,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:24,293 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:53:24,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:53:24,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718045106] [2021-05-02 13:53:24,294 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:53:24,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200251838] [2021-05-02 13:53:24,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200251838] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:53:24,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:53:24,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 13:53:24,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544238823] [2021-05-02 13:53:24,295 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 13:53:24,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:53:24,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 13:53:24,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-05-02 13:53:24,295 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 11 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 13:53:24,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:53:24,442 INFO L93 Difference]: Finished difference Result 53 states and 60 transitions. [2021-05-02 13:53:24,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 13:53:24,443 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2021-05-02 13:53:24,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:53:24,443 INFO L225 Difference]: With dead ends: 53 [2021-05-02 13:53:24,443 INFO L226 Difference]: Without dead ends: 51 [2021-05-02 13:53:24,444 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 121.2ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-05-02 13:53:24,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-05-02 13:53:24,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 46. [2021-05-02 13:53:24,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 35 states have internal predecessors, (39), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 13:53:24,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2021-05-02 13:53:24,449 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 22 [2021-05-02 13:53:24,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:53:24,449 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2021-05-02 13:53:24,449 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 13:53:24,449 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2021-05-02 13:53:24,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 13:53:24,450 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:53:24,450 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:53:24,657 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:53:24,657 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:53:24,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:53:24,658 INFO L82 PathProgramCache]: Analyzing trace with hash -1213814707, now seen corresponding path program 1 times [2021-05-02 13:53:24,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:53:24,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808523145] [2021-05-02 13:53:24,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:53:24,665 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:53:24,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1500553097] [2021-05-02 13:53:24,665 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 [2021-05-02 13:53:24,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:53:24,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 13:53:24,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:53:24,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:24,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:24,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:24,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:24,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:24,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:24,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:24,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:24,823 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:53:24,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:53:24,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808523145] [2021-05-02 13:53:24,824 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:53:24,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500553097] [2021-05-02 13:53:24,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500553097] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:53:24,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:53:24,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 13:53:24,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124062185] [2021-05-02 13:53:24,824 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 13:53:24,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:53:24,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 13:53:24,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 13:53:24,825 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 13:53:24,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:53:24,853 INFO L93 Difference]: Finished difference Result 54 states and 58 transitions. [2021-05-02 13:53:24,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 13:53:24,854 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2021-05-02 13:53:24,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:53:24,857 INFO L225 Difference]: With dead ends: 54 [2021-05-02 13:53:24,858 INFO L226 Difference]: Without dead ends: 46 [2021-05-02 13:53:24,859 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 11.3ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 13:53:24,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-02 13:53:24,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-05-02 13:53:24,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 35 states have internal predecessors, (38), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 13:53:24,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2021-05-02 13:53:24,870 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 23 [2021-05-02 13:53:24,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:53:24,871 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2021-05-02 13:53:24,871 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 13:53:24,871 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2021-05-02 13:53:24,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 13:53:24,872 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:53:24,872 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:53:25,080 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:53:25,081 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:53:25,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:53:25,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1132431350, now seen corresponding path program 1 times [2021-05-02 13:53:25,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:53:25,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262712103] [2021-05-02 13:53:25,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:53:25,090 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:53:25,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1880273240] [2021-05-02 13:53:25,090 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 [2021-05-02 13:53:25,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:53:25,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-02 13:53:25,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:53:25,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:25,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:25,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:25,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:25,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:25,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:25,399 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 13:53:25,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:53:25,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262712103] [2021-05-02 13:53:25,399 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:53:25,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880273240] [2021-05-02 13:53:25,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880273240] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:53:25,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:53:25,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 13:53:25,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142582737] [2021-05-02 13:53:25,400 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 13:53:25,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:53:25,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 13:53:25,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-05-02 13:53:25,403 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 14 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 13:53:25,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:53:25,621 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2021-05-02 13:53:25,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 13:53:25,622 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 29 [2021-05-02 13:53:25,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:53:25,623 INFO L225 Difference]: With dead ends: 57 [2021-05-02 13:53:25,623 INFO L226 Difference]: Without dead ends: 49 [2021-05-02 13:53:25,624 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 230.6ms TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-05-02 13:53:25,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-05-02 13:53:25,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2021-05-02 13:53:25,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 28 states have internal predecessors, (32), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 13:53:25,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2021-05-02 13:53:25,635 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 29 [2021-05-02 13:53:25,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:53:25,635 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2021-05-02 13:53:25,636 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 13:53:25,636 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2021-05-02 13:53:25,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 13:53:25,637 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:53:25,637 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:53:25,855 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 13:53:25,856 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:53:25,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:53:25,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1603460440, now seen corresponding path program 2 times [2021-05-02 13:53:25,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:53:25,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633540981] [2021-05-02 13:53:25,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:53:25,863 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:53:25,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1794669288] [2021-05-02 13:53:25,863 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:53:25,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:53:25,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:53:25,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-02 13:53:25,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:53:25,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:26,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:26,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:26,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:26,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:26,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:26,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:26,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:26,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:26,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:53:26,187 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 13:53:26,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:53:26,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633540981] [2021-05-02 13:53:26,187 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:53:26,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794669288] [2021-05-02 13:53:26,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794669288] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:53:26,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:53:26,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 13:53:26,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076885872] [2021-05-02 13:53:26,189 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 13:53:26,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:53:26,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 13:53:26,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-05-02 13:53:26,190 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 13 states, 10 states have (on average 2.1) internal successors, (21), 12 states have internal predecessors, (21), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 13:53:27,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:53:27,673 INFO L93 Difference]: Finished difference Result 53 states and 63 transitions. [2021-05-02 13:53:27,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 13:53:27,674 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 2.1) internal successors, (21), 12 states have internal predecessors, (21), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 32 [2021-05-02 13:53:27,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:53:27,674 INFO L225 Difference]: With dead ends: 53 [2021-05-02 13:53:27,674 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 13:53:27,675 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 233.7ms TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-05-02 13:53:27,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 13:53:27,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 13:53:27,675 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) [2021-05-02 13:53:27,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 13:53:27,675 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 32 [2021-05-02 13:53:27,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:53:27,675 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 13:53:27,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 10 states have (on average 2.1) internal successors, (21), 12 states have internal predecessors, (21), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 13:53:27,676 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 13:53:27,676 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 13:53:27,880 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:53:27,882 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-02 13:53:27,952 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 7) no Hoare annotation was computed. [2021-05-02 13:53:27,953 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 7) no Hoare annotation was computed. [2021-05-02 13:53:27,953 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 7) no Hoare annotation was computed. [2021-05-02 13:53:27,953 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-02 13:53:27,953 INFO L194 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= ~counter~0 |old(~counter~0)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-05-02 13:53:27,953 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-02 13:53:27,953 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-02 13:53:27,953 INFO L194 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: (<= ~counter~0 0) [2021-05-02 13:53:27,953 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-02 13:53:27,953 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-02 13:53:27,953 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notENTRY(lines 10 12) no Hoare annotation was computed. [2021-05-02 13:53:27,953 INFO L198 CegarLoopUtils]: For program point L11(line 11) no Hoare annotation was computed. [2021-05-02 13:53:27,953 INFO L198 CegarLoopUtils]: For program point L11-2(lines 10 12) no Hoare annotation was computed. [2021-05-02 13:53:27,953 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 10 12) no Hoare annotation was computed. [2021-05-02 13:53:27,954 INFO L198 CegarLoopUtils]: For program point L31-1(lines 31 46) no Hoare annotation was computed. [2021-05-02 13:53:27,954 INFO L201 CegarLoopUtils]: At program point L31-3(lines 31 46) the Hoare annotation is: true [2021-05-02 13:53:27,954 INFO L198 CegarLoopUtils]: For program point L31-4(lines 31 46) no Hoare annotation was computed. [2021-05-02 13:53:27,954 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 22 52) no Hoare annotation was computed. [2021-05-02 13:53:27,954 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 22 52) no Hoare annotation was computed. [2021-05-02 13:53:27,954 INFO L201 CegarLoopUtils]: At program point L34(line 34) the Hoare annotation is: true [2021-05-02 13:53:27,954 INFO L198 CegarLoopUtils]: For program point L34-1(lines 31 46) no Hoare annotation was computed. [2021-05-02 13:53:27,954 INFO L194 CegarLoopUtils]: At program point mainENTRY(lines 22 52) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (= ~counter~0 |old(~counter~0)|)) [2021-05-02 13:53:27,954 INFO L201 CegarLoopUtils]: At program point L49(line 49) the Hoare annotation is: true [2021-05-02 13:53:27,954 INFO L198 CegarLoopUtils]: For program point L49-1(line 49) no Hoare annotation was computed. [2021-05-02 13:53:27,954 INFO L198 CegarLoopUtils]: For program point L39(lines 39 44) no Hoare annotation was computed. [2021-05-02 13:53:27,954 INFO L198 CegarLoopUtils]: For program point L39-2(lines 39 44) no Hoare annotation was computed. [2021-05-02 13:53:27,954 INFO L198 CegarLoopUtils]: For program point L15(lines 15 16) no Hoare annotation was computed. [2021-05-02 13:53:27,954 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 13 19) the Hoare annotation is: true [2021-05-02 13:53:27,954 INFO L198 CegarLoopUtils]: For program point L14(lines 14 17) no Hoare annotation was computed. [2021-05-02 13:53:27,954 INFO L198 CegarLoopUtils]: For program point L14-2(lines 13 19) no Hoare annotation was computed. [2021-05-02 13:53:27,954 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 13 19) no Hoare annotation was computed. [2021-05-02 13:53:27,954 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2021-05-02 13:53:27,960 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 01:53:27 BoogieIcfgContainer [2021-05-02 13:53:27,960 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 13:53:27,960 INFO L168 Benchmark]: Toolchain (without parser) took 6180.31 ms. Allocated memory was 215.0 MB in the beginning and 266.3 MB in the end (delta: 51.4 MB). Free memory was 178.5 MB in the beginning and 168.3 MB in the end (delta: 10.2 MB). Peak memory consumption was 62.4 MB. Max. memory is 8.0 GB. [2021-05-02 13:53:27,960 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 215.0 MB. Free memory is still 195.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 13:53:27,960 INFO L168 Benchmark]: CACSL2BoogieTranslator took 216.90 ms. Allocated memory is still 215.0 MB. Free memory was 178.4 MB in the beginning and 196.5 MB in the end (delta: -18.2 MB). Peak memory consumption was 11.0 MB. Max. memory is 8.0 GB. [2021-05-02 13:53:27,961 INFO L168 Benchmark]: Boogie Preprocessor took 25.74 ms. Allocated memory is still 215.0 MB. Free memory was 196.5 MB in the beginning and 195.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 13:53:27,961 INFO L168 Benchmark]: RCFGBuilder took 330.08 ms. Allocated memory is still 215.0 MB. Free memory was 195.1 MB in the beginning and 179.4 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-02 13:53:27,961 INFO L168 Benchmark]: TraceAbstraction took 5600.58 ms. Allocated memory was 215.0 MB in the beginning and 266.3 MB in the end (delta: 51.4 MB). Free memory was 178.8 MB in the beginning and 168.3 MB in the end (delta: 10.5 MB). Peak memory consumption was 62.9 MB. Max. memory is 8.0 GB. [2021-05-02 13:53:27,961 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 215.0 MB. Free memory is still 195.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 216.90 ms. Allocated memory is still 215.0 MB. Free memory was 178.4 MB in the beginning and 196.5 MB in the end (delta: -18.2 MB). Peak memory consumption was 11.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 25.74 ms. Allocated memory is still 215.0 MB. Free memory was 196.5 MB in the beginning and 195.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 330.08 ms. Allocated memory is still 215.0 MB. Free memory was 195.1 MB in the beginning and 179.4 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 5600.58 ms. Allocated memory was 215.0 MB in the beginning and 266.3 MB in the end (delta: 51.4 MB). Free memory was 178.8 MB in the beginning and 168.3 MB in the end (delta: 10.5 MB). Peak memory consumption was 62.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 5464.2ms, OverallIterations: 7, TraceHistogramMax: 3, EmptinessCheckTime: 10.2ms, AutomataDifference: 2258.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 70.9ms, InitialAbstractionConstructionTime: 9.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 132 SDtfs, 93 SDslu, 621 SDs, 0 SdLazy, 876 SolverSat, 30 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1689.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 157 GetRequests, 88 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 781.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=46occurred in iteration=4, InterpolantAutomatonStates: 62, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 51.8ms AutomataMinimizationTime, 7 MinimizatonAttempts, 19 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 8 LocationsWithAnnotation, 20 PreInvPairs, 35 NumberOfFragments, 50 HoareAnnotationTreeSize, 20 FomulaSimplifications, 21 FormulaSimplificationTreeSizeReduction, 24.7ms HoareSimplificationTime, 8 FomulaSimplificationsInter, 236 FormulaSimplificationTreeSizeReductionInter, 40.4ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 64.3ms SsaConstructionTime, 173.9ms SatisfiabilityAnalysisTime, 1308.5ms InterpolantComputationTime, 152 NumberOfCodeBlocks, 152 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 145 ConstructedInterpolants, 0 QuantifiedInterpolants, 1075 SizeOfPredicates, 37 NumberOfNonLiveVariables, 842 ConjunctsInSsa, 155 ConjunctsInUnsatCore, 7 InterpolantComputations, 2 PerfectInterpolantSequences, 16/46 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: 31]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! Received shutdown request...