/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/geo1-ll_unwindbound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 02:44:37,350 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 02:44:37,352 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 02:44:37,395 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 02:44:37,427 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 02:44:37,428 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 02:44:37,430 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 02:44:37,431 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 02:44:37,433 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 02:44:37,434 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 02:44:37,436 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 02:44:37,441 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 02:44:37,442 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 02:44:37,444 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 02:44:37,446 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 02:44:37,448 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 02:44:37,454 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 02:44:37,462 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 02:44:37,463 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 02:44:37,464 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 02:44:37,467 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-06 02:44:37,504 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 02:44:37,504 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 02:44:37,505 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 02:44:37,505 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 02:44:37,506 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 02:44:37,506 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 02:44:37,506 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 02:44:37,506 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 02:44:37,506 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 02:44:37,506 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 02:44:37,507 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 02:44:37,507 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 02:44:37,507 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 02:44:37,507 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 02:44:37,507 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 02:44:37,508 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 02:44:37,508 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 02:44:37,508 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 02:44:37,508 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 02:44:37,508 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 02:44:37,508 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 02:44:37,509 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 02:44:37,509 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 02:44:37,509 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 02:44:37,509 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 02:44:37,509 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 02:44:37,510 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 02:44:37,510 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 02:44:37,510 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 02:44:37,781 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 02:44:37,800 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 02:44:37,802 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 02:44:37,803 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 02:44:37,803 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 02:44:37,804 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/geo1-ll_unwindbound50.c [2021-05-06 02:44:37,872 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/13fb3be49/2951e7712fff4defaf4317acce257d2c/FLAG112e03a0e [2021-05-06 02:44:38,257 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 02:44:38,257 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/geo1-ll_unwindbound50.c [2021-05-06 02:44:38,263 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/13fb3be49/2951e7712fff4defaf4317acce257d2c/FLAG112e03a0e [2021-05-06 02:44:38,662 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/13fb3be49/2951e7712fff4defaf4317acce257d2c [2021-05-06 02:44:38,668 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 02:44:38,670 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 02:44:38,673 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 02:44:38,673 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 02:44:38,678 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 02:44:38,679 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 02:44:38" (1/1) ... [2021-05-06 02:44:38,680 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15d8599 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:44:38, skipping insertion in model container [2021-05-06 02:44:38,680 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 02:44:38" (1/1) ... [2021-05-06 02:44:38,689 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 02:44:38,702 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 02:44:38,831 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/geo1-ll_unwindbound50.c[546,559] [2021-05-06 02:44:38,847 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 02:44:38,854 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 02:44:38,910 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/geo1-ll_unwindbound50.c[546,559] [2021-05-06 02:44:38,914 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 02:44:38,924 INFO L208 MainTranslator]: Completed translation [2021-05-06 02:44:38,925 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:44:38 WrapperNode [2021-05-06 02:44:38,925 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 02:44:38,926 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 02:44:38,926 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 02:44:38,926 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 02:44:38,934 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:44:38" (1/1) ... [2021-05-06 02:44:38,934 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:44:38" (1/1) ... [2021-05-06 02:44:38,939 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:44:38" (1/1) ... [2021-05-06 02:44:38,940 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:44:38" (1/1) ... [2021-05-06 02:44:38,944 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:44:38" (1/1) ... [2021-05-06 02:44:38,947 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:44:38" (1/1) ... [2021-05-06 02:44:38,948 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:44:38" (1/1) ... [2021-05-06 02:44:38,949 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 02:44:38,950 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 02:44:38,950 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 02:44:38,950 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 02:44:38,951 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:44:38" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 02:44:39,017 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 02:44:39,017 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 02:44:39,018 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 02:44:39,018 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 02:44:39,018 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 02:44:39,018 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 02:44:39,018 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 02:44:39,018 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 02:44:39,018 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 02:44:39,019 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 02:44:39,019 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 02:44:39,019 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 02:44:39,020 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 02:44:39,020 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 02:44:39,021 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 02:44:39,022 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 02:44:39,022 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 02:44:39,022 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 02:44:39,022 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 02:44:39,022 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 02:44:39,291 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 02:44:39,292 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 02:44:39,293 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 02:44:39 BoogieIcfgContainer [2021-05-06 02:44:39,293 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 02:44:39,294 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 02:44:39,294 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 02:44:39,296 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 02:44:39,308 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 02:44:38" (1/3) ... [2021-05-06 02:44:39,309 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fdcccf5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 02:44:39, skipping insertion in model container [2021-05-06 02:44:39,309 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:44:38" (2/3) ... [2021-05-06 02:44:39,309 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fdcccf5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 02:44:39, skipping insertion in model container [2021-05-06 02:44:39,309 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 02:44:39" (3/3) ... [2021-05-06 02:44:39,310 INFO L111 eAbstractionObserver]: Analyzing ICFG geo1-ll_unwindbound50.c [2021-05-06 02:44:39,315 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 02:44:39,319 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 02:44:39,336 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 02:44:39,368 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 02:44:39,368 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 02:44:39,368 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 02:44:39,368 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 02:44:39,368 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 02:44:39,368 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 02:44:39,368 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 02:44:39,368 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 02:44:39,380 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 02:44:39,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 02:44:39,384 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:44:39,385 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:44:39,385 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:44:39,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:44:39,390 INFO L82 PathProgramCache]: Analyzing trace with hash 730417173, now seen corresponding path program 1 times [2021-05-06 02:44:39,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:44:39,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064623077] [2021-05-06 02:44:39,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:44:39,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:44:39,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 02:44:39,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:44:39,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 02:44:39,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:44:39,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-06 02:44:39,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:44:39,677 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 02:44:39,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:44:39,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064623077] [2021-05-06 02:44:39,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064623077] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:44:39,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:44:39,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 02:44:39,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419462235] [2021-05-06 02:44:39,683 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 02:44:39,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:44:39,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 02:44:39,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 02:44:39,697 INFO L87 Difference]: Start difference. First operand has 30 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 02:44:39,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:44:39,804 INFO L93 Difference]: Finished difference Result 54 states and 70 transitions. [2021-05-06 02:44:39,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 02:44:39,806 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-06 02:44:39,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:44:39,811 INFO L225 Difference]: With dead ends: 54 [2021-05-06 02:44:39,812 INFO L226 Difference]: Without dead ends: 26 [2021-05-06 02:44:39,814 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 56.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 02:44:39,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-06 02:44:39,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-05-06 02:44:39,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 02:44:39,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-05-06 02:44:39,858 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 23 [2021-05-06 02:44:39,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:44:39,858 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-05-06 02:44:39,858 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 02:44:39,858 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-05-06 02:44:39,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 02:44:39,860 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:44:39,860 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:44:39,861 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 02:44:39,861 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:44:39,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:44:39,862 INFO L82 PathProgramCache]: Analyzing trace with hash -942473515, now seen corresponding path program 1 times [2021-05-06 02:44:39,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:44:39,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455049124] [2021-05-06 02:44:39,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:44:39,897 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:44:39,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1801119265] [2021-05-06 02:44:39,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:44:39,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:44:40,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 02:44:40,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:44:40,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:40,132 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 02:44:40,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:44:40,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455049124] [2021-05-06 02:44:40,133 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:44:40,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801119265] [2021-05-06 02:44:40,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801119265] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:44:40,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:44:40,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 02:44:40,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054858871] [2021-05-06 02:44:40,136 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 02:44:40,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:44:40,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 02:44:40,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:44:40,138 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 02:44:40,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:44:40,185 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2021-05-06 02:44:40,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 02:44:40,186 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2021-05-06 02:44:40,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:44:40,187 INFO L225 Difference]: With dead ends: 36 [2021-05-06 02:44:40,187 INFO L226 Difference]: Without dead ends: 34 [2021-05-06 02:44:40,188 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.4ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:44:40,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-06 02:44:40,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2021-05-06 02:44:40,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.2) internal successors, (24), 22 states have internal predecessors, (24), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 02:44:40,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2021-05-06 02:44:40,196 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 23 [2021-05-06 02:44:40,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:44:40,197 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2021-05-06 02:44:40,197 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 02:44:40,197 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2021-05-06 02:44:40,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-06 02:44:40,198 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:44:40,198 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:44:40,418 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 02:44:40,418 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:44:40,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:44:40,419 INFO L82 PathProgramCache]: Analyzing trace with hash 769172850, now seen corresponding path program 1 times [2021-05-06 02:44:40,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:44:40,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859927175] [2021-05-06 02:44:40,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:44:40,433 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:44:40,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [548130086] [2021-05-06 02:44:40,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:44:40,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:44:40,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 02:44:40,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:44:40,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:40,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:40,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:40,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:40,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:40,607 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 02:44:40,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:44:40,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859927175] [2021-05-06 02:44:40,608 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:44:40,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548130086] [2021-05-06 02:44:40,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548130086] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:44:40,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:44:40,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 02:44:40,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116162337] [2021-05-06 02:44:40,610 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 02:44:40,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:44:40,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 02:44:40,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 02:44:40,611 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 02:44:40,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:44:40,629 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2021-05-06 02:44:40,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 02:44:40,631 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2021-05-06 02:44:40,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:44:40,634 INFO L225 Difference]: With dead ends: 40 [2021-05-06 02:44:40,634 INFO L226 Difference]: Without dead ends: 32 [2021-05-06 02:44:40,634 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.0ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 02:44:40,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-06 02:44:40,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-06 02:44:40,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.15) internal successors, (23), 22 states have internal predecessors, (23), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 02:44:40,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2021-05-06 02:44:40,648 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 24 [2021-05-06 02:44:40,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:44:40,649 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2021-05-06 02:44:40,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 02:44:40,649 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2021-05-06 02:44:40,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-06 02:44:40,650 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:44:40,650 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:44:40,870 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:44:40,870 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:44:40,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:44:40,871 INFO L82 PathProgramCache]: Analyzing trace with hash 431121724, now seen corresponding path program 1 times [2021-05-06 02:44:40,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:44:40,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879510780] [2021-05-06 02:44:40,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:44:40,883 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:44:40,884 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [180814891] [2021-05-06 02:44:40,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:44:40,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:44:40,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-06 02:44:40,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:44:41,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:41,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:41,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:41,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:41,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:41,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:44:41,121 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 02:44:41,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:44:41,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879510780] [2021-05-06 02:44:41,122 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:44:41,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180814891] [2021-05-06 02:44:41,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180814891] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:44:41,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:44:41,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 02:44:41,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348936436] [2021-05-06 02:44:41,123 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:44:41,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:44:41,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:44:41,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:44:41,125 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 02:44:41,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:44:41,307 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2021-05-06 02:44:41,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 02:44:41,308 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 30 [2021-05-06 02:44:41,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:44:41,309 INFO L225 Difference]: With dead ends: 32 [2021-05-06 02:44:41,309 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 02:44:41,309 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 48.5ms TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:44:41,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 02:44:41,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 02:44:41,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-06 02:44:41,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 02:44:41,310 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 30 [2021-05-06 02:44:41,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:44:41,310 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 02:44:41,310 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 02:44:41,311 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 02:44:41,311 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 02:44:41,520 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:44:41,522 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-06 02:44:41,655 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 9) no Hoare annotation was computed. [2021-05-06 02:44:41,655 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 9) no Hoare annotation was computed. [2021-05-06 02:44:41,656 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 9) no Hoare annotation was computed. [2021-05-06 02:44:41,656 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-06 02:44:41,656 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|)) [2021-05-06 02:44:41,656 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-06 02:44:41,656 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-06 02:44:41,656 INFO L194 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: (<= ~counter~0 0) [2021-05-06 02:44:41,656 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-06 02:44:41,656 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-06 02:44:41,656 INFO L201 CegarLoopUtils]: At program point assume_abort_if_notENTRY(lines 12 14) the Hoare annotation is: true [2021-05-06 02:44:41,657 INFO L198 CegarLoopUtils]: For program point L13(line 13) no Hoare annotation was computed. [2021-05-06 02:44:41,657 INFO L198 CegarLoopUtils]: For program point L13-2(lines 12 14) no Hoare annotation was computed. [2021-05-06 02:44:41,657 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 12 14) no Hoare annotation was computed. [2021-05-06 02:44:41,657 INFO L194 CegarLoopUtils]: At program point L35-3(lines 35 45) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (= (+ (* main_~x~0 main_~z~0) 1) (+ main_~x~0 main_~y~0))) [2021-05-06 02:44:41,657 INFO L198 CegarLoopUtils]: For program point L35-4(lines 35 45) no Hoare annotation was computed. [2021-05-06 02:44:41,657 INFO L198 CegarLoopUtils]: For program point L29(line 29) no Hoare annotation was computed. [2021-05-06 02:44:41,657 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 23 51) no Hoare annotation was computed. [2021-05-06 02:44:41,657 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 23 51) no Hoare annotation was computed. [2021-05-06 02:44:41,657 INFO L194 CegarLoopUtils]: At program point L36(line 36) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (= (+ (* main_~x~0 main_~z~0) 1) (+ main_~x~0 main_~y~0))) [2021-05-06 02:44:41,658 INFO L198 CegarLoopUtils]: For program point L36-1(lines 35 45) no Hoare annotation was computed. [2021-05-06 02:44:41,658 INFO L194 CegarLoopUtils]: At program point mainENTRY(lines 23 51) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (= ~counter~0 |old(~counter~0)|)) [2021-05-06 02:44:41,658 INFO L194 CegarLoopUtils]: At program point L28(line 28) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (= ~counter~0 |old(~counter~0)|)) [2021-05-06 02:44:41,658 INFO L194 CegarLoopUtils]: At program point L28-1(line 28) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (= ~counter~0 |old(~counter~0)|)) [2021-05-06 02:44:41,658 INFO L194 CegarLoopUtils]: At program point L49(line 49) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (exists ((v_main_~x~0_11 Int) (main_~z~0 Int)) (let ((.cse0 (* v_main_~x~0_11 main_~z~0))) (and (= .cse0 (+ v_main_~x~0_11 main_~x~0)) (= (+ .cse0 1) (+ v_main_~x~0_11 main_~y~0)))))) [2021-05-06 02:44:41,658 INFO L198 CegarLoopUtils]: For program point L49-1(line 49) no Hoare annotation was computed. [2021-05-06 02:44:41,658 INFO L198 CegarLoopUtils]: For program point L35-1(lines 35 45) no Hoare annotation was computed. [2021-05-06 02:44:41,658 INFO L198 CegarLoopUtils]: For program point L17(lines 17 18) no Hoare annotation was computed. [2021-05-06 02:44:41,659 INFO L198 CegarLoopUtils]: For program point L16(lines 16 19) no Hoare annotation was computed. [2021-05-06 02:44:41,659 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 15 21) the Hoare annotation is: true [2021-05-06 02:44:41,659 INFO L198 CegarLoopUtils]: For program point L16-2(lines 15 21) no Hoare annotation was computed. [2021-05-06 02:44:41,659 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 15 21) no Hoare annotation was computed. [2021-05-06 02:44:41,659 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 18) no Hoare annotation was computed. [2021-05-06 02:44:41,671 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 02:44:41 BoogieIcfgContainer [2021-05-06 02:44:41,671 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 02:44:41,671 INFO L168 Benchmark]: Toolchain (without parser) took 3001.32 ms. Allocated memory is still 202.4 MB. Free memory was 165.5 MB in the beginning and 128.0 MB in the end (delta: 37.5 MB). Peak memory consumption was 38.3 MB. Max. memory is 8.0 GB. [2021-05-06 02:44:41,672 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 202.4 MB. Free memory was 182.1 MB in the beginning and 182.0 MB in the end (delta: 86.2 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 02:44:41,672 INFO L168 Benchmark]: CACSL2BoogieTranslator took 251.83 ms. Allocated memory is still 202.4 MB. Free memory was 165.4 MB in the beginning and 183.9 MB in the end (delta: -18.5 MB). Peak memory consumption was 11.8 MB. Max. memory is 8.0 GB. [2021-05-06 02:44:41,672 INFO L168 Benchmark]: Boogie Preprocessor took 23.52 ms. Allocated memory is still 202.4 MB. Free memory was 183.9 MB in the beginning and 182.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 02:44:41,672 INFO L168 Benchmark]: RCFGBuilder took 343.12 ms. Allocated memory is still 202.4 MB. Free memory was 182.3 MB in the beginning and 167.1 MB in the end (delta: 15.2 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-06 02:44:41,672 INFO L168 Benchmark]: TraceAbstraction took 2376.92 ms. Allocated memory is still 202.4 MB. Free memory was 166.6 MB in the beginning and 128.0 MB in the end (delta: 38.5 MB). Peak memory consumption was 39.1 MB. Max. memory is 8.0 GB. [2021-05-06 02:44:41,673 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 202.4 MB. Free memory was 182.1 MB in the beginning and 182.0 MB in the end (delta: 86.2 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 251.83 ms. Allocated memory is still 202.4 MB. Free memory was 165.4 MB in the beginning and 183.9 MB in the end (delta: -18.5 MB). Peak memory consumption was 11.8 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 23.52 ms. Allocated memory is still 202.4 MB. Free memory was 183.9 MB in the beginning and 182.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 343.12 ms. Allocated memory is still 202.4 MB. Free memory was 182.3 MB in the beginning and 167.1 MB in the end (delta: 15.2 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2376.92 ms. Allocated memory is still 202.4 MB. Free memory was 166.6 MB in the beginning and 128.0 MB in the end (delta: 38.5 MB). Peak memory consumption was 39.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 18]: 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, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2155.7ms, OverallIterations: 4, TraceHistogramMax: 2, EmptinessCheckTime: 10.2ms, AutomataDifference: 392.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 133.5ms, InitialAbstractionConstructionTime: 8.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 100 SDtfs, 28 SDslu, 200 SDs, 0 SdLazy, 70 SolverSat, 10 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 223.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 86 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 132.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=2, InterpolantAutomatonStates: 18, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 53.4ms AutomataMinimizationTime, 4 MinimizatonAttempts, 3 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 11 LocationsWithAnnotation, 18 PreInvPairs, 24 NumberOfFragments, 115 HoareAnnotationTreeSize, 18 FomulaSimplifications, 37 FormulaSimplificationTreeSizeReduction, 41.4ms HoareSimplificationTime, 11 FomulaSimplificationsInter, 184 FormulaSimplificationTreeSizeReductionInter, 84.7ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 63.6ms SsaConstructionTime, 128.9ms SatisfiabilityAnalysisTime, 576.6ms InterpolantComputationTime, 100 NumberOfCodeBlocks, 100 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 96 ConstructedInterpolants, 1 QuantifiedInterpolants, 230 SizeOfPredicates, 5 NumberOfNonLiveVariables, 395 ConjunctsInSsa, 22 ConjunctsInUnsatCore, 4 InterpolantComputations, 3 PerfectInterpolantSequences, 17/18 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: !(\old(counter) <= 0) || x * z + 1 == x + y RESULT: Ultimate proved your program to be correct! Received shutdown request...