/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/freire1_unwindbound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 02:43:53,896 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 02:43:53,898 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 02:43:53,928 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 02:43:53,947 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 02:43:53,949 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 02:43:53,950 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 02:43:53,952 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 02:43:53,954 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 02:43:53,955 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 02:43:53,957 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 02:43:53,962 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 02:43:53,963 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 02:43:53,964 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 02:43:53,965 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 02:43:53,967 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 02:43:53,973 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 02:43:54,120 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 02:43:54,121 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 02:43:54,122 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 02:43:54,126 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 02:43:54,163 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 02:43:54,163 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 02:43:54,165 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 02:43:54,166 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 02:43:54,166 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 02:43:54,166 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 02:43:54,166 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 02:43:54,166 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 02:43:54,166 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 02:43:54,167 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 02:43:54,167 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 02:43:54,167 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 02:43:54,168 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 02:43:54,168 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 02:43:54,168 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 02:43:54,168 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 02:43:54,168 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 02:43:54,168 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 02:43:54,168 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 02:43:54,169 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 02:43:54,169 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 02:43:54,169 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 02:43:54,169 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 02:43:54,169 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 02:43:54,169 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 02:43:54,170 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 02:43:54,170 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 02:43:54,170 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 02:43:54,170 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 02:43:54,461 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 02:43:54,482 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 02:43:54,484 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 02:43:54,485 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 02:43:54,486 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 02:43:54,486 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/freire1_unwindbound2.c [2021-05-06 02:43:54,540 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/adab13f53/029eed51814c4307b02b16e1d411c34d/FLAGe08a0aea7 [2021-05-06 02:43:54,869 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 02:43:54,870 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/freire1_unwindbound2.c [2021-05-06 02:43:54,875 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/adab13f53/029eed51814c4307b02b16e1d411c34d/FLAGe08a0aea7 [2021-05-06 02:43:55,266 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/adab13f53/029eed51814c4307b02b16e1d411c34d [2021-05-06 02:43:55,268 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 02:43:55,270 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 02:43:55,271 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 02:43:55,273 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 02:43:55,276 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 02:43:55,276 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 02:43:55" (1/1) ... [2021-05-06 02:43:55,277 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4de9b71f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:43:55, skipping insertion in model container [2021-05-06 02:43:55,277 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 02:43:55" (1/1) ... [2021-05-06 02:43:55,283 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 02:43:55,296 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 02:43:55,389 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/freire1_unwindbound2.c[712,725] [2021-05-06 02:43:55,407 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 02:43:55,414 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 02:43:55,426 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/freire1_unwindbound2.c[712,725] [2021-05-06 02:43:55,434 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 02:43:55,447 INFO L208 MainTranslator]: Completed translation [2021-05-06 02:43:55,448 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:43:55 WrapperNode [2021-05-06 02:43:55,448 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 02:43:55,451 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 02:43:55,451 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 02:43:55,452 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 02:43:55,483 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:43:55" (1/1) ... [2021-05-06 02:43:55,484 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:43:55" (1/1) ... [2021-05-06 02:43:55,508 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:43:55" (1/1) ... [2021-05-06 02:43:55,508 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:43:55" (1/1) ... [2021-05-06 02:43:55,522 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:43:55" (1/1) ... [2021-05-06 02:43:55,525 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:43:55" (1/1) ... [2021-05-06 02:43:55,526 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:43:55" (1/1) ... [2021-05-06 02:43:55,527 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 02:43:55,528 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 02:43:55,528 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 02:43:55,528 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 02:43:55,529 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:43:55" (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 02:43:55,592 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 02:43:55,593 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 02:43:55,593 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 02:43:55,593 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 02:43:55,593 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 02:43:55,593 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 02:43:55,593 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 02:43:55,594 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 02:43:55,594 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 02:43:55,594 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 02:43:55,594 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_double [2021-05-06 02:43:55,594 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 02:43:55,595 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 02:43:55,595 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 02:43:55,595 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 02:43:55,596 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 02:43:55,596 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 02:43:55,596 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 02:43:55,596 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 02:43:55,596 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 02:43:55,846 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 02:43:55,847 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 02:43:55,848 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 02:43:55 BoogieIcfgContainer [2021-05-06 02:43:55,848 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 02:43:55,849 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 02:43:55,849 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 02:43:55,851 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 02:43:55,852 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 02:43:55" (1/3) ... [2021-05-06 02:43:55,852 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@183e01ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 02:43:55, skipping insertion in model container [2021-05-06 02:43:55,852 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:43:55" (2/3) ... [2021-05-06 02:43:55,853 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@183e01ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 02:43:55, skipping insertion in model container [2021-05-06 02:43:55,853 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 02:43:55" (3/3) ... [2021-05-06 02:43:55,854 INFO L111 eAbstractionObserver]: Analyzing ICFG freire1_unwindbound2.c [2021-05-06 02:43:55,858 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 02:43:55,861 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 02:43:55,877 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 02:43:55,900 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 02:43:55,900 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 02:43:55,900 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 02:43:55,900 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 02:43:55,900 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 02:43:55,901 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 02:43:55,901 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 02:43:55,901 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 02:43:55,913 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 02:43:55,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-06 02:43:55,917 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:43:55,917 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:43:55,917 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:43:55,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:43:55,922 INFO L82 PathProgramCache]: Analyzing trace with hash 1665267581, now seen corresponding path program 1 times [2021-05-06 02:43:55,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:43:55,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315653995] [2021-05-06 02:43:55,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:43:56,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:43:56,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 02:43:56,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:43:56,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 02:43:56,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:43:56,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315653995] [2021-05-06 02:43:56,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315653995] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:43:56,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:43:56,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 02:43:56,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912187583] [2021-05-06 02:43:56,217 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 02:43:56,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:43:56,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 02:43:56,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 02:43:56,234 INFO L87 Difference]: Start difference. First operand has 22 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 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) [2021-05-06 02:43:56,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:43:56,322 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2021-05-06 02:43:56,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 02:43:56,324 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 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 [2021-05-06 02:43:56,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:43:56,330 INFO L225 Difference]: With dead ends: 39 [2021-05-06 02:43:56,330 INFO L226 Difference]: Without dead ends: 18 [2021-05-06 02:43:56,334 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 70.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 02:43:56,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-05-06 02:43:56,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2021-05-06 02:43:56,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 02:43:56,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-05-06 02:43:56,368 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2021-05-06 02:43:56,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:43:56,369 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-05-06 02:43:56,369 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 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) [2021-05-06 02:43:56,369 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-05-06 02:43:56,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 02:43:56,370 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:43:56,370 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:43:56,371 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 02:43:56,371 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:43:56,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:43:56,372 INFO L82 PathProgramCache]: Analyzing trace with hash -318583316, now seen corresponding path program 1 times [2021-05-06 02:43:56,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:43:56,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164284265] [2021-05-06 02:43:56,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:43:56,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:43:56,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 02:43:56,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:43:56,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 02:43:56,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:43:56,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164284265] [2021-05-06 02:43:56,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164284265] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:43:56,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:43:56,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 02:43:56,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135809657] [2021-05-06 02:43:56,554 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 02:43:56,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:43:56,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 02:43:56,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:43:56,555 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 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) [2021-05-06 02:43:56,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:43:56,703 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2021-05-06 02:43:56,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 02:43:56,705 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-06 02:43:56,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:43:56,705 INFO L225 Difference]: With dead ends: 26 [2021-05-06 02:43:56,705 INFO L226 Difference]: Without dead ends: 19 [2021-05-06 02:43:56,706 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 102.4ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:43:56,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-05-06 02:43:56,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-05-06 02:43:56,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 02:43:56,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-05-06 02:43:56,712 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 12 [2021-05-06 02:43:56,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:43:56,712 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-05-06 02:43:56,712 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 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) [2021-05-06 02:43:56,712 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-05-06 02:43:56,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 02:43:56,713 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:43:56,713 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:43:56,713 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 02:43:56,713 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:43:56,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:43:56,714 INFO L82 PathProgramCache]: Analyzing trace with hash -316795856, now seen corresponding path program 1 times [2021-05-06 02:43:56,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:43:56,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075631269] [2021-05-06 02:43:56,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:43:56,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-06 02:43:56,725 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-06 02:43:56,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-06 02:43:56,734 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-06 02:43:56,750 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-06 02:43:56,750 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-06 02:43:56,751 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-06 02:43:56,770 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 02:43:56 BoogieIcfgContainer [2021-05-06 02:43:56,770 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 02:43:56,771 INFO L168 Benchmark]: Toolchain (without parser) took 1501.49 ms. Allocated memory is still 187.7 MB. Free memory was 151.8 MB in the beginning and 99.9 MB in the end (delta: 51.9 MB). Peak memory consumption was 51.6 MB. Max. memory is 8.0 GB. [2021-05-06 02:43:56,772 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 187.7 MB. Free memory is still 168.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 02:43:56,772 INFO L168 Benchmark]: CACSL2BoogieTranslator took 177.43 ms. Allocated memory is still 187.7 MB. Free memory was 151.6 MB in the beginning and 142.0 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-06 02:43:56,773 INFO L168 Benchmark]: Boogie Preprocessor took 76.66 ms. Allocated memory is still 187.7 MB. Free memory was 141.8 MB in the beginning and 171.2 MB in the end (delta: -29.4 MB). Peak memory consumption was 3.3 MB. Max. memory is 8.0 GB. [2021-05-06 02:43:56,773 INFO L168 Benchmark]: RCFGBuilder took 320.02 ms. Allocated memory is still 187.7 MB. Free memory was 170.7 MB in the beginning and 156.0 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-06 02:43:56,774 INFO L168 Benchmark]: TraceAbstraction took 921.12 ms. Allocated memory is still 187.7 MB. Free memory was 155.4 MB in the beginning and 99.9 MB in the end (delta: 55.6 MB). Peak memory consumption was 55.6 MB. Max. memory is 8.0 GB. [2021-05-06 02:43:56,775 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 187.7 MB. Free memory is still 168.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 177.43 ms. Allocated memory is still 187.7 MB. Free memory was 151.6 MB in the beginning and 142.0 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 76.66 ms. Allocated memory is still 187.7 MB. Free memory was 141.8 MB in the beginning and 171.2 MB in the end (delta: -29.4 MB). Peak memory consumption was 3.3 MB. Max. memory is 8.0 GB. * RCFGBuilder took 320.02 ms. Allocated memory is still 187.7 MB. Free memory was 170.7 MB in the beginning and 156.0 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 921.12 ms. Allocated memory is still 187.7 MB. Free memory was 155.4 MB in the beginning and 99.9 MB in the end (delta: 55.6 MB). Peak memory consumption was 55.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 19]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of to_int at line 33, overapproximation of someBinaryArithmeticDOUBLEoperation at line 29. Possible FailurePath: [L24] int counter = 0; VAL [\old(counter)=56, counter=0] [L26] int r; [L27] double a, x; [L28] a = __VERIFIER_nondet_double() [L29] x = a / 2.0 [L30] r = 0 VAL [\old(counter)=0, a=54, counter=0, r=0] [L32] EXPR counter++ VAL [\old(counter)=0, a=54, counter=1, counter++=0, r=0] [L32] COND TRUE counter++<2 [L33] CALL __VERIFIER_assert((int)(r*r - a - r + 2*x) == 0) VAL [\old(cond)=0, \old(counter)=0, counter=1] [L17] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=1] [L19] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 852.7ms, OverallIterations: 3, TraceHistogramMax: 1, EmptinessCheckTime: 8.8ms, AutomataDifference: 266.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 8.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 38 SDtfs, 12 SDslu, 20 SDs, 0 SdLazy, 41 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 109.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 172.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred in iteration=0, InterpolantAutomatonStates: 9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 27.9ms AutomataMinimizationTime, 2 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 17.8ms SsaConstructionTime, 78.0ms SatisfiabilityAnalysisTime, 321.0ms InterpolantComputationTime, 35 NumberOfCodeBlocks, 35 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 21 ConstructedInterpolants, 0 QuantifiedInterpolants, 99 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 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 RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...