/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/cohendiv-ll_unwindbound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 14:07:16,977 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 14:07:16,980 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 14:07:17,009 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 14:07:17,024 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 14:07:17,026 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 14:07:17,027 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 14:07:17,028 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 14:07:17,030 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 14:07:17,030 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 14:07:17,032 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 14:07:17,036 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 14:07:17,037 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 14:07:17,037 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 14:07:17,038 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 14:07:17,040 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 14:07:17,044 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 14:07:17,051 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 14:07:17,052 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 14:07:17,053 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 14:07:17,053 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 14:07:17,098 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 14:07:17,098 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 14:07:17,100 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 14:07:17,101 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 14:07:17,101 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 14:07:17,101 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 14:07:17,101 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 14:07:17,101 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 14:07:17,101 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 14:07:17,101 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 14:07:17,102 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 14:07:17,102 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 14:07:17,102 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 14:07:17,102 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 14:07:17,103 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 14:07:17,103 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 14:07:17,103 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 14:07:17,103 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 14:07:17,103 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 14:07:17,103 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 14:07:17,103 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 14:07:17,104 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 14:07:17,104 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 14:07:17,104 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 14:07:17,104 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 14:07:17,104 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 14:07:17,104 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 14:07:17,104 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 14:07:17,104 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 14:07:17,391 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 14:07:17,410 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 14:07:17,413 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 14:07:17,413 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 14:07:17,414 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 14:07:17,415 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_unwindbound2.c [2021-05-02 14:07:17,504 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3fe5858d/b16de5c0d65c49ab8c84d1f95cfc9989/FLAGa4998dacc [2021-05-02 14:07:17,802 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 14:07:17,802 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_unwindbound2.c [2021-05-02 14:07:17,807 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3fe5858d/b16de5c0d65c49ab8c84d1f95cfc9989/FLAGa4998dacc [2021-05-02 14:07:18,237 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3fe5858d/b16de5c0d65c49ab8c84d1f95cfc9989 [2021-05-02 14:07:18,240 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 14:07:18,241 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 14:07:18,244 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 14:07:18,244 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 14:07:18,247 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 14:07:18,247 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 02:07:18" (1/1) ... [2021-05-02 14:07:18,248 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1edb67ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:07:18, skipping insertion in model container [2021-05-02 14:07:18,248 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 02:07:18" (1/1) ... [2021-05-02 14:07:18,254 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 14:07:18,266 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 14:07:18,352 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/cohendiv-ll_unwindbound2.c[576,589] [2021-05-02 14:07:18,362 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 14:07:18,367 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 14:07:18,404 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/cohendiv-ll_unwindbound2.c[576,589] [2021-05-02 14:07:18,420 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 14:07:18,446 INFO L208 MainTranslator]: Completed translation [2021-05-02 14:07:18,446 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:07:18 WrapperNode [2021-05-02 14:07:18,446 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 14:07:18,447 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 14:07:18,447 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 14:07:18,447 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 14:07:18,455 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:07:18" (1/1) ... [2021-05-02 14:07:18,456 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:07:18" (1/1) ... [2021-05-02 14:07:18,476 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:07:18" (1/1) ... [2021-05-02 14:07:18,476 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:07:18" (1/1) ... [2021-05-02 14:07:18,486 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:07:18" (1/1) ... [2021-05-02 14:07:18,490 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:07:18" (1/1) ... [2021-05-02 14:07:18,494 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:07:18" (1/1) ... [2021-05-02 14:07:18,498 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 14:07:18,499 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 14:07:18,499 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 14:07:18,499 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 14:07:18,500 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:07:18" (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 14:07:18,663 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 14:07:18,664 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 14:07:18,664 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 14:07:18,664 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 14:07:18,664 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 14:07:18,664 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 14:07:18,664 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 14:07:18,664 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 14:07:18,665 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 14:07:18,665 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 14:07:18,665 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 14:07:18,665 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 14:07:18,666 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 14:07:18,666 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 14:07:18,667 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 14:07:18,667 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 14:07:18,667 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 14:07:18,668 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 14:07:18,668 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 14:07:18,668 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 14:07:18,890 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 14:07:18,890 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 14:07:18,891 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 02:07:18 BoogieIcfgContainer [2021-05-02 14:07:18,891 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 14:07:18,892 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 14:07:18,892 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 14:07:18,894 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 14:07:18,894 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 02:07:18" (1/3) ... [2021-05-02 14:07:18,894 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f6f200c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 02:07:18, skipping insertion in model container [2021-05-02 14:07:18,895 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:07:18" (2/3) ... [2021-05-02 14:07:18,895 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f6f200c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 02:07:18, skipping insertion in model container [2021-05-02 14:07:18,895 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 02:07:18" (3/3) ... [2021-05-02 14:07:18,896 INFO L111 eAbstractionObserver]: Analyzing ICFG cohendiv-ll_unwindbound2.c [2021-05-02 14:07:18,899 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 14:07:18,901 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 14:07:18,910 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 14:07:18,924 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 14:07:18,924 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 14:07:18,924 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 14:07:18,925 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 14:07:18,925 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 14:07:18,925 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 14:07:18,925 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 14:07:18,925 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 14:07:18,935 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 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 14:07:18,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 14:07:18,938 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:07:18,939 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 14:07:18,939 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:07:18,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:07:18,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1588022502, now seen corresponding path program 1 times [2021-05-02 14:07:18,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:07:18,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232391248] [2021-05-02 14:07:18,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:07:19,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:07:19,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 14:07:19,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:07:19,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 14:07:19,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:07:19,125 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 14:07:19,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:07:19,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232391248] [2021-05-02 14:07:19,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232391248] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:07:19,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:07:19,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 14:07:19,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711693061] [2021-05-02 14:07:19,130 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 14:07:19,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:07:19,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 14:07:19,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:07:19,139 INFO L87 Difference]: Start difference. First operand has 38 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 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 14:07:19,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:07:19,217 INFO L93 Difference]: Finished difference Result 68 states and 101 transitions. [2021-05-02 14:07:19,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 14:07:19,218 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 14:07:19,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:07:19,240 INFO L225 Difference]: With dead ends: 68 [2021-05-02 14:07:19,240 INFO L226 Difference]: Without dead ends: 34 [2021-05-02 14:07:19,242 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:07:19,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-02 14:07:19,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2021-05-02 14:07:19,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 19 states have (on average 1.263157894736842) internal successors, (24), 20 states have internal predecessors, (24), 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 14:07:19,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2021-05-02 14:07:19,267 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 17 [2021-05-02 14:07:19,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:07:19,267 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2021-05-02 14:07:19,267 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 14:07:19,267 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2021-05-02 14:07:19,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 14:07:19,268 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:07:19,268 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:07:19,268 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 14:07:19,268 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:07:19,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:07:19,269 INFO L82 PathProgramCache]: Analyzing trace with hash 766070672, now seen corresponding path program 1 times [2021-05-02 14:07:19,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:07:19,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889633463] [2021-05-02 14:07:19,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:07:19,284 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:07:19,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [146201494] [2021-05-02 14:07:19,285 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 14:07:19,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:07:19,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 14:07:19,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:07:19,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:19,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:19,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:19,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:19,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:19,537 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 14:07:19,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:07:19,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889633463] [2021-05-02 14:07:19,538 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:07:19,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146201494] [2021-05-02 14:07:19,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146201494] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:07:19,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:07:19,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 14:07:19,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321378752] [2021-05-02 14:07:19,539 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 14:07:19,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:07:19,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 14:07:19,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 14:07:19,540 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 14:07:19,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:07:19,551 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2021-05-02 14:07:19,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 14:07:19,552 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2021-05-02 14:07:19,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:07:19,553 INFO L225 Difference]: With dead ends: 42 [2021-05-02 14:07:19,553 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 14:07:19,553 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.7ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 14:07:19,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 14:07:19,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-02 14:07:19,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 22 states have internal predecessors, (26), 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 14:07:19,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2021-05-02 14:07:19,559 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 18 [2021-05-02 14:07:19,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:07:19,560 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2021-05-02 14:07:19,560 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 14:07:19,560 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2021-05-02 14:07:19,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 14:07:19,560 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:07:19,560 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:07:19,776 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 14:07:19,779 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:07:19,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:07:19,780 INFO L82 PathProgramCache]: Analyzing trace with hash 767560222, now seen corresponding path program 1 times [2021-05-02 14:07:19,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:07:19,780 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733900240] [2021-05-02 14:07:19,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:07:19,791 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:07:19,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1902486912] [2021-05-02 14:07:19,791 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 14:07:19,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:07:19,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 14:07:19,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:07:19,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:19,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:19,924 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 14:07:19,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:07:19,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733900240] [2021-05-02 14:07:19,924 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:07:19,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902486912] [2021-05-02 14:07:19,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902486912] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:07:19,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:07:19,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 14:07:19,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136104276] [2021-05-02 14:07:19,925 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 14:07:19,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:07:19,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 14:07:19,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 14:07:19,926 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 8 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 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 14:07:19,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:07:19,996 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2021-05-02 14:07:19,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 14:07:19,996 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 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 18 [2021-05-02 14:07:19,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:07:19,997 INFO L225 Difference]: With dead ends: 45 [2021-05-02 14:07:19,997 INFO L226 Difference]: Without dead ends: 43 [2021-05-02 14:07:19,997 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 44.2ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:07:19,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-02 14:07:20,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2021-05-02 14:07:20,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 26 states have internal predecessors, (29), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 14:07:20,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2021-05-02 14:07:20,004 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 18 [2021-05-02 14:07:20,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:07:20,004 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2021-05-02 14:07:20,004 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 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 14:07:20,004 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2021-05-02 14:07:20,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 14:07:20,005 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:07:20,005 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, 1] [2021-05-02 14:07:20,220 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:07:20,220 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:07:20,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:07:20,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1016228092, now seen corresponding path program 1 times [2021-05-02 14:07:20,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:07:20,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589518425] [2021-05-02 14:07:20,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:07:20,230 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:07:20,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1946315969] [2021-05-02 14:07:20,230 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 14:07:20,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:07:20,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 14:07:20,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:07:20,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:20,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:20,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:20,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:20,326 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 14:07:20,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:07:20,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589518425] [2021-05-02 14:07:20,326 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:07:20,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946315969] [2021-05-02 14:07:20,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946315969] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:07:20,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:07:20,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 14:07:20,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753737968] [2021-05-02 14:07:20,327 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 14:07:20,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:07:20,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 14:07:20,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 14:07:20,328 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:07:20,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:07:20,393 INFO L93 Difference]: Finished difference Result 58 states and 74 transitions. [2021-05-02 14:07:20,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 14:07:20,394 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-02 14:07:20,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:07:20,394 INFO L225 Difference]: With dead ends: 58 [2021-05-02 14:07:20,394 INFO L226 Difference]: Without dead ends: 55 [2021-05-02 14:07:20,395 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 30.0ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:07:20,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-02 14:07:20,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2021-05-02 14:07:20,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 32 states have (on average 1.21875) internal successors, (39), 33 states have internal predecessors, (39), 16 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-02 14:07:20,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 69 transitions. [2021-05-02 14:07:20,400 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 69 transitions. Word has length 23 [2021-05-02 14:07:20,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:07:20,401 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 69 transitions. [2021-05-02 14:07:20,401 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:07:20,401 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 69 transitions. [2021-05-02 14:07:20,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-02 14:07:20,401 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:07:20,401 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, 1, 1, 1, 1] [2021-05-02 14:07:20,612 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:07:20,613 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:07:20,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:07:20,614 INFO L82 PathProgramCache]: Analyzing trace with hash 2019703110, now seen corresponding path program 1 times [2021-05-02 14:07:20,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:07:20,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508702480] [2021-05-02 14:07:20,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:07:20,648 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:07:20,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1980957014] [2021-05-02 14:07:20,658 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 14:07:20,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:07:20,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 14:07:20,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:07:20,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:20,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:20,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:20,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:20,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:20,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:20,829 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 14:07:20,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:07:20,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508702480] [2021-05-02 14:07:20,830 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:07:20,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980957014] [2021-05-02 14:07:20,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980957014] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:07:20,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:07:20,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 14:07:20,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117265642] [2021-05-02 14:07:20,830 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 14:07:20,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:07:20,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 14:07:20,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 14:07:20,831 INFO L87 Difference]: Start difference. First operand 54 states and 69 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 14:07:20,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:07:20,901 INFO L93 Difference]: Finished difference Result 83 states and 113 transitions. [2021-05-02 14:07:20,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 14:07:20,902 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 31 [2021-05-02 14:07:20,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:07:20,903 INFO L225 Difference]: With dead ends: 83 [2021-05-02 14:07:20,903 INFO L226 Difference]: Without dead ends: 81 [2021-05-02 14:07:20,903 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 29.0ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:07:20,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-05-02 14:07:20,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 74. [2021-05-02 14:07:20,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 44 states have (on average 1.2727272727272727) internal successors, (56), 46 states have internal predecessors, (56), 23 states have call successors, (23), 7 states have call predecessors, (23), 6 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 14:07:20,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 100 transitions. [2021-05-02 14:07:20,911 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 100 transitions. Word has length 31 [2021-05-02 14:07:20,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:07:20,911 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 100 transitions. [2021-05-02 14:07:20,912 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 14:07:20,912 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 100 transitions. [2021-05-02 14:07:20,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 14:07:20,912 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:07:20,912 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:07:21,128 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:07:21,128 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:07:21,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:07:21,129 INFO L82 PathProgramCache]: Analyzing trace with hash 202176206, now seen corresponding path program 1 times [2021-05-02 14:07:21,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:07:21,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862371999] [2021-05-02 14:07:21,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:07:21,154 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:07:21,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [106758225] [2021-05-02 14:07:21,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 14:07:21,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:07:21,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 14:07:21,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:07:21,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:21,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:21,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:21,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:21,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:21,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:21,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:21,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:21,318 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 14:07:21,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:07:21,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862371999] [2021-05-02 14:07:21,318 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:07:21,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106758225] [2021-05-02 14:07:21,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106758225] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:07:21,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:07:21,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 14:07:21,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014378223] [2021-05-02 14:07:21,319 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 14:07:21,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:07:21,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 14:07:21,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 14:07:21,320 INFO L87 Difference]: Start difference. First operand 74 states and 100 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 14:07:21,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:07:21,344 INFO L93 Difference]: Finished difference Result 113 states and 153 transitions. [2021-05-02 14:07:21,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 14:07:21,344 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 34 [2021-05-02 14:07:21,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:07:21,346 INFO L225 Difference]: With dead ends: 113 [2021-05-02 14:07:21,346 INFO L226 Difference]: Without dead ends: 78 [2021-05-02 14:07:21,347 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 7.5ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 14:07:21,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-05-02 14:07:21,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-05-02 14:07:21,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 47 states have (on average 1.2340425531914894) internal successors, (58), 49 states have internal predecessors, (58), 23 states have call successors, (23), 8 states have call predecessors, (23), 7 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 14:07:21,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 102 transitions. [2021-05-02 14:07:21,354 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 102 transitions. Word has length 34 [2021-05-02 14:07:21,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:07:21,354 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 102 transitions. [2021-05-02 14:07:21,354 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 14:07:21,354 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 102 transitions. [2021-05-02 14:07:21,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 14:07:21,355 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:07:21,355 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 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 14:07:21,574 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 14:07:21,575 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:07:21,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:07:21,575 INFO L82 PathProgramCache]: Analyzing trace with hash 1813008070, now seen corresponding path program 1 times [2021-05-02 14:07:21,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:07:21,575 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622233770] [2021-05-02 14:07:21,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:07:21,585 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:07:21,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1525103252] [2021-05-02 14:07:21,585 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 14:07:21,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:07:21,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-02 14:07:21,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:07:21,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:21,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:21,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:21,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:21,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:21,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:21,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:21,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:21,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:21,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:21,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:21,799 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 14:07:21,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:07:21,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622233770] [2021-05-02 14:07:21,800 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:07:21,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525103252] [2021-05-02 14:07:21,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525103252] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:07:21,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:07:21,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 14:07:21,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939989898] [2021-05-02 14:07:21,801 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 14:07:21,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:07:21,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 14:07:21,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 14:07:21,801 INFO L87 Difference]: Start difference. First operand 78 states and 102 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 14:07:21,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:07:21,871 INFO L93 Difference]: Finished difference Result 84 states and 107 transitions. [2021-05-02 14:07:21,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 14:07:21,871 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 41 [2021-05-02 14:07:21,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:07:21,872 INFO L225 Difference]: With dead ends: 84 [2021-05-02 14:07:21,872 INFO L226 Difference]: Without dead ends: 82 [2021-05-02 14:07:21,872 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 52.2ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:07:21,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-05-02 14:07:21,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2021-05-02 14:07:21,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 50 states have (on average 1.22) internal successors, (61), 52 states have internal predecessors, (61), 23 states have call successors, (23), 9 states have call predecessors, (23), 8 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 14:07:21,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 105 transitions. [2021-05-02 14:07:21,879 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 105 transitions. Word has length 41 [2021-05-02 14:07:21,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:07:21,880 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 105 transitions. [2021-05-02 14:07:21,880 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 14:07:21,880 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 105 transitions. [2021-05-02 14:07:21,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 14:07:21,881 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:07:21,881 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 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 14:07:22,097 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:07:22,098 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:07:22,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:07:22,098 INFO L82 PathProgramCache]: Analyzing trace with hash -683043127, now seen corresponding path program 1 times [2021-05-02 14:07:22,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:07:22,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064170436] [2021-05-02 14:07:22,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:07:22,107 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:07:22,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [570778931] [2021-05-02 14:07:22,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:07:22,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:07:22,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 14:07:22,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:07:22,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:22,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:22,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:22,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:22,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:22,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:22,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:22,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:22,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:22,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:22,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:22,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:22,348 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 14:07:22,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:07:22,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064170436] [2021-05-02 14:07:22,349 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:07:22,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570778931] [2021-05-02 14:07:22,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570778931] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:07:22,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:07:22,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 14:07:22,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552903286] [2021-05-02 14:07:22,349 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 14:07:22,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:07:22,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 14:07:22,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:07:22,350 INFO L87 Difference]: Start difference. First operand 82 states and 105 transitions. Second operand has 11 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 14:07:22,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:07:22,481 INFO L93 Difference]: Finished difference Result 88 states and 110 transitions. [2021-05-02 14:07:22,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 14:07:22,481 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 47 [2021-05-02 14:07:22,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:07:22,482 INFO L225 Difference]: With dead ends: 88 [2021-05-02 14:07:22,482 INFO L226 Difference]: Without dead ends: 86 [2021-05-02 14:07:22,482 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 105.2ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-05-02 14:07:22,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-05-02 14:07:22,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2021-05-02 14:07:22,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 53 states have (on average 1.2075471698113207) internal successors, (64), 55 states have internal predecessors, (64), 23 states have call successors, (23), 10 states have call predecessors, (23), 9 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 14:07:22,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 108 transitions. [2021-05-02 14:07:22,491 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 108 transitions. Word has length 47 [2021-05-02 14:07:22,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:07:22,492 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 108 transitions. [2021-05-02 14:07:22,492 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 14:07:22,492 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 108 transitions. [2021-05-02 14:07:22,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-02 14:07:22,493 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:07:22,493 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:07:22,709 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:07:22,709 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:07:22,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:07:22,710 INFO L82 PathProgramCache]: Analyzing trace with hash -589126939, now seen corresponding path program 1 times [2021-05-02 14:07:22,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:07:22,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088024660] [2021-05-02 14:07:22,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:07:22,720 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:07:22,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [699089580] [2021-05-02 14:07:22,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:07:22,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:07:22,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 14:07:22,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:07:22,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:22,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:22,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:22,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:22,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:22,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:22,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:22,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:22,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:22,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:22,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:22,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:22,964 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-02 14:07:22,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:07:22,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088024660] [2021-05-02 14:07:22,966 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:07:22,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699089580] [2021-05-02 14:07:22,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699089580] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:07:22,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:07:22,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 14:07:22,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134233211] [2021-05-02 14:07:22,968 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 14:07:22,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:07:22,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 14:07:22,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:07:22,970 INFO L87 Difference]: Start difference. First operand 86 states and 108 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 4 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 14:07:23,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:07:23,114 INFO L93 Difference]: Finished difference Result 151 states and 189 transitions. [2021-05-02 14:07:23,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 14:07:23,115 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 4 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 50 [2021-05-02 14:07:23,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:07:23,115 INFO L225 Difference]: With dead ends: 151 [2021-05-02 14:07:23,115 INFO L226 Difference]: Without dead ends: 97 [2021-05-02 14:07:23,116 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 81.4ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-02 14:07:23,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-05-02 14:07:23,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 94. [2021-05-02 14:07:23,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 59 states have (on average 1.1694915254237288) internal successors, (69), 61 states have internal predecessors, (69), 23 states have call successors, (23), 12 states have call predecessors, (23), 11 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 14:07:23,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 113 transitions. [2021-05-02 14:07:23,125 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 113 transitions. Word has length 50 [2021-05-02 14:07:23,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:07:23,125 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 113 transitions. [2021-05-02 14:07:23,125 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 4 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 14:07:23,126 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 113 transitions. [2021-05-02 14:07:23,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-02 14:07:23,126 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:07:23,126 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:07:23,343 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-02 14:07:23,343 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:07:23,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:07:23,344 INFO L82 PathProgramCache]: Analyzing trace with hash 765609565, now seen corresponding path program 1 times [2021-05-02 14:07:23,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:07:23,344 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006488020] [2021-05-02 14:07:23,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:07:23,350 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:07:23,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1325116344] [2021-05-02 14:07:23,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:07:23,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:07:23,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 14:07:23,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:07:23,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:23,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:23,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:23,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:23,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:23,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:23,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:23,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:23,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:23,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:23,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:23,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:23,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:23,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:23,574 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-02 14:07:23,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:07:23,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006488020] [2021-05-02 14:07:23,574 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:07:23,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325116344] [2021-05-02 14:07:23,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325116344] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:07:23,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:07:23,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 14:07:23,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402046960] [2021-05-02 14:07:23,575 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 14:07:23,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:07:23,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 14:07:23,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:07:23,575 INFO L87 Difference]: Start difference. First operand 94 states and 113 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 4 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 14:07:23,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:07:23,853 INFO L93 Difference]: Finished difference Result 138 states and 177 transitions. [2021-05-02 14:07:23,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 14:07:23,854 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 4 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 58 [2021-05-02 14:07:23,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:07:23,855 INFO L225 Difference]: With dead ends: 138 [2021-05-02 14:07:23,855 INFO L226 Difference]: Without dead ends: 135 [2021-05-02 14:07:23,856 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 91.3ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-02 14:07:23,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-05-02 14:07:23,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 130. [2021-05-02 14:07:23,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 80 states have (on average 1.2) internal successors, (96), 82 states have internal predecessors, (96), 36 states have call successors, (36), 14 states have call predecessors, (36), 13 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) [2021-05-02 14:07:23,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 166 transitions. [2021-05-02 14:07:23,879 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 166 transitions. Word has length 58 [2021-05-02 14:07:23,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:07:23,880 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 166 transitions. [2021-05-02 14:07:23,880 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 4 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 14:07:23,880 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 166 transitions. [2021-05-02 14:07:23,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-02 14:07:23,881 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:07:23,881 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 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, 1, 1, 1, 1, 1, 1] [2021-05-02 14:07:24,097 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:07:24,098 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:07:24,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:07:24,098 INFO L82 PathProgramCache]: Analyzing trace with hash -278875237, now seen corresponding path program 2 times [2021-05-02 14:07:24,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:07:24,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463827252] [2021-05-02 14:07:24,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:07:24,106 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:07:24,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1698975126] [2021-05-02 14:07:24,106 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:07:24,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:07:24,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:07:24,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-02 14:07:24,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:07:24,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:24,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:24,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:24,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:24,321 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-05-02 14:07:24,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:07:24,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463827252] [2021-05-02 14:07:24,321 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:07:24,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698975126] [2021-05-02 14:07:24,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698975126] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:07:24,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:07:24,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 14:07:24,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009069560] [2021-05-02 14:07:24,322 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 14:07:24,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:07:24,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 14:07:24,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 14:07:24,323 INFO L87 Difference]: Start difference. First operand 130 states and 166 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-05-02 14:07:24,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:07:24,379 INFO L93 Difference]: Finished difference Result 210 states and 272 transitions. [2021-05-02 14:07:24,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 14:07:24,380 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 74 [2021-05-02 14:07:24,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:07:24,381 INFO L225 Difference]: With dead ends: 210 [2021-05-02 14:07:24,381 INFO L226 Difference]: Without dead ends: 141 [2021-05-02 14:07:24,382 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.0ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 14:07:24,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-05-02 14:07:24,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 136. [2021-05-02 14:07:24,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 85 states have (on average 1.1764705882352942) internal successors, (100), 87 states have internal predecessors, (100), 37 states have call successors, (37), 15 states have call predecessors, (37), 13 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) [2021-05-02 14:07:24,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 171 transitions. [2021-05-02 14:07:24,391 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 171 transitions. Word has length 74 [2021-05-02 14:07:24,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:07:24,391 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 171 transitions. [2021-05-02 14:07:24,391 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-05-02 14:07:24,391 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 171 transitions. [2021-05-02 14:07:24,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-05-02 14:07:24,392 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:07:24,392 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 2, 2, 2, 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, 1, 1, 1] [2021-05-02 14:07:24,612 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:07:24,613 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:07:24,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:07:24,613 INFO L82 PathProgramCache]: Analyzing trace with hash -554329876, now seen corresponding path program 3 times [2021-05-02 14:07:24,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:07:24,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882727024] [2021-05-02 14:07:24,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:07:24,619 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:07:24,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1112784784] [2021-05-02 14:07:24,619 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:07:24,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-02 14:07:24,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:07:24,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 14:07:24,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:07:24,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:24,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:24,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:24,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:24,892 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 46 proven. 12 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2021-05-02 14:07:24,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:07:24,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882727024] [2021-05-02 14:07:24,893 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:07:24,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112784784] [2021-05-02 14:07:24,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112784784] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:07:24,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:07:24,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 14:07:24,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109758653] [2021-05-02 14:07:24,893 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 14:07:24,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:07:24,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 14:07:24,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:07:24,894 INFO L87 Difference]: Start difference. First operand 136 states and 171 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-05-02 14:07:25,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:07:25,078 INFO L93 Difference]: Finished difference Result 176 states and 224 transitions. [2021-05-02 14:07:25,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 14:07:25,079 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 82 [2021-05-02 14:07:25,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:07:25,080 INFO L225 Difference]: With dead ends: 176 [2021-05-02 14:07:25,080 INFO L226 Difference]: Without dead ends: 167 [2021-05-02 14:07:25,081 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 55.9ms TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-05-02 14:07:25,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-05-02 14:07:25,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 128. [2021-05-02 14:07:25,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 81 states have (on average 1.1604938271604939) internal successors, (94), 83 states have internal predecessors, (94), 33 states have call successors, (33), 15 states have call predecessors, (33), 13 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2021-05-02 14:07:25,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 157 transitions. [2021-05-02 14:07:25,091 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 157 transitions. Word has length 82 [2021-05-02 14:07:25,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:07:25,091 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 157 transitions. [2021-05-02 14:07:25,091 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-05-02 14:07:25,091 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 157 transitions. [2021-05-02 14:07:25,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-02 14:07:25,092 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:07:25,092 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 2, 2, 2, 2, 2, 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, 1] [2021-05-02 14:07:25,309 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-02 14:07:25,309 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:07:25,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:07:25,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1891783602, now seen corresponding path program 1 times [2021-05-02 14:07:25,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:07:25,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020021665] [2021-05-02 14:07:25,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:07:25,316 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:07:25,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [207506016] [2021-05-02 14:07:25,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:07:25,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:07:25,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 14:07:25,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:07:25,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:25,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:25,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:25,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:25,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:25,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:25,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:25,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:25,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:25,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:25,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:07:25,550 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 180 proven. 1 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-05-02 14:07:25,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:07:25,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020021665] [2021-05-02 14:07:25,551 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:07:25,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207506016] [2021-05-02 14:07:25,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207506016] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:07:25,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:07:25,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 14:07:25,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309919573] [2021-05-02 14:07:25,551 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 14:07:25,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:07:25,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 14:07:25,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 14:07:25,552 INFO L87 Difference]: Start difference. First operand 128 states and 157 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 5 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-02 14:07:25,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:07:25,590 INFO L93 Difference]: Finished difference Result 140 states and 168 transitions. [2021-05-02 14:07:25,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 14:07:25,590 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 5 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) Word has length 90 [2021-05-02 14:07:25,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:07:25,590 INFO L225 Difference]: With dead ends: 140 [2021-05-02 14:07:25,590 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 14:07:25,591 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 15.0ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-02 14:07:25,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 14:07:25,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 14:07:25,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-02 14:07:25,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 14:07:25,591 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 90 [2021-05-02 14:07:25,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:07:25,592 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 14:07:25,592 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 5 states have internal predecessors, (35), 5 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-02 14:07:25,592 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 14:07:25,592 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 14:07:25,808 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-02 14:07:25,810 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-02 14:07:38,031 WARN L205 SmtUtils]: Spent 12.12 s on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-05-02 14:07:50,171 WARN L205 SmtUtils]: Spent 12.14 s on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2021-05-02 14:08:06,078 WARN L205 SmtUtils]: Spent 15.68 s on a formula simplification. DAG size of input: 37 DAG size of output: 37 [2021-05-02 14:08:06,308 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 8) no Hoare annotation was computed. [2021-05-02 14:08:06,308 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 8) no Hoare annotation was computed. [2021-05-02 14:08:06,308 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 8) no Hoare annotation was computed. [2021-05-02 14:08:06,308 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-02 14:08:06,308 INFO L194 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= ~counter~0 |old(~counter~0)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-05-02 14:08:06,308 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-02 14:08:06,308 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-02 14:08:06,308 INFO L194 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: (and (<= ~counter~0 0) (<= 0 ~counter~0)) [2021-05-02 14:08:06,309 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-02 14:08:06,309 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-02 14:08:06,309 INFO L201 CegarLoopUtils]: At program point assume_abort_if_notENTRY(lines 11 13) the Hoare annotation is: true [2021-05-02 14:08:06,309 INFO L198 CegarLoopUtils]: For program point L12(line 12) no Hoare annotation was computed. [2021-05-02 14:08:06,309 INFO L198 CegarLoopUtils]: For program point L12-2(lines 11 13) no Hoare annotation was computed. [2021-05-02 14:08:06,309 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 11 13) no Hoare annotation was computed. [2021-05-02 14:08:06,309 INFO L194 CegarLoopUtils]: At program point L37-4(lines 37 61) the Hoare annotation is: (let ((.cse0 (<= 1 main_~y~0)) (.cse1 (= main_~b~0 (* main_~y~0 main_~a~0)))) (or (not (<= |old(~counter~0)| 0)) (and (= main_~q~0 0) (= main_~x~0 main_~r~0) .cse0) (and (= main_~x~0 (+ main_~y~0 main_~r~0)) (< main_~x~0 (* 2 main_~y~0)) .cse1 (= main_~q~0 1) (<= main_~y~0 main_~x~0)) (not (<= 0 |old(~counter~0)|)) (and .cse0 .cse1 (= main_~x~0 (+ (* (* main_~y~0 (div main_~q~0 2)) 2) main_~r~0)) (= (mod main_~q~0 2) 0)))) [2021-05-02 14:08:06,309 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 23 65) no Hoare annotation was computed. [2021-05-02 14:08:06,309 INFO L194 CegarLoopUtils]: At program point L54(line 54) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (and (<= 2 ~counter~0) (let ((.cse5 (* main_~y~0 main_~a~0))) (let ((.cse0 (= main_~q~0 0)) (.cse1 (= main_~x~0 main_~r~0)) (.cse2 (<= (* 2 .cse5) main_~r~0)) (.cse3 (<= 1 main_~y~0)) (.cse4 (= main_~b~0 .cse5))) (or (and .cse0 .cse1 .cse2 (= main_~a~0 1) .cse3 .cse4) (and (= 0 (mod main_~a~0 2)) .cse0 (= main_~b~0 (* (* main_~y~0 (div main_~a~0 2)) 2)) .cse1 .cse2 .cse3 .cse4 (<= 1 main_~r~0)))))) (not (<= 0 |old(~counter~0)|))) [2021-05-02 14:08:06,309 INFO L198 CegarLoopUtils]: For program point L54-1(line 54) no Hoare annotation was computed. [2021-05-02 14:08:06,309 INFO L194 CegarLoopUtils]: At program point L48(line 48) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (and (= main_~q~0 0) (= main_~x~0 main_~r~0) (= main_~a~0 1) (<= 1 main_~y~0) (<= main_~y~0 main_~r~0) (= main_~b~0 (* main_~y~0 main_~a~0)) (<= 2 ~counter~0)) (not (<= 0 |old(~counter~0)|))) [2021-05-02 14:08:06,309 INFO L198 CegarLoopUtils]: For program point L46-1(lines 46 58) no Hoare annotation was computed. [2021-05-02 14:08:06,310 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 23 65) no Hoare annotation was computed. [2021-05-02 14:08:06,310 INFO L194 CegarLoopUtils]: At program point L46-3(lines 46 58) the Hoare annotation is: (let ((.cse0 (= main_~q~0 0)) (.cse1 (= main_~x~0 main_~r~0)) (.cse2 (<= 1 main_~y~0)) (.cse3 (= main_~b~0 (* main_~y~0 main_~a~0)))) (or (and (= 0 (mod main_~a~0 2)) .cse0 (= main_~b~0 (* (* main_~y~0 (div main_~a~0 2)) 2)) .cse1 .cse2 .cse3 (<= 2 ~counter~0) (<= 1 main_~r~0)) (not (<= |old(~counter~0)| 0)) (and (<= 1 ~counter~0) (<= ~counter~0 1) .cse0 .cse1 (= main_~a~0 1) .cse2 (<= main_~y~0 main_~r~0) .cse3) (not (<= 0 |old(~counter~0)|)))) [2021-05-02 14:08:06,310 INFO L198 CegarLoopUtils]: For program point L46-4(lines 46 58) no Hoare annotation was computed. [2021-05-02 14:08:06,310 INFO L194 CegarLoopUtils]: At program point L38(line 38) the Hoare annotation is: (or (and (<= 1 ~counter~0) (<= ~counter~0 1) (= main_~q~0 0) (= main_~b~0 (* (* main_~y~0 (div main_~a~0 2)) 2)) (= main_~x~0 main_~r~0) (<= 1 main_~y~0) (= main_~a~0 0)) (not (<= |old(~counter~0)| 0)) (not (<= 0 |old(~counter~0)|)) (and (= main_~x~0 (+ main_~y~0 main_~r~0)) (< main_~x~0 (* 2 main_~y~0)) (= main_~a~0 1) (= main_~b~0 (* main_~y~0 main_~a~0)) (= main_~q~0 1) (<= main_~y~0 main_~x~0))) [2021-05-02 14:08:06,310 INFO L194 CegarLoopUtils]: At program point L38-1(line 38) the Hoare annotation is: (let ((.cse0 (= main_~b~0 (* main_~y~0 main_~a~0)))) (or (not (<= |old(~counter~0)| 0)) (and (= 0 (mod main_~a~0 2)) (<= 1 ~counter~0) (<= ~counter~0 1) (= main_~q~0 0) (= main_~b~0 (* (* main_~y~0 (div main_~a~0 2)) 2)) (= main_~x~0 main_~r~0) (<= 1 main_~y~0) .cse0) (and (= main_~x~0 (+ main_~y~0 main_~r~0)) (< main_~x~0 (* 2 main_~y~0)) .cse0 (= main_~q~0 1) (<= main_~y~0 main_~x~0)) (not (<= 0 |old(~counter~0)|)))) [2021-05-02 14:08:06,310 INFO L198 CegarLoopUtils]: For program point L63(line 63) no Hoare annotation was computed. [2021-05-02 14:08:06,310 INFO L194 CegarLoopUtils]: At program point L30(line 30) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (not (<= 0 |old(~counter~0)|)) (= ~counter~0 |old(~counter~0)|)) [2021-05-02 14:08:06,310 INFO L194 CegarLoopUtils]: At program point mainENTRY(lines 23 65) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (not (<= 0 |old(~counter~0)|)) (= ~counter~0 |old(~counter~0)|)) [2021-05-02 14:08:06,310 INFO L198 CegarLoopUtils]: For program point L30-1(line 30) no Hoare annotation was computed. [2021-05-02 14:08:06,310 INFO L198 CegarLoopUtils]: For program point L49(lines 46 58) no Hoare annotation was computed. [2021-05-02 14:08:06,310 INFO L194 CegarLoopUtils]: At program point L47(line 47) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (and (= main_~q~0 0) (= main_~x~0 main_~r~0) (= main_~a~0 1) (<= 1 main_~y~0) (<= main_~y~0 main_~r~0) (= main_~b~0 (* main_~y~0 main_~a~0)) (<= 2 ~counter~0)) (not (<= 0 |old(~counter~0)|))) [2021-05-02 14:08:06,310 INFO L194 CegarLoopUtils]: At program point L47-1(line 47) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (and (= main_~q~0 0) (= main_~x~0 main_~r~0) (= main_~a~0 1) (<= 1 main_~y~0) (<= main_~y~0 main_~r~0) (= main_~b~0 (* main_~y~0 main_~a~0)) (<= 2 ~counter~0)) (not (<= 0 |old(~counter~0)|))) [2021-05-02 14:08:06,311 INFO L198 CegarLoopUtils]: For program point L39(lines 37 61) no Hoare annotation was computed. [2021-05-02 14:08:06,311 INFO L198 CegarLoopUtils]: For program point L37-1(lines 37 61) no Hoare annotation was computed. [2021-05-02 14:08:06,311 INFO L194 CegarLoopUtils]: At program point L37-3(lines 37 61) the Hoare annotation is: (let ((.cse0 (<= 1 main_~y~0)) (.cse1 (= main_~b~0 (* main_~y~0 main_~a~0)))) (or (not (<= |old(~counter~0)| 0)) (and (= main_~q~0 0) (= main_~x~0 main_~r~0) (<= ~counter~0 0) .cse0 (= main_~a~0 0) (= main_~b~0 0) (<= 0 ~counter~0)) (not (<= 0 |old(~counter~0)|)) (and (<= 3 ~counter~0) .cse0 .cse1 (= main_~x~0 (+ (* (* main_~y~0 (div main_~q~0 2)) 2) main_~r~0)) (= (mod main_~q~0 2) 0)) (and (= main_~x~0 (+ main_~y~0 main_~r~0)) (< main_~x~0 (* 2 main_~y~0)) (= main_~a~0 1) .cse1 (= main_~q~0 1) (<= main_~y~0 main_~x~0)))) [2021-05-02 14:08:06,311 INFO L198 CegarLoopUtils]: For program point L16(lines 16 17) no Hoare annotation was computed. [2021-05-02 14:08:06,311 INFO L198 CegarLoopUtils]: For program point L15(lines 15 18) no Hoare annotation was computed. [2021-05-02 14:08:06,311 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 14 20) the Hoare annotation is: true [2021-05-02 14:08:06,311 INFO L198 CegarLoopUtils]: For program point L15-2(lines 14 20) no Hoare annotation was computed. [2021-05-02 14:08:06,311 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 14 20) no Hoare annotation was computed. [2021-05-02 14:08:06,312 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2021-05-02 14:08:06,343 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 02:08:06 BoogieIcfgContainer [2021-05-02 14:08:06,343 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 14:08:06,344 INFO L168 Benchmark]: Toolchain (without parser) took 48102.67 ms. Allocated memory was 190.8 MB in the beginning and 285.2 MB in the end (delta: 94.4 MB). Free memory was 155.2 MB in the beginning and 256.1 MB in the end (delta: -100.9 MB). Peak memory consumption was 147.8 MB. Max. memory is 8.0 GB. [2021-05-02 14:08:06,344 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 190.8 MB. Free memory is still 171.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 14:08:06,344 INFO L168 Benchmark]: CACSL2BoogieTranslator took 202.66 ms. Allocated memory is still 190.8 MB. Free memory was 155.0 MB in the beginning and 173.5 MB in the end (delta: -18.5 MB). Peak memory consumption was 11.0 MB. Max. memory is 8.0 GB. [2021-05-02 14:08:06,344 INFO L168 Benchmark]: Boogie Preprocessor took 51.09 ms. Allocated memory is still 190.8 MB. Free memory was 173.5 MB in the beginning and 172.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 14:08:06,344 INFO L168 Benchmark]: RCFGBuilder took 392.23 ms. Allocated memory is still 190.8 MB. Free memory was 171.7 MB in the beginning and 154.9 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-05-02 14:08:06,344 INFO L168 Benchmark]: TraceAbstraction took 47450.74 ms. Allocated memory was 190.8 MB in the beginning and 285.2 MB in the end (delta: 94.4 MB). Free memory was 154.4 MB in the beginning and 256.1 MB in the end (delta: -101.7 MB). Peak memory consumption was 147.3 MB. Max. memory is 8.0 GB. [2021-05-02 14:08:06,345 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 190.8 MB. Free memory is still 171.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 202.66 ms. Allocated memory is still 190.8 MB. Free memory was 155.0 MB in the beginning and 173.5 MB in the end (delta: -18.5 MB). Peak memory consumption was 11.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 51.09 ms. Allocated memory is still 190.8 MB. Free memory was 173.5 MB in the beginning and 172.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 392.23 ms. Allocated memory is still 190.8 MB. Free memory was 171.7 MB in the beginning and 154.9 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 47450.74 ms. Allocated memory was 190.8 MB in the beginning and 285.2 MB in the end (delta: 94.4 MB). Free memory was 154.4 MB in the beginning and 256.1 MB in the end (delta: -101.7 MB). Peak memory consumption was 147.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 41 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 6886.0ms, OverallIterations: 13, TraceHistogramMax: 12, EmptinessCheckTime: 14.0ms, AutomataDifference: 1284.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 40498.4ms, InitialAbstractionConstructionTime: 7.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 525 SDtfs, 294 SDslu, 1942 SDs, 0 SdLazy, 1175 SolverSat, 133 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 705.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 582 GetRequests, 489 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 586.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=136occurred in iteration=11, InterpolantAutomatonStates: 97, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 115.8ms AutomataMinimizationTime, 13 MinimizatonAttempts, 64 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 16 LocationsWithAnnotation, 103 PreInvPairs, 122 NumberOfFragments, 594 HoareAnnotationTreeSize, 103 FomulaSimplifications, 676 FormulaSimplificationTreeSizeReduction, 94.8ms HoareSimplificationTime, 16 FomulaSimplificationsInter, 439 FormulaSimplificationTreeSizeReductionInter, 40391.7ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 112.5ms SsaConstructionTime, 324.6ms SatisfiabilityAnalysisTime, 1672.9ms InterpolantComputationTime, 583 NumberOfCodeBlocks, 559 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 570 ConstructedInterpolants, 0 QuantifiedInterpolants, 1808 SizeOfPredicates, 32 NumberOfNonLiveVariables, 2114 ConjunctsInSsa, 178 ConjunctsInUnsatCore, 13 InterpolantComputations, 8 PerfectInterpolantSequences, 824/850 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 46]: Loop Invariant Derived loop invariant: (((((((((0 == a % 2 && q == 0) && b == y * (a / 2) * 2) && x == r) && 1 <= y) && b == y * a) && 2 <= counter) && 1 <= r) || !(\old(counter) <= 0)) || (((((((1 <= counter && counter <= 1) && q == 0) && x == r) && a == 1) && 1 <= y) && y <= r) && b == y * a)) || !(0 <= \old(counter)) - InvariantResult [Line: 37]: Loop Invariant Derived loop invariant: (((!(\old(counter) <= 0) || ((((((q == 0 && x == r) && counter <= 0) && 1 <= y) && a == 0) && b == 0) && 0 <= counter)) || !(0 <= \old(counter))) || ((((3 <= counter && 1 <= y) && b == y * a) && x == y * (q / 2) * 2 + r) && q % 2 == 0)) || (((((x == y + r && x < 2 * y) && a == 1) && b == y * a) && q == 1) && y <= x) RESULT: Ultimate proved your program to be correct! Received shutdown request...