/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/freire2_unwindbound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 15:19:38,771 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 15:19:38,773 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 15:19:38,802 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 15:19:38,821 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 15:19:38,823 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 15:19:38,824 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 15:19:38,825 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 15:19:38,827 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 15:19:38,827 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 15:19:38,830 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 15:19:38,831 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 15:19:38,832 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 15:19:38,835 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 15:19:38,836 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 15:19:38,837 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 15:19:38,840 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 15:19:38,845 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 15:19:38,845 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 15:19:38,846 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 15:19:38,846 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 15:19:38,860 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 15:19:38,860 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 15:19:38,861 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 15:19:38,861 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 15:19:38,861 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 15:19:38,862 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 15:19:38,862 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 15:19:38,862 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 15:19:38,862 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 15:19:38,862 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 15:19:38,862 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 15:19:38,862 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 15:19:38,863 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 15:19:38,863 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 15:19:38,863 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 15:19:38,863 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 15:19:38,863 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 15:19:38,863 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 15:19:38,863 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 15:19:38,863 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 15:19:38,864 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 15:19:38,864 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 15:19:38,864 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 15:19:38,864 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 15:19:38,864 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 15:19:38,864 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 15:19:38,864 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 15:19:38,865 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 15:19:38,865 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 15:19:39,072 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 15:19:39,092 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 15:19:39,094 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 15:19:39,094 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 15:19:39,096 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 15:19:39,096 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/freire2_unwindbound20.c [2021-05-02 15:19:39,145 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5133f574a/61f4dd302d494197af120e7d9b5fe828/FLAG219cfe4fe [2021-05-02 15:19:39,595 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 15:19:39,596 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/freire2_unwindbound20.c [2021-05-02 15:19:39,601 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5133f574a/61f4dd302d494197af120e7d9b5fe828/FLAG219cfe4fe [2021-05-02 15:19:39,616 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5133f574a/61f4dd302d494197af120e7d9b5fe828 [2021-05-02 15:19:39,621 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 15:19:39,623 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 15:19:39,626 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 15:19:39,626 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 15:19:39,628 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 15:19:39,629 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:19:39" (1/1) ... [2021-05-02 15:19:39,629 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43145689 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:19:39, skipping insertion in model container [2021-05-02 15:19:39,629 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:19:39" (1/1) ... [2021-05-02 15:19:39,634 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 15:19:39,645 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 15:19:39,760 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/freire2_unwindbound20.c[709,722] [2021-05-02 15:19:39,791 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:19:39,797 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 15:19:39,834 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/freire2_unwindbound20.c[709,722] [2021-05-02 15:19:39,849 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:19:39,859 INFO L208 MainTranslator]: Completed translation [2021-05-02 15:19:39,859 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:19:39 WrapperNode [2021-05-02 15:19:39,859 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 15:19:39,861 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 15:19:39,861 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 15:19:39,862 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 15:19:39,869 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:19:39" (1/1) ... [2021-05-02 15:19:39,870 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:19:39" (1/1) ... [2021-05-02 15:19:39,880 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:19:39" (1/1) ... [2021-05-02 15:19:39,880 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:19:39" (1/1) ... [2021-05-02 15:19:39,893 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:19:39" (1/1) ... [2021-05-02 15:19:39,896 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:19:39" (1/1) ... [2021-05-02 15:19:39,900 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:19:39" (1/1) ... [2021-05-02 15:19:39,904 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 15:19:39,904 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 15:19:39,905 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 15:19:39,905 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 15:19:39,905 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:19:39" (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 15:19:39,950 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 15:19:39,950 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 15:19:39,950 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 15:19:39,950 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 15:19:39,950 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 15:19:39,951 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 15:19:39,951 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 15:19:39,951 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 15:19:39,951 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 15:19:39,951 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 15:19:39,952 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_double [2021-05-02 15:19:39,952 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 15:19:39,952 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 15:19:39,952 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 15:19:39,953 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 15:19:39,953 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 15:19:39,953 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 15:19:39,953 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 15:19:39,953 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 15:19:39,953 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 15:19:40,140 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 15:19:40,141 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 15:19:40,142 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:19:40 BoogieIcfgContainer [2021-05-02 15:19:40,142 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 15:19:40,143 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 15:19:40,143 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 15:19:40,145 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 15:19:40,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 03:19:39" (1/3) ... [2021-05-02 15:19:40,146 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@330c9ee7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:19:40, skipping insertion in model container [2021-05-02 15:19:40,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:19:39" (2/3) ... [2021-05-02 15:19:40,146 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@330c9ee7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:19:40, skipping insertion in model container [2021-05-02 15:19:40,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:19:40" (3/3) ... [2021-05-02 15:19:40,147 INFO L111 eAbstractionObserver]: Analyzing ICFG freire2_unwindbound20.c [2021-05-02 15:19:40,151 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 15:19:40,153 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 15:19:40,164 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 15:19:40,177 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 15:19:40,178 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 15:19:40,178 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 15:19:40,178 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 15:19:40,178 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 15:19:40,178 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 15:19:40,178 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 15:19:40,178 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 15:19:40,188 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 15:19:40,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 15:19:40,191 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:19:40,191 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:19:40,192 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:19:40,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:19:40,196 INFO L82 PathProgramCache]: Analyzing trace with hash -643130361, now seen corresponding path program 1 times [2021-05-02 15:19:40,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:19:40,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432436619] [2021-05-02 15:19:40,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:19:40,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:19:40,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 15:19:40,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:19:40,362 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 15:19:40,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:19:40,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432436619] [2021-05-02 15:19:40,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432436619] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:19:40,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:19:40,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 15:19:40,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575910614] [2021-05-02 15:19:40,366 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 15:19:40,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:19:40,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 15:19:40,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 15:19:40,375 INFO L87 Difference]: Start difference. First operand has 26 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) 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) [2021-05-02 15:19:40,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:19:40,457 INFO L93 Difference]: Finished difference Result 47 states and 70 transitions. [2021-05-02 15:19:40,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 15:19:40,459 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 [2021-05-02 15:19:40,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:19:40,464 INFO L225 Difference]: With dead ends: 47 [2021-05-02 15:19:40,464 INFO L226 Difference]: Without dead ends: 22 [2021-05-02 15:19:40,467 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 15:19:40,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-05-02 15:19:40,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2021-05-02 15:19:40,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 15:19:40,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2021-05-02 15:19:40,496 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 11 [2021-05-02 15:19:40,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:19:40,496 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2021-05-02 15:19:40,497 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) [2021-05-02 15:19:40,497 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2021-05-02 15:19:40,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 15:19:40,498 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:19:40,498 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:19:40,498 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 15:19:40,499 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:19:40,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:19:40,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1070997212, now seen corresponding path program 1 times [2021-05-02 15:19:40,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:19:40,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224702979] [2021-05-02 15:19:40,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:19:40,528 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:19:40,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [277033177] [2021-05-02 15:19:40,529 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 15:19:40,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:19:40,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 15:19:40,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:19:40,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:40,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:40,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:40,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:40,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:19:40,698 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 15:19:40,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:19:40,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224702979] [2021-05-02 15:19:40,699 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:19:40,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277033177] [2021-05-02 15:19:40,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277033177] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:19:40,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:19:40,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 15:19:40,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220948061] [2021-05-02 15:19:40,700 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 15:19:40,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:19:40,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 15:19:40,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 15:19:40,701 INFO L87 Difference]: Start difference. First operand 21 states and 27 transitions. Second operand has 4 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) [2021-05-02 15:19:40,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:19:40,712 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2021-05-02 15:19:40,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 15:19:40,713 INFO L78 Accepts]: Start accepts. Automaton has has 4 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 [2021-05-02 15:19:40,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:19:40,713 INFO L225 Difference]: With dead ends: 32 [2021-05-02 15:19:40,713 INFO L226 Difference]: Without dead ends: 23 [2021-05-02 15:19:40,714 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.9ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 15:19:40,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-05-02 15:19:40,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-05-02 15:19:40,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 15:19:40,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2021-05-02 15:19:40,718 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 12 [2021-05-02 15:19:40,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:19:40,718 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2021-05-02 15:19:40,718 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 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) [2021-05-02 15:19:40,718 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2021-05-02 15:19:40,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 15:19:40,719 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:19:40,719 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:19:40,936 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 15:19:40,938 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:19:40,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:19:40,939 INFO L82 PathProgramCache]: Analyzing trace with hash 1072665508, now seen corresponding path program 1 times [2021-05-02 15:19:40,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:19:40,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172406404] [2021-05-02 15:19:40,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:19:40,953 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:19:40,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1318319828] [2021-05-02 15:19:40,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:19:41,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 15:19:41,001 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 15:19:41,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 15:19:41,014 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 15:19:41,036 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-02 15:19:41,036 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-02 15:19:41,240 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:19:41,257 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 03:19:41 BoogieIcfgContainer [2021-05-02 15:19:41,257 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 15:19:41,258 INFO L168 Benchmark]: Toolchain (without parser) took 1635.10 ms. Allocated memory is still 211.8 MB. Free memory was 176.2 MB in the beginning and 108.7 MB in the end (delta: 67.5 MB). Peak memory consumption was 67.3 MB. Max. memory is 8.0 GB. [2021-05-02 15:19:41,258 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 211.8 MB. Free memory is still 192.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 15:19:41,261 INFO L168 Benchmark]: CACSL2BoogieTranslator took 234.05 ms. Allocated memory is still 211.8 MB. Free memory was 176.0 MB in the beginning and 193.6 MB in the end (delta: -17.6 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-05-02 15:19:41,261 INFO L168 Benchmark]: Boogie Preprocessor took 42.94 ms. Allocated memory is still 211.8 MB. Free memory was 193.6 MB in the beginning and 192.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 15:19:41,262 INFO L168 Benchmark]: RCFGBuilder took 237.33 ms. Allocated memory is still 211.8 MB. Free memory was 192.0 MB in the beginning and 176.3 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-02 15:19:41,262 INFO L168 Benchmark]: TraceAbstraction took 1114.46 ms. Allocated memory is still 211.8 MB. Free memory was 175.8 MB in the beginning and 108.7 MB in the end (delta: 67.1 MB). Peak memory consumption was 67.1 MB. Max. memory is 8.0 GB. [2021-05-02 15:19:41,263 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 211.8 MB. Free memory is still 192.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 234.05 ms. Allocated memory is still 211.8 MB. Free memory was 176.0 MB in the beginning and 193.6 MB in the end (delta: -17.6 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 42.94 ms. Allocated memory is still 211.8 MB. Free memory was 193.6 MB in the beginning and 192.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 237.33 ms. Allocated memory is still 211.8 MB. Free memory was 192.0 MB in the beginning and 176.3 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1114.46 ms. Allocated memory is still 211.8 MB. Free memory was 175.8 MB in the beginning and 108.7 MB in the end (delta: 67.1 MB). Peak memory consumption was 67.1 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 34. Possible FailurePath: [L24] int counter = 0; VAL [\old(counter)=7, counter=0] [L26] int r; [L27] double a, x, s; [L28] a = __VERIFIER_nondet_double() [L29] x = a [L30] s = 3.25 [L31] r = 1 VAL [\old(counter)=0, a=2, counter=0, r=1, s=13/4, x=2] [L33] EXPR counter++ VAL [\old(counter)=0, a=2, counter=1, counter++=0, r=1, s=13/4, x=2] [L33] COND TRUE counter++<20 [L34] CALL __VERIFIER_assert((int)(4*s) - 12*r*r == 1) 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, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1065.1ms, OverallIterations: 3, TraceHistogramMax: 1, EmptinessCheckTime: 6.8ms, AutomataDifference: 112.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 55 SDtfs, 6 SDslu, 48 SDs, 0 SdLazy, 23 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 55.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=26occurred in iteration=0, InterpolantAutomatonStates: 7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 24.0ms AutomataMinimizationTime, 2 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 26.0ms SsaConstructionTime, 65.2ms SatisfiabilityAnalysisTime, 177.6ms InterpolantComputationTime, 35 NumberOfCodeBlocks, 35 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 21 ConstructedInterpolants, 0 QuantifiedInterpolants, 66 SizeOfPredicates, 1 NumberOfNonLiveVariables, 103 ConjunctsInSsa, 5 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...