/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/ps6-ll_unwindbound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 17:14:00,963 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 17:14:00,965 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 17:14:00,995 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 17:14:01,010 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 17:14:01,011 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 17:14:01,012 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 17:14:01,013 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 17:14:01,015 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 17:14:01,015 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 17:14:01,017 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 17:14:01,021 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 17:14:01,022 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 17:14:01,022 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 17:14:01,024 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 17:14:01,026 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 17:14:01,029 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 17:14:01,059 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 17:14:01,059 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 17:14:01,060 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 17:14:01,063 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 17:14:01,090 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 17:14:01,091 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 17:14:01,093 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 17:14:01,093 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 17:14:01,093 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 17:14:01,093 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 17:14:01,093 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 17:14:01,093 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 17:14:01,093 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 17:14:01,093 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 17:14:01,094 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 17:14:01,094 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 17:14:01,094 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 17:14:01,094 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 17:14:01,094 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 17:14:01,095 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 17:14:01,095 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 17:14:01,095 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 17:14:01,095 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 17:14:01,095 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 17:14:01,095 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 17:14:01,095 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 17:14:01,095 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 17:14:01,095 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 17:14:01,096 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 17:14:01,096 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 17:14:01,096 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 17:14:01,096 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 17:14:01,096 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 17:14:01,330 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 17:14:01,341 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 17:14:01,343 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 17:14:01,343 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 17:14:01,344 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 17:14:01,344 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_unwindbound2.c [2021-05-02 17:14:01,395 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/13a7c0dbf/13957856747f4bd1aad75461e0eb5cfa/FLAG806d12007 [2021-05-02 17:14:01,731 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 17:14:01,731 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_unwindbound2.c [2021-05-02 17:14:01,735 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/13a7c0dbf/13957856747f4bd1aad75461e0eb5cfa/FLAG806d12007 [2021-05-02 17:14:01,743 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/13a7c0dbf/13957856747f4bd1aad75461e0eb5cfa [2021-05-02 17:14:01,745 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 17:14:01,746 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 17:14:01,747 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 17:14:01,747 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 17:14:01,749 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 17:14:01,750 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 05:14:01" (1/1) ... [2021-05-02 17:14:01,750 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e6b9e38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:14:01, skipping insertion in model container [2021-05-02 17:14:01,750 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 05:14:01" (1/1) ... [2021-05-02 17:14:01,754 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 17:14:01,763 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 17:14:01,854 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/ps6-ll_unwindbound2.c[458,471] [2021-05-02 17:14:01,873 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 17:14:01,879 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 17:14:01,928 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/ps6-ll_unwindbound2.c[458,471] [2021-05-02 17:14:01,935 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 17:14:01,944 INFO L208 MainTranslator]: Completed translation [2021-05-02 17:14:01,944 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:14:01 WrapperNode [2021-05-02 17:14:01,944 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 17:14:01,946 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 17:14:01,946 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 17:14:01,947 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 17:14:01,953 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:14:01" (1/1) ... [2021-05-02 17:14:01,954 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:14:01" (1/1) ... [2021-05-02 17:14:01,958 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:14:01" (1/1) ... [2021-05-02 17:14:01,958 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:14:01" (1/1) ... [2021-05-02 17:14:01,967 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:14:01" (1/1) ... [2021-05-02 17:14:01,970 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:14:01" (1/1) ... [2021-05-02 17:14:01,973 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:14:01" (1/1) ... [2021-05-02 17:14:01,978 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 17:14:01,979 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 17:14:01,979 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 17:14:01,979 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 17:14:01,979 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:14:01" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 17:14:02,042 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 17:14:02,042 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 17:14:02,042 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 17:14:02,043 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 17:14:02,043 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 17:14:02,043 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 17:14:02,043 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 17:14:02,043 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 17:14:02,044 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 17:14:02,044 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 17:14:02,044 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2021-05-02 17:14:02,044 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 17:14:02,045 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 17:14:02,045 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 17:14:02,045 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 17:14:02,045 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 17:14:02,045 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 17:14:02,045 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 17:14:02,045 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 17:14:02,046 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 17:14:02,256 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 17:14:02,257 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 17:14:02,257 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 05:14:02 BoogieIcfgContainer [2021-05-02 17:14:02,257 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 17:14:02,258 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 17:14:02,259 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 17:14:02,260 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 17:14:02,260 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 05:14:01" (1/3) ... [2021-05-02 17:14:02,261 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a7343da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 05:14:02, skipping insertion in model container [2021-05-02 17:14:02,261 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:14:01" (2/3) ... [2021-05-02 17:14:02,261 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a7343da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 05:14:02, skipping insertion in model container [2021-05-02 17:14:02,261 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 05:14:02" (3/3) ... [2021-05-02 17:14:02,262 INFO L111 eAbstractionObserver]: Analyzing ICFG ps6-ll_unwindbound2.c [2021-05-02 17:14:02,265 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 17:14:02,267 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 17:14:02,277 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 17:14:02,289 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 17:14:02,289 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 17:14:02,289 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 17:14:02,289 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 17:14:02,289 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 17:14:02,289 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 17:14:02,290 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 17:14:02,290 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 17:14:02,298 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 17:14:02,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 17:14:02,301 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:14:02,301 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 17:14:02,301 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:14:02,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:14:02,304 INFO L82 PathProgramCache]: Analyzing trace with hash 21872251, now seen corresponding path program 1 times [2021-05-02 17:14:02,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:14:02,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376119427] [2021-05-02 17:14:02,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:14:02,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:14:02,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:14:02,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:14:02,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 17:14:02,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:14:02,496 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 17:14:02,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:14:02,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376119427] [2021-05-02 17:14:02,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376119427] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 17:14:02,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 17:14:02,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 17:14:02,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234750178] [2021-05-02 17:14:02,501 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 17:14:02,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:14:02,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 17:14:02,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 17:14:02,511 INFO L87 Difference]: Start difference. First operand has 29 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) 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 17:14:02,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:14:02,600 INFO L93 Difference]: Finished difference Result 50 states and 65 transitions. [2021-05-02 17:14:02,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 17:14:02,601 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 17:14:02,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:14:02,606 INFO L225 Difference]: With dead ends: 50 [2021-05-02 17:14:02,606 INFO L226 Difference]: Without dead ends: 25 [2021-05-02 17:14:02,608 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 17:14:02,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-02 17:14:02,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2021-05-02 17:14:02,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 17:14:02,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-05-02 17:14:02,638 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 17 [2021-05-02 17:14:02,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:14:02,638 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-05-02 17:14:02,638 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 17:14:02,638 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-05-02 17:14:02,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 17:14:02,639 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:14:02,640 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 17:14:02,640 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 17:14:02,640 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:14:02,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:14:02,641 INFO L82 PathProgramCache]: Analyzing trace with hash -119968982, now seen corresponding path program 1 times [2021-05-02 17:14:02,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:14:02,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424794131] [2021-05-02 17:14:02,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:14:02,665 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:14:02,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [127421058] [2021-05-02 17:14:02,666 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 17:14:02,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:14:02,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 17:14:02,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:14:02,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:14:02,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:14:02,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:14:02,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:14:02,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:14:02,818 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 17:14:02,819 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:14:02,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424794131] [2021-05-02 17:14:02,820 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:14:02,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127421058] [2021-05-02 17:14:02,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127421058] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 17:14:02,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 17:14:02,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 17:14:02,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131006803] [2021-05-02 17:14:02,821 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 17:14:02,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:14:02,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 17:14:02,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 17:14:02,824 INFO L87 Difference]: Start difference. First operand 24 states and 27 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 17:14:02,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:14:02,834 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2021-05-02 17:14:02,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 17:14:02,834 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 17:14:02,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:14:02,835 INFO L225 Difference]: With dead ends: 34 [2021-05-02 17:14:02,835 INFO L226 Difference]: Without dead ends: 26 [2021-05-02 17:14:02,835 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.4ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 17:14:02,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-02 17:14:02,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-05-02 17:14:02,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 17:14:02,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2021-05-02 17:14:02,839 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 18 [2021-05-02 17:14:02,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:14:02,839 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2021-05-02 17:14:02,840 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 17:14:02,840 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2021-05-02 17:14:02,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 17:14:02,840 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:14:02,840 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 17:14:03,046 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 17:14:03,047 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:14:03,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:14:03,047 INFO L82 PathProgramCache]: Analyzing trace with hash -118181522, now seen corresponding path program 1 times [2021-05-02 17:14:03,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:14:03,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519583362] [2021-05-02 17:14:03,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:14:03,059 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:14:03,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2064350238] [2021-05-02 17:14:03,059 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 17:14:03,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:14:03,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 17:14:03,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:14:03,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:14:03,166 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 17:14:03,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:14:03,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519583362] [2021-05-02 17:14:03,166 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:14:03,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064350238] [2021-05-02 17:14:03,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064350238] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 17:14:03,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 17:14:03,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-02 17:14:03,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053719045] [2021-05-02 17:14:03,167 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 17:14:03,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:14:03,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 17:14:03,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 17:14:03,168 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 7 states, 7 states have (on average 1.7142857142857142) 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), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 17:14:03,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:14:03,381 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2021-05-02 17:14:03,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 17:14:03,381 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.7142857142857142) 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), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-02 17:14:03,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:14:03,382 INFO L225 Difference]: With dead ends: 36 [2021-05-02 17:14:03,382 INFO L226 Difference]: Without dead ends: 32 [2021-05-02 17:14:03,389 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 41.8ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 17:14:03,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-02 17:14:03,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-02 17:14:03,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 17:14:03,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2021-05-02 17:14:03,395 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 18 [2021-05-02 17:14:03,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:14:03,395 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2021-05-02 17:14:03,395 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 1.7142857142857142) 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), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 17:14:03,395 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2021-05-02 17:14:03,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-02 17:14:03,396 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:14:03,396 INFO L523 BasicCegarLoop]: trace histogram [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 17:14:03,614 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:14:03,614 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:14:03,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:14:03,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1364840471, now seen corresponding path program 1 times [2021-05-02 17:14:03,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:14:03,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481711720] [2021-05-02 17:14:03,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:14:03,623 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:14:03,623 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [286399462] [2021-05-02 17:14:03,623 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 17:14:03,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:14:03,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 17:14:03,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:14:03,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:14:03,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:14:03,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:14:03,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:14:03,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:14:03,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:14:03,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:14:03,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:14:03,734 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:14:03,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:14:03,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481711720] [2021-05-02 17:14:03,735 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:14:03,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286399462] [2021-05-02 17:14:03,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286399462] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:14:03,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:14:03,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 17:14:03,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344743211] [2021-05-02 17:14:03,735 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 17:14:03,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:14:03,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 17:14:03,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 17:14:03,736 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 17:14:03,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:14:03,890 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2021-05-02 17:14:03,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 17:14:03,890 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 26 [2021-05-02 17:14:03,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:14:03,891 INFO L225 Difference]: With dead ends: 42 [2021-05-02 17:14:03,891 INFO L226 Difference]: Without dead ends: 34 [2021-05-02 17:14:03,891 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 11.2ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 17:14:03,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-02 17:14:03,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-05-02 17:14:03,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 17:14:03,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2021-05-02 17:14:03,895 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 26 [2021-05-02 17:14:03,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:14:03,896 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2021-05-02 17:14:03,896 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 17:14:03,896 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2021-05-02 17:14:03,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-02 17:14:03,896 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:14:03,896 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:14:04,102 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:14:04,103 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:14:04,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:14:04,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1363053011, now seen corresponding path program 1 times [2021-05-02 17:14:04,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:14:04,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369652575] [2021-05-02 17:14:04,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:14:04,113 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:14:04,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [253163799] [2021-05-02 17:14:04,113 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 17:14:04,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:14:04,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 17:14:04,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:14:04,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:14:04,290 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:14:04,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:14:04,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369652575] [2021-05-02 17:14:04,290 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:14:04,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253163799] [2021-05-02 17:14:04,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253163799] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:14:04,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:14:04,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 17:14:04,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484974924] [2021-05-02 17:14:04,291 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 17:14:04,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:14:04,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 17:14:04,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 17:14:04,291 INFO L87 Difference]: Start difference. First operand 34 states and 37 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, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 17:14:04,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:14:04,354 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2021-05-02 17:14:04,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 17:14:04,355 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, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2021-05-02 17:14:04,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:14:04,355 INFO L225 Difference]: With dead ends: 44 [2021-05-02 17:14:04,355 INFO L226 Difference]: Without dead ends: 42 [2021-05-02 17:14:04,356 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 34.5ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-02 17:14:04,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-02 17:14:04,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2021-05-02 17:14:04,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 28 states have internal predecessors, (30), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 17:14:04,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2021-05-02 17:14:04,360 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 26 [2021-05-02 17:14:04,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:14:04,360 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2021-05-02 17:14:04,361 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, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 17:14:04,361 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2021-05-02 17:14:04,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 17:14:04,361 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:14:04,361 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:14:04,566 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:14:04,566 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:14:04,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:14:04,567 INFO L82 PathProgramCache]: Analyzing trace with hash -595737176, now seen corresponding path program 2 times [2021-05-02 17:14:04,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:14:04,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702598307] [2021-05-02 17:14:04,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:14:04,575 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:14:04,575 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [837249835] [2021-05-02 17:14:04,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:14:04,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 17:14:04,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:14:04,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 17:14:04,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:14:04,760 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 17:14:04,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:14:04,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702598307] [2021-05-02 17:14:04,761 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:14:04,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837249835] [2021-05-02 17:14:04,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837249835] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:14:04,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:14:04,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 17:14:04,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914707470] [2021-05-02 17:14:04,761 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 17:14:04,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:14:04,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 17:14:04,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 17:14:04,762 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 17:14:09,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:14:09,213 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2021-05-02 17:14:09,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 17:14:09,214 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 34 [2021-05-02 17:14:09,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:14:09,215 INFO L225 Difference]: With dead ends: 54 [2021-05-02 17:14:09,215 INFO L226 Difference]: Without dead ends: 52 [2021-05-02 17:14:09,215 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 52.2ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-02 17:14:09,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-02 17:14:09,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2021-05-02 17:14:09,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 32 states have (on average 1.1875) internal successors, (38), 35 states have internal predecessors, (38), 11 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 17:14:09,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2021-05-02 17:14:09,221 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 34 [2021-05-02 17:14:09,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:14:09,221 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2021-05-02 17:14:09,222 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 17:14:09,222 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2021-05-02 17:14:09,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-02 17:14:09,222 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:14:09,222 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:14:09,429 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 17:14:09,429 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:14:09,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:14:09,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1559147673, now seen corresponding path program 1 times [2021-05-02 17:14:09,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:14:09,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287010418] [2021-05-02 17:14:09,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:14:09,437 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:14:09,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1297767261] [2021-05-02 17:14:09,437 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 17:14:09,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:14:09,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 17:14:09,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:14:09,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:14:09,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:14:09,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:14:09,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:14:09,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:14:09,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:14:09,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:14:09,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:14:09,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:14:11,679 WARN L860 $PredicateComparison]: unable to prove that (and (<= c_main_~k~0 1) (= c_main_~y~0 1) (= (+ (* c_main_~y~0 c_main_~y~0) (* 6 (* c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0))) (+ (* 5 (* c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0)) (* 2 (* c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0)))) (< 0 c_main_~k~0)) is different from true [2021-05-02 17:14:11,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:14:11,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:14:11,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:14:11,715 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-02 17:14:11,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:14:11,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287010418] [2021-05-02 17:14:11,716 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:14:11,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297767261] [2021-05-02 17:14:11,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297767261] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:14:11,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:14:11,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 17:14:11,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290893163] [2021-05-02 17:14:11,716 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 17:14:11,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:14:11,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 17:14:11,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=108, Unknown=1, NotChecked=20, Total=156 [2021-05-02 17:14:11,717 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand has 13 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 17:14:14,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:14:14,283 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2021-05-02 17:14:14,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 17:14:14,284 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 37 [2021-05-02 17:14:14,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:14:14,285 INFO L225 Difference]: With dead ends: 57 [2021-05-02 17:14:14,286 INFO L226 Difference]: Without dead ends: 49 [2021-05-02 17:14:14,286 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 2147.7ms TimeCoverageRelationStatistics Valid=47, Invalid=196, Unknown=1, NotChecked=28, Total=272 [2021-05-02 17:14:14,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-05-02 17:14:14,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-05-02 17:14:14,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 32 states have (on average 1.15625) internal successors, (37), 34 states have internal predecessors, (37), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 17:14:14,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2021-05-02 17:14:14,293 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 37 [2021-05-02 17:14:14,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:14:14,293 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2021-05-02 17:14:14,293 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 17:14:14,294 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2021-05-02 17:14:14,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 17:14:14,294 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:14:14,294 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:14:14,504 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:14:14,505 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:14:14,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:14:14,505 INFO L82 PathProgramCache]: Analyzing trace with hash -951509150, now seen corresponding path program 1 times [2021-05-02 17:14:14,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:14:14,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102238077] [2021-05-02 17:14:14,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:14:14,513 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:14:14,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1670875973] [2021-05-02 17:14:14,513 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 17:14:14,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 17:14:14,560 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 17:14:14,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 17:14:14,574 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 17:14:14,625 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-02 17:14:14,625 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-02 17:14:14,825 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:14:14,847 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 05:14:14 BoogieIcfgContainer [2021-05-02 17:14:14,848 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 17:14:14,848 INFO L168 Benchmark]: Toolchain (without parser) took 13101.92 ms. Allocated memory was 202.4 MB in the beginning and 254.8 MB in the end (delta: 52.4 MB). Free memory was 166.9 MB in the beginning and 134.9 MB in the end (delta: 32.0 MB). Peak memory consumption was 85.1 MB. Max. memory is 8.0 GB. [2021-05-02 17:14:14,848 INFO L168 Benchmark]: CDTParser took 0.09 ms. Allocated memory is still 202.4 MB. Free memory is still 183.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 17:14:14,848 INFO L168 Benchmark]: CACSL2BoogieTranslator took 197.51 ms. Allocated memory is still 202.4 MB. Free memory was 166.7 MB in the beginning and 185.3 MB in the end (delta: -18.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-05-02 17:14:14,848 INFO L168 Benchmark]: Boogie Preprocessor took 31.71 ms. Allocated memory is still 202.4 MB. Free memory was 185.3 MB in the beginning and 183.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 17:14:14,848 INFO L168 Benchmark]: RCFGBuilder took 278.79 ms. Allocated memory is still 202.4 MB. Free memory was 183.2 MB in the beginning and 168.5 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-02 17:14:14,848 INFO L168 Benchmark]: TraceAbstraction took 12589.10 ms. Allocated memory was 202.4 MB in the beginning and 254.8 MB in the end (delta: 52.4 MB). Free memory was 168.0 MB in the beginning and 134.9 MB in the end (delta: 33.1 MB). Peak memory consumption was 87.1 MB. Max. memory is 8.0 GB. [2021-05-02 17:14:14,849 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09 ms. Allocated memory is still 202.4 MB. Free memory is still 183.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 197.51 ms. Allocated memory is still 202.4 MB. Free memory was 166.7 MB in the beginning and 185.3 MB in the end (delta: -18.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 31.71 ms. Allocated memory is still 202.4 MB. Free memory was 185.3 MB in the beginning and 183.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 278.79 ms. Allocated memory is still 202.4 MB. Free memory was 183.2 MB in the beginning and 168.5 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 12589.10 ms. Allocated memory was 202.4 MB in the beginning and 254.8 MB in the end (delta: 52.4 MB). Free memory was 168.0 MB in the beginning and 134.9 MB in the end (delta: 33.1 MB). Peak memory consumption was 87.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L17] int counter = 0; VAL [\old(counter)=10, counter=0] [L19] short k; [L20] long long y, x, c; [L21] k = __VERIFIER_nondet_short() [L22] CALL assume_abort_if_not(k <= 256) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L7] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L22] RET assume_abort_if_not(k <= 256) VAL [\old(counter)=0, counter=0, k=58] [L24] y = 0 [L25] x = 0 [L26] c = 0 VAL [\old(counter)=0, c=0, counter=0, k=58, x=0, y=0] [L28] EXPR counter++ VAL [\old(counter)=0, c=0, counter=1, counter++=0, k=58, x=0, y=0] [L28] COND TRUE counter++<2 [L29] CALL __VERIFIER_assert(-2*y*y*y*y*y*y - 6 * y*y*y*y*y - 5 * y*y*y*y + y*y + 12*x == 0) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L29] RET __VERIFIER_assert(-2*y*y*y*y*y*y - 6 * y*y*y*y*y - 5 * y*y*y*y + y*y + 12*x == 0) VAL [\old(counter)=0, c=0, counter=1, k=58, x=0, y=0] [L31] COND FALSE !(!(c < k)) [L34] c = c + 1 [L35] y = y + 1 [L36] x = y * y * y * y * y + x VAL [\old(counter)=0, c=1, counter=1, k=58, x=1, y=1] [L28] EXPR counter++ VAL [\old(counter)=0, c=1, counter=2, counter++=1, k=58, x=1, y=1] [L28] COND TRUE counter++<2 [L29] CALL __VERIFIER_assert(-2*y*y*y*y*y*y - 6 * y*y*y*y*y - 5 * y*y*y*y + y*y + 12*x == 0) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L29] RET __VERIFIER_assert(-2*y*y*y*y*y*y - 6 * y*y*y*y*y - 5 * y*y*y*y + y*y + 12*x == 0) VAL [\old(counter)=0, c=1, counter=2, k=58, x=1, y=1] [L31] COND FALSE !(!(c < k)) [L34] c = c + 1 [L35] y = y + 1 [L36] x = y * y * y * y * y + x VAL [\old(counter)=0, c=2, counter=2, k=58, x=33, y=2] [L28] EXPR counter++ VAL [\old(counter)=0, c=2, counter=3, counter++=2, k=58, x=33, y=2] [L28] COND FALSE !(counter++<2) [L39] CALL __VERIFIER_assert(-2*y*y*y*y*y*y - 6 * y*y*y*y*y - 5 * y*y*y*y + y*y + 12*x == 0) VAL [\old(cond)=1, \old(counter)=0, counter=3] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3] [L39] RET __VERIFIER_assert(-2*y*y*y*y*y*y - 6 * y*y*y*y*y - 5 * y*y*y*y + y*y + 12*x == 0) VAL [\old(counter)=0, c=2, counter=3, k=58, x=33, y=2] [L40] CALL __VERIFIER_assert(k*y == y*y) VAL [\old(cond)=0, \old(counter)=0, counter=3] [L10] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=3] [L12] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=3] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 12538.2ms, OverallIterations: 8, TraceHistogramMax: 4, EmptinessCheckTime: 9.0ms, AutomataDifference: 7585.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 6.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 181 SDtfs, 70 SDslu, 670 SDs, 0 SdLazy, 392 SolverSat, 29 SolverUnsat, 3 SolverUnknown, 0 SolverNotchecked, 7250.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 172 GetRequests, 124 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 2335.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=50occurred in iteration=6, InterpolantAutomatonStates: 49, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 52.3ms AutomataMinimizationTime, 7 MinimizatonAttempts, 4 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 65.5ms SsaConstructionTime, 233.5ms SatisfiabilityAnalysisTime, 2758.4ms InterpolantComputationTime, 215 NumberOfCodeBlocks, 215 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 169 ConstructedInterpolants, 0 QuantifiedInterpolants, 690 SizeOfPredicates, 16 NumberOfNonLiveVariables, 808 ConjunctsInSsa, 100 ConjunctsInUnsatCore, 7 InterpolantComputations, 3 PerfectInterpolantSequences, 25/47 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...