/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/loop-new/count_by_1_variant.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 12:34:59,945 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 12:34:59,946 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 12:34:59,963 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 12:34:59,970 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 12:34:59,971 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 12:34:59,971 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 12:34:59,972 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 12:34:59,973 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 12:34:59,973 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 12:34:59,974 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 12:34:59,975 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 12:34:59,976 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 12:34:59,977 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 12:34:59,978 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 12:34:59,978 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 12:34:59,980 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 12:34:59,985 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 12:34:59,985 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 12:34:59,986 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 12:34:59,987 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 12:35:00,000 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 12:35:00,001 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 12:35:00,001 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 12:35:00,002 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 12:35:00,002 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 12:35:00,002 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 12:35:00,002 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 12:35:00,002 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 12:35:00,002 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 12:35:00,002 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 12:35:00,002 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 12:35:00,003 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 12:35:00,003 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 12:35:00,003 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 12:35:00,003 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 12:35:00,003 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 12:35:00,003 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 12:35:00,003 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 12:35:00,003 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 12:35:00,004 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 12:35:00,004 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 12:35:00,004 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 12:35:00,004 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 12:35:00,004 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 12:35:00,004 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 12:35:00,004 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 12:35:00,005 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 12:35:00,005 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 12:35:00,005 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 12:35:00,253 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 12:35:00,280 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 12:35:00,281 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 12:35:00,282 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 12:35:00,282 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 12:35:00,283 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/count_by_1_variant.i [2021-05-02 12:35:00,324 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b4a8e4b7/d87c79a093b841539f82b57d085efa00/FLAGe96e2cbf6 [2021-05-02 12:35:00,649 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 12:35:00,649 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/count_by_1_variant.i [2021-05-02 12:35:00,654 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b4a8e4b7/d87c79a093b841539f82b57d085efa00/FLAGe96e2cbf6 [2021-05-02 12:35:01,064 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b4a8e4b7/d87c79a093b841539f82b57d085efa00 [2021-05-02 12:35:01,066 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 12:35:01,067 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 12:35:01,068 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 12:35:01,068 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 12:35:01,072 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 12:35:01,073 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 12:35:01" (1/1) ... [2021-05-02 12:35:01,074 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34df3275 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:35:01, skipping insertion in model container [2021-05-02 12:35:01,074 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 12:35:01" (1/1) ... [2021-05-02 12:35:01,078 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 12:35:01,087 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 12:35:01,192 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-new/count_by_1_variant.i[891,904] [2021-05-02 12:35:01,201 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 12:35:01,207 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 12:35:01,216 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-new/count_by_1_variant.i[891,904] [2021-05-02 12:35:01,218 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 12:35:01,228 INFO L208 MainTranslator]: Completed translation [2021-05-02 12:35:01,229 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:35:01 WrapperNode [2021-05-02 12:35:01,229 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 12:35:01,231 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 12:35:01,231 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 12:35:01,232 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 12:35:01,238 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:35:01" (1/1) ... [2021-05-02 12:35:01,240 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:35:01" (1/1) ... [2021-05-02 12:35:01,244 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:35:01" (1/1) ... [2021-05-02 12:35:01,245 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:35:01" (1/1) ... [2021-05-02 12:35:01,249 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:35:01" (1/1) ... [2021-05-02 12:35:01,251 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:35:01" (1/1) ... [2021-05-02 12:35:01,255 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:35:01" (1/1) ... [2021-05-02 12:35:01,260 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 12:35:01,261 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 12:35:01,261 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 12:35:01,261 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 12:35:01,262 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:35:01" (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 12:35:01,395 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 12:35:01,395 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 12:35:01,395 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 12:35:01,396 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 12:35:01,396 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 12:35:01,396 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 12:35:01,396 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 12:35:01,396 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 12:35:01,397 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-02 12:35:01,397 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-02 12:35:01,397 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 12:35:01,397 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 12:35:01,398 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 12:35:01,398 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 12:35:01,398 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 12:35:01,398 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 12:35:01,398 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 12:35:01,398 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 12:35:01,398 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 12:35:01,399 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 12:35:01,399 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 12:35:01,399 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 12:35:01,602 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 12:35:01,602 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 12:35:01,603 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 12:35:01 BoogieIcfgContainer [2021-05-02 12:35:01,603 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 12:35:01,604 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 12:35:01,604 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 12:35:01,606 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 12:35:01,606 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 12:35:01" (1/3) ... [2021-05-02 12:35:01,606 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ee0ce45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 12:35:01, skipping insertion in model container [2021-05-02 12:35:01,606 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:35:01" (2/3) ... [2021-05-02 12:35:01,607 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ee0ce45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 12:35:01, skipping insertion in model container [2021-05-02 12:35:01,607 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 12:35:01" (3/3) ... [2021-05-02 12:35:01,607 INFO L111 eAbstractionObserver]: Analyzing ICFG count_by_1_variant.i [2021-05-02 12:35:01,611 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 12:35:01,613 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 12:35:01,639 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 12:35:01,670 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 12:35:01,670 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 12:35:01,670 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 12:35:01,670 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 12:35:01,670 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 12:35:01,670 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 12:35:01,670 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 12:35:01,670 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 12:35:01,681 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 12:35:01,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 12:35:01,684 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:35:01,684 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:35:01,684 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:35:01,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:35:01,690 INFO L82 PathProgramCache]: Analyzing trace with hash 1307585362, now seen corresponding path program 1 times [2021-05-02 12:35:01,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:35:01,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284064345] [2021-05-02 12:35:01,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:35:01,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:35:01,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:35:01,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:35:01,936 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 12:35:01,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:35:01,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284064345] [2021-05-02 12:35:01,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284064345] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 12:35:01,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 12:35:01,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 12:35:01,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133114793] [2021-05-02 12:35:01,944 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 12:35:01,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:35:01,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 12:35:01,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 12:35:01,956 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 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 12:35:02,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:35:02,114 INFO L93 Difference]: Finished difference Result 41 states and 50 transitions. [2021-05-02 12:35:02,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 12:35:02,117 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 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 11 [2021-05-02 12:35:02,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:35:02,121 INFO L225 Difference]: With dead ends: 41 [2021-05-02 12:35:02,121 INFO L226 Difference]: Without dead ends: 22 [2021-05-02 12:35:02,123 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 148.2ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 12:35:02,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-05-02 12:35:02,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2021-05-02 12:35:02,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 14 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 12:35:02,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2021-05-02 12:35:02,144 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 11 [2021-05-02 12:35:02,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:35:02,145 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2021-05-02 12:35:02,145 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 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 12:35:02,145 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2021-05-02 12:35:02,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 12:35:02,145 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:35:02,146 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:35:02,146 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 12:35:02,146 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:35:02,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:35:02,146 INFO L82 PathProgramCache]: Analyzing trace with hash 2000663987, now seen corresponding path program 1 times [2021-05-02 12:35:02,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:35:02,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831401210] [2021-05-02 12:35:02,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:35:02,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:35:02,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:35:02,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:35:02,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-05-02 12:35:02,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:35:02,207 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 12:35:02,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:35:02,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831401210] [2021-05-02 12:35:02,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831401210] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:35:02,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417190824] [2021-05-02 12:35:02,208 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 12:35:02,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:35:02,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-02 12:35:02,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:35:02,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:02,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:02,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:02,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:02,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:02,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:02,369 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 12:35:02,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417190824] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:35:02,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:35:02,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-05-02 12:35:02,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748149531] [2021-05-02 12:35:02,371 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 12:35:02,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:35:02,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 12:35:02,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 12:35:02,372 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 12:35:02,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:35:02,503 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2021-05-02 12:35:02,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 12:35:02,504 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 18 [2021-05-02 12:35:02,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:35:02,504 INFO L225 Difference]: With dead ends: 31 [2021-05-02 12:35:02,505 INFO L226 Difference]: Without dead ends: 29 [2021-05-02 12:35:02,505 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 124.5ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-05-02 12:35:02,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-02 12:35:02,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2021-05-02 12:35:02,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 19 states have internal predecessors, (19), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 12:35:02,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2021-05-02 12:35:02,511 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 18 [2021-05-02 12:35:02,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:35:02,511 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2021-05-02 12:35:02,511 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 12:35:02,511 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2021-05-02 12:35:02,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-02 12:35:02,512 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:35:02,512 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:35:02,724 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 12:35:02,724 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:35:02,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:35:02,726 INFO L82 PathProgramCache]: Analyzing trace with hash -980227022, now seen corresponding path program 2 times [2021-05-02 12:35:02,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:35:02,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412979884] [2021-05-02 12:35:02,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:35:02,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:35:02,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:35:02,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:35:02,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-05-02 12:35:02,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:35:02,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-05-02 12:35:02,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:35:02,848 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 12:35:02,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:35:02,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412979884] [2021-05-02 12:35:02,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412979884] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:35:02,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052851252] [2021-05-02 12:35:02,848 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 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 12:35:02,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 12:35:02,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:35:02,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 12:35:02,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:35:02,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:02,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:02,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:02,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:02,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:02,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:02,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:02,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:02,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:02,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:02,951 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 12:35:02,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052851252] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:35:02,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:35:02,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-05-02 12:35:02,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488595935] [2021-05-02 12:35:02,952 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 12:35:02,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:35:02,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 12:35:02,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-02 12:35:02,953 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 12:35:03,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:35:03,120 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2021-05-02 12:35:03,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 12:35:03,121 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 25 [2021-05-02 12:35:03,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:35:03,122 INFO L225 Difference]: With dead ends: 38 [2021-05-02 12:35:03,122 INFO L226 Difference]: Without dead ends: 36 [2021-05-02 12:35:03,122 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 170.6ms TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-05-02 12:35:03,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-02 12:35:03,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2021-05-02 12:35:03,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 24 states have internal predecessors, (24), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 12:35:03,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2021-05-02 12:35:03,127 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 25 [2021-05-02 12:35:03,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:35:03,127 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2021-05-02 12:35:03,127 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 12:35:03,127 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2021-05-02 12:35:03,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 12:35:03,128 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:35:03,128 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:35:03,344 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:35:03,344 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:35:03,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:35:03,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1275869395, now seen corresponding path program 3 times [2021-05-02 12:35:03,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:35:03,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984213479] [2021-05-02 12:35:03,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:35:03,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:35:03,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:35:03,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:35:03,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-05-02 12:35:03,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:35:03,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-05-02 12:35:03,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:35:03,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-05-02 12:35:03,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:35:03,442 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 12:35:03,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:35:03,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984213479] [2021-05-02 12:35:03,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984213479] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:35:03,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485595919] [2021-05-02 12:35:03,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:35:03,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 12:35:03,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:35:03,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-02 12:35:03,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:35:03,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:03,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:03,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:03,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:03,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:03,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:03,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:03,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:35:03,587 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-05-02 12:35:03,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485595919] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:35:03,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:35:03,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-02 12:35:03,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068869264] [2021-05-02 12:35:03,588 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 12:35:03,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:35:03,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 12:35:03,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-05-02 12:35:03,589 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand has 15 states, 14 states have (on average 2.0) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-05-02 12:35:03,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:35:03,838 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2021-05-02 12:35:03,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 12:35:03,839 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 32 [2021-05-02 12:35:03,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:35:03,839 INFO L225 Difference]: With dead ends: 40 [2021-05-02 12:35:03,840 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 12:35:03,840 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 242.2ms TimeCoverageRelationStatistics Valid=122, Invalid=384, Unknown=0, NotChecked=0, Total=506 [2021-05-02 12:35:03,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 12:35:03,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 12:35:03,840 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 12:35:03,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 12:35:03,841 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 32 [2021-05-02 12:35:03,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:35:03,841 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 12:35:03,841 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-05-02 12:35:03,841 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 12:35:03,841 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 12:35:04,056 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:35:04,060 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-02 12:35:04,152 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 12) no Hoare annotation was computed. [2021-05-02 12:35:04,152 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 12) no Hoare annotation was computed. [2021-05-02 12:35:04,152 INFO L198 CegarLoopUtils]: For program point L12-1(line 12) no Hoare annotation was computed. [2021-05-02 12:35:04,152 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-02 12:35:04,153 INFO L194 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string0.offset| |old(#t~string0.offset)|) (= |old(#length)| |#length|) (= |#t~string1.base| |old(#t~string1.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string0.base| |old(#t~string0.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|) (= |#t~string1.offset| |old(#t~string1.offset)|)) [2021-05-02 12:35:04,153 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-02 12:35:04,153 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-02 12:35:04,153 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-02 12:35:04,153 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-02 12:35:04,153 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-02 12:35:04,153 INFO L198 CegarLoopUtils]: For program point L15(line 15) no Hoare annotation was computed. [2021-05-02 12:35:04,153 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notENTRY(lines 14 16) no Hoare annotation was computed. [2021-05-02 12:35:04,153 INFO L198 CegarLoopUtils]: For program point L15-2(lines 14 16) no Hoare annotation was computed. [2021-05-02 12:35:04,153 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 14 16) no Hoare annotation was computed. [2021-05-02 12:35:04,153 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 24 30) the Hoare annotation is: true [2021-05-02 12:35:04,154 INFO L194 CegarLoopUtils]: At program point L27(line 27) the Hoare annotation is: (and (<= main_~i~0 1000000) (not (= main_~i~0 1000000))) [2021-05-02 12:35:04,154 INFO L198 CegarLoopUtils]: For program point L27-1(lines 26 28) no Hoare annotation was computed. [2021-05-02 12:35:04,154 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 24 30) no Hoare annotation was computed. [2021-05-02 12:35:04,154 INFO L194 CegarLoopUtils]: At program point L26-2(lines 26 28) the Hoare annotation is: (< main_~i~0 1000001) [2021-05-02 12:35:04,154 INFO L198 CegarLoopUtils]: For program point L26-3(lines 26 28) no Hoare annotation was computed. [2021-05-02 12:35:04,154 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 24 30) no Hoare annotation was computed. [2021-05-02 12:35:04,154 INFO L198 CegarLoopUtils]: For program point L18-2(lines 17 22) no Hoare annotation was computed. [2021-05-02 12:35:04,154 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 17 22) the Hoare annotation is: true [2021-05-02 12:35:04,154 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 17 22) no Hoare annotation was computed. [2021-05-02 12:35:04,154 INFO L198 CegarLoopUtils]: For program point L19(line 19) no Hoare annotation was computed. [2021-05-02 12:35:04,154 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2021-05-02 12:35:04,154 INFO L198 CegarLoopUtils]: For program point L18(lines 18 20) no Hoare annotation was computed. [2021-05-02 12:35:04,162 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 12:35:04 BoogieIcfgContainer [2021-05-02 12:35:04,162 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 12:35:04,163 INFO L168 Benchmark]: Toolchain (without parser) took 3096.07 ms. Allocated memory was 181.4 MB in the beginning and 218.1 MB in the end (delta: 36.7 MB). Free memory was 147.5 MB in the beginning and 171.5 MB in the end (delta: -24.0 MB). Peak memory consumption was 14.0 MB. Max. memory is 8.0 GB. [2021-05-02 12:35:04,163 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 181.4 MB. Free memory is still 164.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 12:35:04,163 INFO L168 Benchmark]: CACSL2BoogieTranslator took 161.01 ms. Allocated memory is still 181.4 MB. Free memory was 147.3 MB in the beginning and 137.5 MB in the end (delta: 9.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-05-02 12:35:04,163 INFO L168 Benchmark]: Boogie Preprocessor took 29.51 ms. Allocated memory is still 181.4 MB. Free memory was 137.3 MB in the beginning and 136.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 12:35:04,163 INFO L168 Benchmark]: RCFGBuilder took 341.96 ms. Allocated memory is still 181.4 MB. Free memory was 136.0 MB in the beginning and 151.9 MB in the end (delta: -15.9 MB). Peak memory consumption was 4.3 MB. Max. memory is 8.0 GB. [2021-05-02 12:35:04,164 INFO L168 Benchmark]: TraceAbstraction took 2558.70 ms. Allocated memory was 181.4 MB in the beginning and 218.1 MB in the end (delta: 36.7 MB). Free memory was 151.3 MB in the beginning and 171.5 MB in the end (delta: -20.1 MB). Peak memory consumption was 18.1 MB. Max. memory is 8.0 GB. [2021-05-02 12:35:04,164 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 181.4 MB. Free memory is still 164.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 161.01 ms. Allocated memory is still 181.4 MB. Free memory was 147.3 MB in the beginning and 137.5 MB in the end (delta: 9.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 29.51 ms. Allocated memory is still 181.4 MB. Free memory was 137.3 MB in the beginning and 136.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 341.96 ms. Allocated memory is still 181.4 MB. Free memory was 136.0 MB in the beginning and 151.9 MB in the end (delta: -15.9 MB). Peak memory consumption was 4.3 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2558.70 ms. Allocated memory was 181.4 MB in the beginning and 218.1 MB in the end (delta: 36.7 MB). Free memory was 151.3 MB in the beginning and 171.5 MB in the end (delta: -20.1 MB). Peak memory consumption was 18.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 19]: 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, 27 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2390.5ms, OverallIterations: 4, TraceHistogramMax: 4, EmptinessCheckTime: 7.2ms, AutomataDifference: 733.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 93.0ms, InitialAbstractionConstructionTime: 7.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 38 SDtfs, 98 SDslu, 94 SDs, 0 SdLazy, 235 SolverSat, 74 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 181.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 143 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 685.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=35occurred in iteration=3, InterpolantAutomatonStates: 35, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 23.8ms AutomataMinimizationTime, 4 MinimizatonAttempts, 3 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 7 LocationsWithAnnotation, 12 PreInvPairs, 23 NumberOfFragments, 40 HoareAnnotationTreeSize, 12 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 27.0ms HoareSimplificationTime, 7 FomulaSimplificationsInter, 410 FormulaSimplificationTreeSizeReductionInter, 59.9ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 32.2ms SsaConstructionTime, 80.9ms SatisfiabilityAnalysisTime, 700.6ms InterpolantComputationTime, 161 NumberOfCodeBlocks, 154 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 154 ConstructedInterpolants, 0 QuantifiedInterpolants, 386 SizeOfPredicates, 5 NumberOfNonLiveVariables, 273 ConjunctsInSsa, 31 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 69/104 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: 26]: Loop Invariant Derived loop invariant: i < 1000001 RESULT: Ultimate proved your program to be correct! Received shutdown request...