/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/geo2-ll_unwindbound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 15:21:51,171 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 15:21:51,173 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 15:21:51,225 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 15:21:51,249 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 15:21:51,250 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 15:21:51,250 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 15:21:51,251 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 15:21:51,252 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 15:21:51,252 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 15:21:51,253 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 15:21:51,255 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 15:21:51,256 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 15:21:51,261 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 15:21:51,265 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 15:21:51,267 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 15:21:51,273 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 15:21:51,279 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 15:21:51,279 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 15:21:51,280 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 15:21:51,283 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-02 15:21:51,317 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 15:21:51,318 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 15:21:51,320 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 15:21:51,321 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 15:21:51,321 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 15:21:51,321 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 15:21:51,321 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 15:21:51,321 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 15:21:51,321 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 15:21:51,321 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 15:21:51,322 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 15:21:51,322 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 15:21:51,322 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 15:21:51,323 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 15:21:51,323 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 15:21:51,323 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 15:21:51,323 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 15:21:51,323 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 15:21:51,323 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 15:21:51,323 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 15:21:51,323 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 15:21:51,324 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 15:21:51,324 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 15:21:51,324 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 15:21:51,324 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 15:21:51,324 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 15:21:51,324 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 15:21:51,324 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 15:21:51,324 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 15:21:51,601 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 15:21:51,617 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 15:21:51,619 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 15:21:51,620 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 15:21:51,621 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 15:21:51,622 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/geo2-ll_unwindbound10.c [2021-05-02 15:21:51,676 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45d9320ca/f5bfbf6a58614ce09dab1ee71d1a42eb/FLAG53240099c [2021-05-02 15:21:52,123 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 15:21:52,125 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/geo2-ll_unwindbound10.c [2021-05-02 15:21:52,131 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45d9320ca/f5bfbf6a58614ce09dab1ee71d1a42eb/FLAG53240099c [2021-05-02 15:21:52,146 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45d9320ca/f5bfbf6a58614ce09dab1ee71d1a42eb [2021-05-02 15:21:52,148 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 15:21:52,150 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 15:21:52,151 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 15:21:52,151 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 15:21:52,154 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 15:21:52,155 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:21:52" (1/1) ... [2021-05-02 15:21:52,156 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fa223cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:21:52, skipping insertion in model container [2021-05-02 15:21:52,156 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:21:52" (1/1) ... [2021-05-02 15:21:52,162 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 15:21:52,173 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 15:21:52,295 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/geo2-ll_unwindbound10.c[525,538] [2021-05-02 15:21:52,306 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:21:52,312 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 15:21:52,322 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/geo2-ll_unwindbound10.c[525,538] [2021-05-02 15:21:52,326 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:21:52,336 INFO L208 MainTranslator]: Completed translation [2021-05-02 15:21:52,337 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:21:52 WrapperNode [2021-05-02 15:21:52,337 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 15:21:52,338 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 15:21:52,338 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 15:21:52,338 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 15:21:52,352 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:21:52" (1/1) ... [2021-05-02 15:21:52,352 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:21:52" (1/1) ... [2021-05-02 15:21:52,361 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:21:52" (1/1) ... [2021-05-02 15:21:52,361 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:21:52" (1/1) ... [2021-05-02 15:21:52,381 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:21:52" (1/1) ... [2021-05-02 15:21:52,384 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:21:52" (1/1) ... [2021-05-02 15:21:52,385 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:21:52" (1/1) ... [2021-05-02 15:21:52,386 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 15:21:52,387 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 15:21:52,387 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 15:21:52,387 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 15:21:52,388 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:21:52" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 15:21:52,448 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 15:21:52,448 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 15:21:52,448 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 15:21:52,449 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 15:21:52,449 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 15:21:52,449 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 15:21:52,449 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 15:21:52,449 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 15:21:52,449 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 15:21:52,450 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 15:21:52,450 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 15:21:52,450 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 15:21:52,451 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 15:21:52,451 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 15:21:52,452 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 15:21:52,452 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 15:21:52,452 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 15:21:52,453 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 15:21:52,453 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 15:21:52,453 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 15:21:52,649 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 15:21:52,649 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 15:21:52,650 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:21:52 BoogieIcfgContainer [2021-05-02 15:21:52,650 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 15:21:52,651 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 15:21:52,651 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 15:21:52,653 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 15:21:52,654 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 03:21:52" (1/3) ... [2021-05-02 15:21:52,654 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28c3aa86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:21:52, skipping insertion in model container [2021-05-02 15:21:52,654 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:21:52" (2/3) ... [2021-05-02 15:21:52,654 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28c3aa86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:21:52, skipping insertion in model container [2021-05-02 15:21:52,655 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:21:52" (3/3) ... [2021-05-02 15:21:52,656 INFO L111 eAbstractionObserver]: Analyzing ICFG geo2-ll_unwindbound10.c [2021-05-02 15:21:52,662 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 15:21:52,665 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 15:21:52,694 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 15:21:52,712 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 15:21:52,712 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 15:21:52,712 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 15:21:52,712 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 15:21:52,713 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 15:21:52,713 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 15:21:52,713 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 15:21:52,713 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 15:21:52,725 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 15:21:52,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 15:21:52,729 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:21:52,729 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:21:52,729 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:21:52,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:21:52,734 INFO L82 PathProgramCache]: Analyzing trace with hash 1665267581, now seen corresponding path program 1 times [2021-05-02 15:21:52,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:21:52,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792682560] [2021-05-02 15:21:52,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:21:52,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:21:52,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 15:21:52,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:21:52,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 15:21:52,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:21:52,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792682560] [2021-05-02 15:21:52,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792682560] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:21:52,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:21:52,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 15:21:52,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677416288] [2021-05-02 15:21:52,959 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 15:21:52,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:21:52,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 15:21:52,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 15:21:52,970 INFO L87 Difference]: Start difference. First operand has 22 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 15:21:53,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:21:53,021 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2021-05-02 15:21:53,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 15:21:53,022 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-02 15:21:53,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:21:53,028 INFO L225 Difference]: With dead ends: 39 [2021-05-02 15:21:53,028 INFO L226 Difference]: Without dead ends: 18 [2021-05-02 15:21:53,030 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 56.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 15:21:53,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-05-02 15:21:53,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2021-05-02 15:21:53,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 15:21:53,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-05-02 15:21:53,073 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2021-05-02 15:21:53,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:21:53,074 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-05-02 15:21:53,074 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 15:21:53,074 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-05-02 15:21:53,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 15:21:53,075 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:21:53,076 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:21:53,076 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 15:21:53,076 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:21:53,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:21:53,077 INFO L82 PathProgramCache]: Analyzing trace with hash -318583316, now seen corresponding path program 1 times [2021-05-02 15:21:53,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:21:53,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873769511] [2021-05-02 15:21:53,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:21:53,115 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:21:53,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1511139466] [2021-05-02 15:21:53,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:21:53,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:21:53,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 15:21:53,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:21:53,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:53,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:53,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:53,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:53,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:53,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 15:21:53,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:21:53,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873769511] [2021-05-02 15:21:53,303 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:21:53,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511139466] [2021-05-02 15:21:53,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511139466] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:21:53,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:21:53,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 15:21:53,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706514171] [2021-05-02 15:21:53,305 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 15:21:53,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:21:53,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 15:21:53,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 15:21:53,309 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 15:21:53,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:21:53,324 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2021-05-02 15:21:53,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 15:21:53,325 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-02 15:21:53,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:21:53,326 INFO L225 Difference]: With dead ends: 26 [2021-05-02 15:21:53,326 INFO L226 Difference]: Without dead ends: 19 [2021-05-02 15:21:53,327 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.3ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 15:21:53,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-05-02 15:21:53,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-05-02 15:21:53,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 15:21:53,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-05-02 15:21:53,338 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 12 [2021-05-02 15:21:53,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:21:53,341 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-05-02 15:21:53,341 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 15:21:53,342 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-05-02 15:21:53,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 15:21:53,342 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:21:53,343 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:21:53,566 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 15:21:53,566 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:21:53,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:21:53,567 INFO L82 PathProgramCache]: Analyzing trace with hash -316795856, now seen corresponding path program 1 times [2021-05-02 15:21:53,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:21:53,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552533705] [2021-05-02 15:21:53,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:21:53,579 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:21:53,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1707404293] [2021-05-02 15:21:53,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:21:53,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:21:53,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-02 15:21:53,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:21:53,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 15:21:53,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:21:53,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552533705] [2021-05-02 15:21:53,694 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:21:53,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707404293] [2021-05-02 15:21:53,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707404293] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:21:53,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:21:53,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 15:21:53,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720331630] [2021-05-02 15:21:53,695 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 15:21:53,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:21:53,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 15:21:53,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 15:21:53,696 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 15:21:53,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:21:53,721 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2021-05-02 15:21:53,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 15:21:53,722 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-02 15:21:53,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:21:53,722 INFO L225 Difference]: With dead ends: 28 [2021-05-02 15:21:53,722 INFO L226 Difference]: Without dead ends: 25 [2021-05-02 15:21:53,723 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.4ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:21:53,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-02 15:21:53,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-05-02 15:21:53,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 15:21:53,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2021-05-02 15:21:53,728 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 12 [2021-05-02 15:21:53,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:21:53,728 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2021-05-02 15:21:53,728 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 15:21:53,728 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2021-05-02 15:21:53,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-02 15:21:53,729 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:21:53,729 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:21:53,946 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:21:53,946 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:21:53,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:21:53,947 INFO L82 PathProgramCache]: Analyzing trace with hash -2089867248, now seen corresponding path program 1 times [2021-05-02 15:21:53,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:21:53,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676513726] [2021-05-02 15:21:53,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:21:53,955 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:21:53,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1829191473] [2021-05-02 15:21:53,955 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 15:21:53,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:21:53,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 15:21:54,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:21:54,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:54,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:54,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:54,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:54,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:54,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:54,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:54,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:54,058 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 15:21:54,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:21:54,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676513726] [2021-05-02 15:21:54,058 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:21:54,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829191473] [2021-05-02 15:21:54,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829191473] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:21:54,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:21:54,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 15:21:54,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992603379] [2021-05-02 15:21:54,059 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 15:21:54,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:21:54,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 15:21:54,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 15:21:54,060 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 15:21:54,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:21:54,084 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2021-05-02 15:21:54,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 15:21:54,085 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-02 15:21:54,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:21:54,085 INFO L225 Difference]: With dead ends: 34 [2021-05-02 15:21:54,086 INFO L226 Difference]: Without dead ends: 27 [2021-05-02 15:21:54,086 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 13.0ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:21:54,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-02 15:21:54,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-02 15:21:54,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 15:21:54,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2021-05-02 15:21:54,090 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 20 [2021-05-02 15:21:54,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:21:54,091 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2021-05-02 15:21:54,091 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 15:21:54,091 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2021-05-02 15:21:54,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-02 15:21:54,091 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:21:54,091 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:21:54,312 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:21:54,313 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:21:54,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:21:54,313 INFO L82 PathProgramCache]: Analyzing trace with hash -2088079788, now seen corresponding path program 1 times [2021-05-02 15:21:54,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:21:54,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580437527] [2021-05-02 15:21:54,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:21:54,325 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:21:54,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1397451739] [2021-05-02 15:21:54,326 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 15:21:54,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:21:54,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 15:21:54,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:21:54,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:54,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:54,527 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 15:21:54,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:21:54,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580437527] [2021-05-02 15:21:54,528 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:21:54,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397451739] [2021-05-02 15:21:54,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397451739] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:21:54,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:21:54,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 15:21:54,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379511204] [2021-05-02 15:21:54,529 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 15:21:54,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:21:54,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 15:21:54,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 15:21:54,530 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 15:21:54,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:21:54,640 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2021-05-02 15:21:54,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 15:21:54,641 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-02 15:21:54,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:21:54,641 INFO L225 Difference]: With dead ends: 36 [2021-05-02 15:21:54,642 INFO L226 Difference]: Without dead ends: 33 [2021-05-02 15:21:54,642 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 72.5ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:21:54,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-02 15:21:54,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-02 15:21:54,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 15:21:54,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2021-05-02 15:21:54,648 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 20 [2021-05-02 15:21:54,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:21:54,648 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2021-05-02 15:21:54,648 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 15:21:54,648 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2021-05-02 15:21:54,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 15:21:54,649 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:21:54,649 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:21:54,860 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:21:54,861 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:21:54,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:21:54,861 INFO L82 PathProgramCache]: Analyzing trace with hash -696181196, now seen corresponding path program 2 times [2021-05-02 15:21:54,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:21:54,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623727135] [2021-05-02 15:21:54,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:21:54,872 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:21:54,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1182976285] [2021-05-02 15:21:54,873 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 15:21:54,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:21:54,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:21:54,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 15:21:54,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:21:54,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:54,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:54,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:54,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:54,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:54,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:54,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:54,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:54,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:55,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:55,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:21:55,030 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 15:21:55,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:21:55,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623727135] [2021-05-02 15:21:55,031 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:21:55,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182976285] [2021-05-02 15:21:55,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182976285] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:21:55,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:21:55,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 15:21:55,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738512578] [2021-05-02 15:21:55,032 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 15:21:55,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:21:55,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 15:21:55,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:21:55,032 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 15:21:55,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:21:55,075 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2021-05-02 15:21:55,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 15:21:55,075 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2021-05-02 15:21:55,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:21:55,076 INFO L225 Difference]: With dead ends: 42 [2021-05-02 15:21:55,076 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 15:21:55,076 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 24.6ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-02 15:21:55,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 15:21:55,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-02 15:21:55,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 24 states have (on average 1.125) internal successors, (27), 25 states have internal predecessors, (27), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 15:21:55,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2021-05-02 15:21:55,081 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 28 [2021-05-02 15:21:55,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:21:55,081 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2021-05-02 15:21:55,081 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 15:21:55,081 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2021-05-02 15:21:55,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 15:21:55,082 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:21:55,082 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:21:55,296 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 15:21:55,297 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:21:55,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:21:55,297 INFO L82 PathProgramCache]: Analyzing trace with hash -694393736, now seen corresponding path program 2 times [2021-05-02 15:21:55,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:21:55,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463297155] [2021-05-02 15:21:55,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:21:55,303 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:21:55,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [216234658] [2021-05-02 15:21:55,303 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 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 15:21:55,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:21:55,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:21:55,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-02 15:21:55,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:22:01,526 WARN L205 SmtUtils]: Spent 4.06 s on a formula simplification that was a NOOP. DAG size: 13 [2021-05-02 15:22:01,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:22:01,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:22:01,593 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 15:22:01,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:22:01,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463297155] [2021-05-02 15:22:01,593 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:22:01,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216234658] [2021-05-02 15:22:01,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216234658] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:22:01,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:22:01,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 15:22:01,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115119430] [2021-05-02 15:22:01,594 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 15:22:01,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:22:01,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 15:22:01,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=70, Unknown=1, NotChecked=0, Total=90 [2021-05-02 15:22:01,595 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 10 states, 10 states have (on average 1.7) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 15:22:23,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:22:23,929 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2021-05-02 15:22:23,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 15:22:23,930 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2021-05-02 15:22:23,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:22:23,931 INFO L225 Difference]: With dead ends: 44 [2021-05-02 15:22:23,931 INFO L226 Difference]: Without dead ends: 42 [2021-05-02 15:22:23,931 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 6175.8ms TimeCoverageRelationStatistics Valid=30, Invalid=101, Unknown=1, NotChecked=0, Total=132 [2021-05-02 15:22:23,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-02 15:22:23,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2021-05-02 15:22:23,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 29 states have internal predecessors, (30), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 15:22:23,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2021-05-02 15:22:23,937 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 28 [2021-05-02 15:22:23,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:22:23,937 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2021-05-02 15:22:23,937 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 15:22:23,937 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2021-05-02 15:22:23,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 15:22:23,938 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:22:23,938 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:22:24,139 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:22:24,139 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:22:24,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:22:24,139 INFO L82 PathProgramCache]: Analyzing trace with hash -1823573773, now seen corresponding path program 1 times [2021-05-02 15:22:24,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:22:24,140 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66050006] [2021-05-02 15:22:24,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:22:24,145 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:22:24,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1532496459] [2021-05-02 15:22:24,146 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 15:22:24,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:22:24,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 15:22:24,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:22:24,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:22:24,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:22:24,368 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 15:22:24,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:22:24,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66050006] [2021-05-02 15:22:24,368 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:22:24,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532496459] [2021-05-02 15:22:24,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532496459] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:22:24,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:22:24,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 15:22:24,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781204774] [2021-05-02 15:22:24,369 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 15:22:24,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:22:24,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 15:22:24,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-02 15:22:24,370 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 15:22:26,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:22:26,569 INFO L93 Difference]: Finished difference Result 47 states and 48 transitions. [2021-05-02 15:22:26,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 15:22:26,570 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 34 [2021-05-02 15:22:26,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:22:26,572 INFO L225 Difference]: With dead ends: 47 [2021-05-02 15:22:26,572 INFO L226 Difference]: Without dead ends: 40 [2021-05-02 15:22:26,572 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 42.3ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-02 15:22:26,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-02 15:22:26,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-05-02 15:22:26,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 29 states have internal predecessors, (29), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 15:22:26,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2021-05-02 15:22:26,577 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 34 [2021-05-02 15:22:26,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:22:26,578 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2021-05-02 15:22:26,578 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 15:22:26,578 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2021-05-02 15:22:26,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 15:22:26,579 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:22:26,579 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:22:26,793 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:22:26,793 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:22:26,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:22:26,793 INFO L82 PathProgramCache]: Analyzing trace with hash 618442840, now seen corresponding path program 3 times [2021-05-02 15:22:26,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:22:26,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681355202] [2021-05-02 15:22:26,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:22:26,807 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:22:26,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [670038324] [2021-05-02 15:22:26,807 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 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 15:22:26,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 15:22:26,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:22:26,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 15:22:26,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:22:27,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:22:27,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:22:27,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:22:27,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:22:27,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:22:27,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:22:27,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:22:27,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:22:27,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:22:27,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:22:27,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:22:27,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:22:27,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:22:29,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:22:29,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:22:29,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:22:29,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:22:29,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:22:29,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:22:29,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:22:31,232 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 15:22:31,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:22:31,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681355202] [2021-05-02 15:22:31,232 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:22:31,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670038324] [2021-05-02 15:22:31,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670038324] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:22:31,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:22:31,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 15:22:31,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589843608] [2021-05-02 15:22:31,233 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 15:22:31,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:22:31,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 15:22:31,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 15:22:31,234 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 15:22:50,166 WARN L205 SmtUtils]: Spent 16.67 s on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2021-05-02 15:22:52,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:22:52,193 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2021-05-02 15:22:52,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 15:22:52,194 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 36 [2021-05-02 15:22:52,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:22:52,195 INFO L225 Difference]: With dead ends: 40 [2021-05-02 15:22:52,195 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 15:22:52,195 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 16852.9ms TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-05-02 15:22:52,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 15:22:52,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 15:22:52,196 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 15:22:52,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 15:22:52,196 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 36 [2021-05-02 15:22:52,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:22:52,196 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 15:22:52,196 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 15:22:52,196 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 15:22:52,196 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 15:22:52,397 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-02 15:22:52,399 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-02 15:22:52,667 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 32 [2021-05-02 15:23:13,980 WARN L205 SmtUtils]: Spent 21.31 s on a formula simplification. DAG size of input: 39 DAG size of output: 32 [2021-05-02 15:23:14,118 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 32 [2021-05-02 15:23:14,121 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 8) no Hoare annotation was computed. [2021-05-02 15:23:14,121 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 8) no Hoare annotation was computed. [2021-05-02 15:23:14,121 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 8) no Hoare annotation was computed. [2021-05-02 15:23:14,121 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-02 15:23:14,121 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 15:23:14,121 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-02 15:23:14,121 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-02 15:23:14,121 INFO L194 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: (<= ~counter~0 0) [2021-05-02 15:23:14,121 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-02 15:23:14,122 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-02 15:23:14,122 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notENTRY(lines 11 13) no Hoare annotation was computed. [2021-05-02 15:23:14,122 INFO L198 CegarLoopUtils]: For program point L12(line 12) no Hoare annotation was computed. [2021-05-02 15:23:14,122 INFO L198 CegarLoopUtils]: For program point L12-2(lines 11 13) no Hoare annotation was computed. [2021-05-02 15:23:14,122 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 11 13) no Hoare annotation was computed. [2021-05-02 15:23:14,122 INFO L198 CegarLoopUtils]: For program point L34-1(lines 34 43) no Hoare annotation was computed. [2021-05-02 15:23:14,122 INFO L194 CegarLoopUtils]: At program point L34-3(lines 34 43) the Hoare annotation is: (let ((.cse0 (= main_~z~0 0))) (or (and (= main_~y~0 0) .cse0) (not (<= |old(~counter~0)| 0)) (let ((.cse1 (+ main_~x~0 (- 1)))) (and (= (mod .cse1 main_~z~0) 0) (not .cse0) (let ((.cse2 (div .cse1 main_~z~0))) (= (+ (* main_~z~0 .cse2) 1) (+ .cse2 (* main_~z~0 (div main_~y~0 main_~z~0))))) (= (mod main_~y~0 main_~z~0) 0))) (and (= main_~y~0 1) (<= ~counter~0 0) (= main_~x~0 1)))) [2021-05-02 15:23:14,122 INFO L194 CegarLoopUtils]: At program point L34-4(lines 34 43) the Hoare annotation is: (let ((.cse0 (= main_~z~0 0))) (or (and (= main_~y~0 0) .cse0) (not (<= |old(~counter~0)| 0)) (= (+ (* main_~x~0 main_~z~0) 1) (+ main_~x~0 (* main_~y~0 main_~z~0))) (let ((.cse1 (+ main_~x~0 (- 1)))) (and (= (mod .cse1 main_~z~0) 0) (not .cse0) (let ((.cse2 (div .cse1 main_~z~0))) (= (+ (* main_~z~0 .cse2) 1) (+ .cse2 (* main_~z~0 (div main_~y~0 main_~z~0))))) (= (mod main_~y~0 main_~z~0) 0))))) [2021-05-02 15:23:14,123 INFO L194 CegarLoopUtils]: At program point mainENTRY(lines 24 46) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (= ~counter~0 |old(~counter~0)|)) [2021-05-02 15:23:14,123 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 24 46) no Hoare annotation was computed. [2021-05-02 15:23:14,123 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 24 46) no Hoare annotation was computed. [2021-05-02 15:23:14,123 INFO L198 CegarLoopUtils]: For program point L44(line 44) no Hoare annotation was computed. [2021-05-02 15:23:14,123 INFO L194 CegarLoopUtils]: At program point L35(line 35) the Hoare annotation is: (let ((.cse0 (= main_~z~0 0))) (or (and (= main_~y~0 0) .cse0) (not (<= |old(~counter~0)| 0)) (and (<= ~counter~0 1) (= main_~y~0 1) (= main_~x~0 1)) (let ((.cse1 (+ main_~x~0 (- 1)))) (and (= (mod .cse1 main_~z~0) 0) (not .cse0) (let ((.cse2 (div .cse1 main_~z~0))) (= (+ (* main_~z~0 .cse2) 1) (+ .cse2 (* main_~z~0 (div main_~y~0 main_~z~0))))) (= (mod main_~y~0 main_~z~0) 0))))) [2021-05-02 15:23:14,123 INFO L198 CegarLoopUtils]: For program point L35-1(lines 34 43) no Hoare annotation was computed. [2021-05-02 15:23:14,123 INFO L198 CegarLoopUtils]: For program point L16(lines 16 17) no Hoare annotation was computed. [2021-05-02 15:23:14,123 INFO L198 CegarLoopUtils]: For program point L15(lines 15 18) no Hoare annotation was computed. [2021-05-02 15:23:14,123 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 14 20) the Hoare annotation is: true [2021-05-02 15:23:14,123 INFO L198 CegarLoopUtils]: For program point L15-2(lines 14 20) no Hoare annotation was computed. [2021-05-02 15:23:14,123 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 14 20) no Hoare annotation was computed. [2021-05-02 15:23:14,124 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2021-05-02 15:23:14,136 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 03:23:14 BoogieIcfgContainer [2021-05-02 15:23:14,136 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 15:23:14,137 INFO L168 Benchmark]: Toolchain (without parser) took 81987.03 ms. Allocated memory was 181.4 MB in the beginning and 218.1 MB in the end (delta: 36.7 MB). Free memory was 144.8 MB in the beginning and 176.5 MB in the end (delta: -31.7 MB). Peak memory consumption was 106.5 MB. Max. memory is 8.0 GB. [2021-05-02 15:23:14,137 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 181.4 MB. Free memory is still 161.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 15:23:14,137 INFO L168 Benchmark]: CACSL2BoogieTranslator took 186.54 ms. Allocated memory is still 181.4 MB. Free memory was 144.6 MB in the beginning and 160.8 MB in the end (delta: -16.1 MB). Peak memory consumption was 7.4 MB. Max. memory is 8.0 GB. [2021-05-02 15:23:14,137 INFO L168 Benchmark]: Boogie Preprocessor took 48.24 ms. Allocated memory is still 181.4 MB. Free memory was 160.8 MB in the beginning and 164.3 MB in the end (delta: -3.6 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2021-05-02 15:23:14,137 INFO L168 Benchmark]: RCFGBuilder took 263.13 ms. Allocated memory is still 181.4 MB. Free memory was 164.3 MB in the beginning and 150.1 MB in the end (delta: 14.3 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-05-02 15:23:14,137 INFO L168 Benchmark]: TraceAbstraction took 81484.98 ms. Allocated memory was 181.4 MB in the beginning and 218.1 MB in the end (delta: 36.7 MB). Free memory was 149.7 MB in the beginning and 176.5 MB in the end (delta: -26.8 MB). Peak memory consumption was 111.4 MB. Max. memory is 8.0 GB. [2021-05-02 15:23:14,138 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 181.4 MB. Free memory is still 161.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 186.54 ms. Allocated memory is still 181.4 MB. Free memory was 144.6 MB in the beginning and 160.8 MB in the end (delta: -16.1 MB). Peak memory consumption was 7.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 48.24 ms. Allocated memory is still 181.4 MB. Free memory was 160.8 MB in the beginning and 164.3 MB in the end (delta: -3.6 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 263.13 ms. Allocated memory is still 181.4 MB. Free memory was 164.3 MB in the beginning and 150.1 MB in the end (delta: 14.3 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 81484.98 ms. Allocated memory was 181.4 MB in the beginning and 218.1 MB in the end (delta: 36.7 MB). Free memory was 149.7 MB in the beginning and 176.5 MB in the end (delta: -26.8 MB). Peak memory consumption was 111.4 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, 29 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 59687.7ms, OverallIterations: 9, TraceHistogramMax: 4, EmptinessCheckTime: 11.4ms, AutomataDifference: 45805.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 21722.3ms, InitialAbstractionConstructionTime: 9.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 158 SDtfs, 74 SDslu, 488 SDs, 0 SdLazy, 272 SolverSat, 26 SolverUnsat, 14 SolverUnknown, 0 SolverNotchecked, 28498.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 200 GetRequests, 146 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 23265.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=40occurred in iteration=7, InterpolantAutomatonStates: 60, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 71.9ms AutomataMinimizationTime, 9 MinimizatonAttempts, 3 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 8 LocationsWithAnnotation, 20 PreInvPairs, 32 NumberOfFragments, 228 HoareAnnotationTreeSize, 20 FomulaSimplifications, 14 FormulaSimplificationTreeSizeReduction, 70.4ms HoareSimplificationTime, 8 FomulaSimplificationsInter, 562 FormulaSimplificationTreeSizeReductionInter, 21643.8ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 85.7ms SsaConstructionTime, 237.4ms SatisfiabilityAnalysisTime, 11334.9ms InterpolantComputationTime, 201 NumberOfCodeBlocks, 185 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 192 ConstructedInterpolants, 0 QuantifiedInterpolants, 714 SizeOfPredicates, 17 NumberOfNonLiveVariables, 1071 ConjunctsInSsa, 110 ConjunctsInUnsatCore, 9 InterpolantComputations, 3 PerfectInterpolantSequences, 77/109 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: 34]: Loop Invariant Derived loop invariant: (((y == 0 && z == 0) || !(\old(counter) <= 0)) || ((((x + -1) % z == 0 && !(z == 0)) && z * ((x + -1) / z) + 1 == (x + -1) / z + z * (y / z)) && y % z == 0)) || ((y == 1 && counter <= 0) && x == 1) RESULT: Ultimate proved your program to be correct! Received shutdown request...