/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/hard-u.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 13:45:32,161 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 13:45:32,163 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 13:45:32,194 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 13:45:32,212 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 13:45:32,213 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 13:45:32,214 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 13:45:32,215 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 13:45:32,217 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 13:45:32,218 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 13:45:32,219 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 13:45:32,224 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 13:45:32,227 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 13:45:32,227 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 13:45:32,228 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 13:45:32,228 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 13:45:32,229 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 13:45:32,234 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 13:45:32,234 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 13:45:32,235 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 13:45:32,235 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-02 13:45:32,248 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 13:45:32,249 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 13:45:32,250 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 13:45:32,250 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 13:45:32,250 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 13:45:32,250 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 13:45:32,250 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 13:45:32,250 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 13:45:32,250 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 13:45:32,250 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 13:45:32,250 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 13:45:32,250 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 13:45:32,250 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 13:45:32,251 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 13:45:32,251 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 13:45:32,251 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 13:45:32,251 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 13:45:32,251 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 13:45:32,251 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 13:45:32,251 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 13:45:32,251 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 13:45:32,251 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 13:45:32,251 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 13:45:32,252 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 13:45:32,252 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 13:45:32,252 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 13:45:32,252 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 13:45:32,252 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 13:45:32,252 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 13:45:32,488 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 13:45:32,519 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 13:45:32,521 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 13:45:32,522 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 13:45:32,522 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 13:45:32,523 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/hard-u.c [2021-05-02 13:45:32,572 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/594728c58/954e0c1b16ea4e9a943ce4284c9cee98/FLAGfcc04fad7 [2021-05-02 13:45:32,969 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 13:45:32,970 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/hard-u.c [2021-05-02 13:45:32,975 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/594728c58/954e0c1b16ea4e9a943ce4284c9cee98/FLAGfcc04fad7 [2021-05-02 13:45:33,001 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/594728c58/954e0c1b16ea4e9a943ce4284c9cee98 [2021-05-02 13:45:33,003 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 13:45:33,004 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 13:45:33,005 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 13:45:33,005 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 13:45:33,008 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 13:45:33,008 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 01:45:33" (1/1) ... [2021-05-02 13:45:33,009 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ba1bdc2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:45:33, skipping insertion in model container [2021-05-02 13:45:33,009 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 01:45:33" (1/1) ... [2021-05-02 13:45:33,013 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 13:45:33,026 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 13:45:33,119 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/hard-u.c[545,558] [2021-05-02 13:45:33,128 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 13:45:33,152 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 13:45:33,173 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/hard-u.c[545,558] [2021-05-02 13:45:33,195 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 13:45:33,204 INFO L208 MainTranslator]: Completed translation [2021-05-02 13:45:33,205 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:45:33 WrapperNode [2021-05-02 13:45:33,205 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 13:45:33,206 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 13:45:33,206 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 13:45:33,207 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 13:45:33,214 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:45:33" (1/1) ... [2021-05-02 13:45:33,214 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:45:33" (1/1) ... [2021-05-02 13:45:33,227 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:45:33" (1/1) ... [2021-05-02 13:45:33,228 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:45:33" (1/1) ... [2021-05-02 13:45:33,242 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:45:33" (1/1) ... [2021-05-02 13:45:33,245 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:45:33" (1/1) ... [2021-05-02 13:45:33,246 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:45:33" (1/1) ... [2021-05-02 13:45:33,247 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 13:45:33,247 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 13:45:33,247 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 13:45:33,248 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 13:45:33,248 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:45:33" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 13:45:33,322 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 13:45:33,322 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 13:45:33,322 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 13:45:33,322 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 13:45:33,322 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 13:45:33,323 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 13:45:33,323 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 13:45:33,323 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 13:45:33,323 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 13:45:33,323 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 13:45:33,323 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-02 13:45:33,323 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 13:45:33,324 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 13:45:33,324 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 13:45:33,324 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 13:45:33,324 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 13:45:33,325 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 13:45:33,325 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 13:45:33,325 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 13:45:33,325 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 13:45:33,568 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 13:45:33,569 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 13:45:33,578 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 01:45:33 BoogieIcfgContainer [2021-05-02 13:45:33,578 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 13:45:33,579 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 13:45:33,579 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 13:45:33,581 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 13:45:33,581 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 01:45:33" (1/3) ... [2021-05-02 13:45:33,587 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@625ed796 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 01:45:33, skipping insertion in model container [2021-05-02 13:45:33,587 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:45:33" (2/3) ... [2021-05-02 13:45:33,587 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@625ed796 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 01:45:33, skipping insertion in model container [2021-05-02 13:45:33,587 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 01:45:33" (3/3) ... [2021-05-02 13:45:33,588 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-u.c [2021-05-02 13:45:33,592 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 13:45:33,595 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 13:45:33,606 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 13:45:33,621 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 13:45:33,621 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 13:45:33,621 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 13:45:33,621 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 13:45:33,622 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 13:45:33,622 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 13:45:33,622 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 13:45:33,622 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 13:45:33,632 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 13:45:33,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 13:45:33,636 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:45:33,636 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:45:33,636 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:45:33,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:45:33,640 INFO L82 PathProgramCache]: Analyzing trace with hash -977830905, now seen corresponding path program 1 times [2021-05-02 13:45:33,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:45:33,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578545802] [2021-05-02 13:45:33,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:45:33,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:45:33,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:45:33,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:45:33,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 13:45:33,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:45:33,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:45:33,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:45:33,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578545802] [2021-05-02 13:45:33,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578545802] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 13:45:33,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 13:45:33,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 13:45:33,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468776047] [2021-05-02 13:45:33,890 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 13:45:33,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:45:33,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 13:45:33,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 13:45:33,902 INFO L87 Difference]: Start difference. First operand has 35 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 13:45:34,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:45:34,051 INFO L93 Difference]: Finished difference Result 61 states and 95 transitions. [2021-05-02 13:45:34,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 13:45:34,053 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-02 13:45:34,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:45:34,060 INFO L225 Difference]: With dead ends: 61 [2021-05-02 13:45:34,061 INFO L226 Difference]: Without dead ends: 30 [2021-05-02 13:45:34,063 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 53.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 13:45:34,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-05-02 13:45:34,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-05-02 13:45:34,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 13:45:34,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2021-05-02 13:45:34,095 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 17 [2021-05-02 13:45:34,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:45:34,095 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2021-05-02 13:45:34,095 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 13:45:34,095 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2021-05-02 13:45:34,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 13:45:34,096 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:45:34,096 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:45:34,096 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 13:45:34,096 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:45:34,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:45:34,097 INFO L82 PathProgramCache]: Analyzing trace with hash -297772535, now seen corresponding path program 1 times [2021-05-02 13:45:34,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:45:34,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827083877] [2021-05-02 13:45:34,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:45:34,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:45:34,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:45:34,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:45:34,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 13:45:34,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:45:34,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:45:34,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:45:34,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827083877] [2021-05-02 13:45:34,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827083877] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 13:45:34,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 13:45:34,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 13:45:34,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362491340] [2021-05-02 13:45:34,190 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 13:45:34,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:45:34,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 13:45:34,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 13:45:34,190 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 13:45:34,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:45:34,477 INFO L93 Difference]: Finished difference Result 43 states and 55 transitions. [2021-05-02 13:45:34,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 13:45:34,477 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-02 13:45:34,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:45:34,478 INFO L225 Difference]: With dead ends: 43 [2021-05-02 13:45:34,478 INFO L226 Difference]: Without dead ends: 41 [2021-05-02 13:45:34,479 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 125.4ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 13:45:34,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-02 13:45:34,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 34. [2021-05-02 13:45:34,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 13:45:34,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2021-05-02 13:45:34,486 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 17 [2021-05-02 13:45:34,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:45:34,488 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2021-05-02 13:45:34,489 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 13:45:34,489 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2021-05-02 13:45:34,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 13:45:34,490 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:45:34,490 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:45:34,491 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 13:45:34,492 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:45:34,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:45:34,494 INFO L82 PathProgramCache]: Analyzing trace with hash -1294462534, now seen corresponding path program 1 times [2021-05-02 13:45:34,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:45:34,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799448800] [2021-05-02 13:45:34,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:45:34,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:45:34,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:45:34,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:45:34,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 13:45:34,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:45:34,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-05-02 13:45:34,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:45:34,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:45:34,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:45:34,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799448800] [2021-05-02 13:45:34,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799448800] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 13:45:34,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 13:45:34,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 13:45:34,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550061665] [2021-05-02 13:45:34,593 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 13:45:34,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:45:34,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 13:45:34,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 13:45:34,594 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 13:45:34,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:45:34,835 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2021-05-02 13:45:34,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 13:45:34,836 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-02 13:45:34,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:45:34,838 INFO L225 Difference]: With dead ends: 47 [2021-05-02 13:45:34,838 INFO L226 Difference]: Without dead ends: 45 [2021-05-02 13:45:34,838 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 137.2ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 13:45:34,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-02 13:45:34,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 38. [2021-05-02 13:45:34,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 13:45:34,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2021-05-02 13:45:34,852 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 22 [2021-05-02 13:45:34,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:45:34,852 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2021-05-02 13:45:34,852 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 13:45:34,852 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2021-05-02 13:45:34,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-02 13:45:34,854 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:45:34,854 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:45:34,854 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-02 13:45:34,854 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:45:34,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:45:34,855 INFO L82 PathProgramCache]: Analyzing trace with hash -1449027479, now seen corresponding path program 1 times [2021-05-02 13:45:34,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:45:34,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845029216] [2021-05-02 13:45:34,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:45:34,871 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:45:34,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [909319474] [2021-05-02 13:45:34,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:45:34,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:45:34,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 13:45:34,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:45:35,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:35,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:35,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:35,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:35,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:35,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:35,145 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 13:45:35,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:45:35,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845029216] [2021-05-02 13:45:35,145 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:45:35,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909319474] [2021-05-02 13:45:35,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909319474] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 13:45:35,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 13:45:35,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 13:45:35,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143115284] [2021-05-02 13:45:35,146 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 13:45:35,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:45:35,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 13:45:35,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 13:45:35,147 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 13:45:35,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:45:35,246 INFO L93 Difference]: Finished difference Result 66 states and 84 transitions. [2021-05-02 13:45:35,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 13:45:35,246 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2021-05-02 13:45:35,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:45:35,247 INFO L225 Difference]: With dead ends: 66 [2021-05-02 13:45:35,247 INFO L226 Difference]: Without dead ends: 52 [2021-05-02 13:45:35,248 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 36.8ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 13:45:35,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-02 13:45:35,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-05-02 13:45:35,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 31 states have internal predecessors, (34), 16 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 13:45:35,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 63 transitions. [2021-05-02 13:45:35,259 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 63 transitions. Word has length 27 [2021-05-02 13:45:35,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:45:35,259 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 63 transitions. [2021-05-02 13:45:35,259 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 13:45:35,260 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 63 transitions. [2021-05-02 13:45:35,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 13:45:35,260 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:45:35,260 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:45:35,474 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:45:35,475 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:45:35,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:45:35,475 INFO L82 PathProgramCache]: Analyzing trace with hash 905213191, now seen corresponding path program 1 times [2021-05-02 13:45:35,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:45:35,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054080431] [2021-05-02 13:45:35,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:45:35,484 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:45:35,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [893229177] [2021-05-02 13:45:35,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:45:35,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:45:35,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 13:45:35,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:45:35,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:35,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:35,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:35,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:35,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:35,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:35,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:35,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:35,755 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 13:45:35,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:45:35,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054080431] [2021-05-02 13:45:35,755 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:45:35,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893229177] [2021-05-02 13:45:35,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893229177] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 13:45:35,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 13:45:35,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-02 13:45:35,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803143217] [2021-05-02 13:45:35,756 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 13:45:35,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:45:35,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 13:45:35,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 13:45:35,757 INFO L87 Difference]: Start difference. First operand 52 states and 63 transitions. Second operand has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 13:45:35,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:45:35,917 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2021-05-02 13:45:35,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 13:45:35,920 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2021-05-02 13:45:35,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:45:35,921 INFO L225 Difference]: With dead ends: 66 [2021-05-02 13:45:35,921 INFO L226 Difference]: Without dead ends: 55 [2021-05-02 13:45:35,921 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 84.8ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-02 13:45:35,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-02 13:45:35,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-05-02 13:45:35,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 33 states have (on average 1.121212121212121) internal successors, (37), 34 states have internal predecessors, (37), 13 states have call successors, (13), 9 states have call predecessors, (13), 8 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 13:45:35,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2021-05-02 13:45:35,927 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 34 [2021-05-02 13:45:35,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:45:35,927 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2021-05-02 13:45:35,928 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 13:45:35,928 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2021-05-02 13:45:35,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-02 13:45:35,928 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:45:35,928 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:45:36,129 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:45:36,129 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:45:36,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:45:36,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1576096488, now seen corresponding path program 1 times [2021-05-02 13:45:36,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:45:36,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290878600] [2021-05-02 13:45:36,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:45:36,138 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:45:36,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1524424769] [2021-05-02 13:45:36,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:45:36,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:45:36,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 13:45:36,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:45:36,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:36,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:36,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:36,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:36,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:36,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:36,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:36,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:36,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:36,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:36,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:36,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:36,390 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-02 13:45:36,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:45:36,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290878600] [2021-05-02 13:45:36,390 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:45:36,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524424769] [2021-05-02 13:45:36,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524424769] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:45:36,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:45:36,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 13:45:36,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945190479] [2021-05-02 13:45:36,391 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 13:45:36,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:45:36,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 13:45:36,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 13:45:36,392 INFO L87 Difference]: Start difference. First operand 55 states and 61 transitions. Second operand has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 13:45:36,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:45:36,580 INFO L93 Difference]: Finished difference Result 76 states and 89 transitions. [2021-05-02 13:45:36,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 13:45:36,580 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 44 [2021-05-02 13:45:36,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:45:36,581 INFO L225 Difference]: With dead ends: 76 [2021-05-02 13:45:36,581 INFO L226 Difference]: Without dead ends: 68 [2021-05-02 13:45:36,582 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 44.4ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-02 13:45:36,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-02 13:45:36,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2021-05-02 13:45:36,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 40 states have (on average 1.125) internal successors, (45), 41 states have internal predecessors, (45), 18 states have call successors, (18), 10 states have call predecessors, (18), 9 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 13:45:36,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 79 transitions. [2021-05-02 13:45:36,589 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 79 transitions. Word has length 44 [2021-05-02 13:45:36,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:45:36,589 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 79 transitions. [2021-05-02 13:45:36,589 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 13:45:36,589 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 79 transitions. [2021-05-02 13:45:36,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-02 13:45:36,590 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:45:36,590 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:45:36,794 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:45:36,794 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:45:36,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:45:36,794 INFO L82 PathProgramCache]: Analyzing trace with hash -212431496, now seen corresponding path program 1 times [2021-05-02 13:45:36,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:45:36,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646442474] [2021-05-02 13:45:36,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:45:36,806 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:45:36,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [679200996] [2021-05-02 13:45:36,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:45:36,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:45:36,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 13:45:36,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:45:36,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:36,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:36,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:36,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:36,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:36,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:37,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:37,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:37,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:37,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:37,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:37,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:37,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:37,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:37,100 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-02 13:45:37,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:45:37,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646442474] [2021-05-02 13:45:37,100 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:45:37,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679200996] [2021-05-02 13:45:37,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679200996] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:45:37,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:45:37,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 13:45:37,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258008853] [2021-05-02 13:45:37,103 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 13:45:37,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:45:37,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 13:45:37,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 13:45:37,103 INFO L87 Difference]: Start difference. First operand 68 states and 79 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-02 13:45:37,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:45:37,223 INFO L93 Difference]: Finished difference Result 81 states and 96 transitions. [2021-05-02 13:45:37,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 13:45:37,224 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 51 [2021-05-02 13:45:37,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:45:37,225 INFO L225 Difference]: With dead ends: 81 [2021-05-02 13:45:37,225 INFO L226 Difference]: Without dead ends: 79 [2021-05-02 13:45:37,226 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 50.0ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-02 13:45:37,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-05-02 13:45:37,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2021-05-02 13:45:37,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 48 states have internal predecessors, (53), 21 states have call successors, (21), 11 states have call predecessors, (21), 10 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-02 13:45:37,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 93 transitions. [2021-05-02 13:45:37,243 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 93 transitions. Word has length 51 [2021-05-02 13:45:37,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:45:37,244 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 93 transitions. [2021-05-02 13:45:37,244 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-02 13:45:37,244 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 93 transitions. [2021-05-02 13:45:37,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-02 13:45:37,250 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:45:37,250 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:45:37,464 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:45:37,465 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:45:37,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:45:37,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1230656439, now seen corresponding path program 2 times [2021-05-02 13:45:37,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:45:37,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522813380] [2021-05-02 13:45:37,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:45:37,478 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:45:37,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [408646536] [2021-05-02 13:45:37,478 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:45:37,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:45:37,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:45:37,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-02 13:45:37,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:45:37,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:37,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:37,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:37,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:37,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:37,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:37,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:37,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:37,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:37,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:37,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:37,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:37,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:37,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:37,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:37,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:37,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:37,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:37,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:37,973 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 35 proven. 30 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-05-02 13:45:37,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:45:37,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522813380] [2021-05-02 13:45:37,973 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:45:37,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408646536] [2021-05-02 13:45:37,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408646536] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:45:37,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:45:37,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 13:45:37,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601540079] [2021-05-02 13:45:37,974 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 13:45:37,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:45:37,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 13:45:37,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-05-02 13:45:37,975 INFO L87 Difference]: Start difference. First operand 78 states and 93 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 10 states have internal predecessors, (21), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 13:45:38,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:45:38,520 INFO L93 Difference]: Finished difference Result 103 states and 124 transitions. [2021-05-02 13:45:38,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 13:45:38,520 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 10 states have internal predecessors, (21), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 61 [2021-05-02 13:45:38,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:45:38,522 INFO L225 Difference]: With dead ends: 103 [2021-05-02 13:45:38,522 INFO L226 Difference]: Without dead ends: 91 [2021-05-02 13:45:38,523 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 99.1ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-05-02 13:45:38,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-05-02 13:45:38,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2021-05-02 13:45:38,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 52 states have (on average 1.1538461538461537) internal successors, (60), 55 states have internal predecessors, (60), 26 states have call successors, (26), 12 states have call predecessors, (26), 11 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-02 13:45:38,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 110 transitions. [2021-05-02 13:45:38,530 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 110 transitions. Word has length 61 [2021-05-02 13:45:38,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:45:38,531 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 110 transitions. [2021-05-02 13:45:38,531 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 10 states have internal predecessors, (21), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 13:45:38,531 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 110 transitions. [2021-05-02 13:45:38,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-02 13:45:38,531 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:45:38,531 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:45:38,737 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:45:38,738 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:45:38,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:45:38,738 INFO L82 PathProgramCache]: Analyzing trace with hash 1615471943, now seen corresponding path program 1 times [2021-05-02 13:45:38,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:45:38,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902491216] [2021-05-02 13:45:38,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:45:38,760 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:45:38,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [376513243] [2021-05-02 13:45:38,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:45:39,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:45:39,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-02 13:45:39,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:45:39,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:39,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:39,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:39,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:39,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:39,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:39,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:39,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:39,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:39,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:39,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:39,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:39,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:39,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:39,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:39,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:39,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:39,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:39,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:39,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:39,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:39,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:39,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:39,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:39,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:39,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:45:39,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:55:03,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:55:03,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902491216] [2021-05-02 13:55:03,115 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:55:03,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376513243] [2021-05-02 13:55:03,115 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: -1072721305 [2021-05-02 13:55:03,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-05-02 13:55:03,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-05-02 13:55:03,115 ERROR L212 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2021-05-02 13:55:03,115 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-02 13:55:03,319 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:55:03,329 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-05-02 13:55:03,329 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 01:55:03 BoogieIcfgContainer [2021-05-02 13:55:03,329 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 13:55:03,329 INFO L168 Benchmark]: Toolchain (without parser) took 570325.88 ms. Allocated memory was 189.8 MB in the beginning and 7.1 GB in the end (delta: 6.9 GB). Free memory was 153.3 MB in the beginning and 5.8 GB in the end (delta: -5.6 GB). Peak memory consumption was 5.4 GB. Max. memory is 8.0 GB. [2021-05-02 13:55:03,330 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 189.8 MB. Free memory was 169.8 MB in the beginning and 169.7 MB in the end (delta: 106.6 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 13:55:03,330 INFO L168 Benchmark]: CACSL2BoogieTranslator took 200.59 ms. Allocated memory is still 189.8 MB. Free memory was 153.0 MB in the beginning and 171.6 MB in the end (delta: -18.5 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-05-02 13:55:03,330 INFO L168 Benchmark]: Boogie Preprocessor took 40.84 ms. Allocated memory is still 189.8 MB. Free memory was 171.6 MB in the beginning and 169.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 13:55:03,330 INFO L168 Benchmark]: RCFGBuilder took 330.47 ms. Allocated memory is still 189.8 MB. Free memory was 169.9 MB in the beginning and 154.6 MB in the end (delta: 15.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-02 13:55:03,330 INFO L168 Benchmark]: TraceAbstraction took 569750.02 ms. Allocated memory was 189.8 MB in the beginning and 7.1 GB in the end (delta: 6.9 GB). Free memory was 153.9 MB in the beginning and 5.8 GB in the end (delta: -5.6 GB). Peak memory consumption was 5.4 GB. Max. memory is 8.0 GB. [2021-05-02 13:55:03,330 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 189.8 MB. Free memory was 169.8 MB in the beginning and 169.7 MB in the end (delta: 106.6 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 200.59 ms. Allocated memory is still 189.8 MB. Free memory was 153.0 MB in the beginning and 171.6 MB in the end (delta: -18.5 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 40.84 ms. Allocated memory is still 189.8 MB. Free memory was 171.6 MB in the beginning and 169.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 330.47 ms. Allocated memory is still 189.8 MB. Free memory was 169.9 MB in the beginning and 154.6 MB in the end (delta: 15.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 569750.02 ms. Allocated memory was 189.8 MB in the beginning and 7.1 GB in the end (delta: 6.9 GB). Free memory was 153.9 MB in the beginning and 5.8 GB in the end (delta: -5.6 GB). Peak memory consumption was 5.4 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 17]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L23] unsigned int A, B; [L24] unsigned int r, d, p, q; [L25] A = __VERIFIER_nondet_unsigned_int() [L26] B = __VERIFIER_nondet_unsigned_int() [L27] CALL assume_abort_if_not(B >= 1) [L12] COND FALSE !(!cond) [L27] RET assume_abort_if_not(B >= 1) [L29] r = A [L30] d = B [L31] p = 1 [L32] q = 0 [L34] COND TRUE 1 [L35] CALL __VERIFIER_assert(q == 0) [L15] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(q == 0) [L36] CALL __VERIFIER_assert(r == A) [L15] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(r == A) [L37] CALL __VERIFIER_assert(d == B * p) [L15] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(d == B * p) [L38] COND FALSE !(!(r >= d)) [L40] d = 2 * d [L41] p = 2 * p [L34] COND TRUE 1 [L35] CALL __VERIFIER_assert(q == 0) [L15] COND FALSE !(!(cond)) [L35] RET __VERIFIER_assert(q == 0) [L36] CALL __VERIFIER_assert(r == A) [L15] COND FALSE !(!(cond)) [L36] RET __VERIFIER_assert(r == A) [L37] CALL __VERIFIER_assert(d == B * p) [L15] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(d == B * p) [L38] COND TRUE !(r >= d) [L44] COND TRUE 1 [L45] CALL __VERIFIER_assert(A == q*B + r) [L15] COND FALSE !(!(cond)) [L45] RET __VERIFIER_assert(A == q*B + r) [L46] CALL __VERIFIER_assert(d == B*p) [L15] COND FALSE !(!(cond)) [L46] RET __VERIFIER_assert(d == B*p) [L48] COND FALSE !(!(p != 1)) [L50] d = d / 2 [L51] p = p / 2 [L52] COND TRUE r >= d [L53] r = r - d [L54] q = q + p [L44] COND TRUE 1 [L45] CALL __VERIFIER_assert(A == q*B + r) [L15] COND TRUE !(cond) [L17] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 38 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 569700.3ms, OverallIterations: 9, TraceHistogramMax: 9, EmptinessCheckTime: 17.2ms, AutomataDifference: 1835.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 272 SDtfs, 207 SDslu, 931 SDs, 0 SdLazy, 914 SolverSat, 134 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1118.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 259 GetRequests, 192 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 631.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=90occurred in iteration=8, InterpolantAutomatonStates: 64, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 90.4ms AutomataMinimizationTime, 8 MinimizatonAttempts, 16 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 50.6ms SsaConstructionTime, 473.4ms SatisfiabilityAnalysisTime, 1278.4ms InterpolantComputationTime, 273 NumberOfCodeBlocks, 273 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 265 ConstructedInterpolants, 0 QuantifiedInterpolants, 1088 SizeOfPredicates, 14 NumberOfNonLiveVariables, 749 ConjunctsInSsa, 105 ConjunctsInUnsatCore, 8 InterpolantComputations, 5 PerfectInterpolantSequences, 261/300 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...