/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_valuebound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 14:10:13,227 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 14:10:13,228 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 14:10:13,263 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 14:10:13,281 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 14:10:13,284 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 14:10:13,285 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 14:10:13,286 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 14:10:13,288 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 14:10:13,313 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 14:10:13,315 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 14:10:13,319 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 14:10:13,320 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 14:10:13,321 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 14:10:13,322 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 14:10:13,323 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 14:10:13,328 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 14:10:13,337 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 14:10:13,337 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 14:10:13,338 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 14:10:13,341 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-02 14:10:13,372 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 14:10:13,372 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 14:10:13,374 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 14:10:13,374 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 14:10:13,374 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 14:10:13,393 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 14:10:13,393 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 14:10:13,394 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 14:10:13,394 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 14:10:13,394 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 14:10:13,395 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 14:10:13,395 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 14:10:13,395 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 14:10:13,395 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 14:10:13,395 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 14:10:13,395 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 14:10:13,395 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 14:10:13,396 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 14:10:13,396 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 14:10:13,396 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 14:10:13,396 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 14:10:13,396 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 14:10:13,396 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 14:10:13,396 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 14:10:13,397 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 14:10:13,397 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 14:10:13,397 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 14:10:13,397 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 14:10:13,397 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 14:10:13,752 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 14:10:13,779 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 14:10:13,781 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 14:10:13,782 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 14:10:13,782 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 14:10:13,783 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_valuebound1.c [2021-05-02 14:10:13,833 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f44c6cf1/dba7d8f762a4469ea19ce11442fe171e/FLAGae6aa871b [2021-05-02 14:10:14,270 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 14:10:14,271 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_valuebound1.c [2021-05-02 14:10:14,276 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f44c6cf1/dba7d8f762a4469ea19ce11442fe171e/FLAGae6aa871b [2021-05-02 14:10:14,300 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f44c6cf1/dba7d8f762a4469ea19ce11442fe171e [2021-05-02 14:10:14,302 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 14:10:14,311 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 14:10:14,314 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 14:10:14,315 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 14:10:14,317 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 14:10:14,318 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 02:10:14" (1/1) ... [2021-05-02 14:10:14,319 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d347683 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:10:14, skipping insertion in model container [2021-05-02 14:10:14,319 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 02:10:14" (1/1) ... [2021-05-02 14:10:14,324 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 14:10:14,335 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 14:10:14,491 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_valuebound1.c[576,589] [2021-05-02 14:10:14,526 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 14:10:14,532 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 14:10:14,594 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_valuebound1.c[576,589] [2021-05-02 14:10:14,619 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 14:10:14,651 INFO L208 MainTranslator]: Completed translation [2021-05-02 14:10:14,651 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:10:14 WrapperNode [2021-05-02 14:10:14,651 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 14:10:14,664 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 14:10:14,665 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 14:10:14,665 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 14:10:14,681 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:10:14" (1/1) ... [2021-05-02 14:10:14,681 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:10:14" (1/1) ... [2021-05-02 14:10:14,701 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:10:14" (1/1) ... [2021-05-02 14:10:14,701 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:10:14" (1/1) ... [2021-05-02 14:10:14,709 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:10:14" (1/1) ... [2021-05-02 14:10:14,718 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:10:14" (1/1) ... [2021-05-02 14:10:14,719 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:10:14" (1/1) ... [2021-05-02 14:10:14,725 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 14:10:14,725 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 14:10:14,726 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 14:10:14,726 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 14:10:14,726 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:10:14" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 14:10:14,859 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 14:10:14,860 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 14:10:14,860 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 14:10:14,860 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 14:10:14,860 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 14:10:14,860 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 14:10:14,860 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 14:10:14,860 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 14:10:14,861 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 14:10:14,861 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 14:10:14,861 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 14:10:14,861 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 14:10:14,862 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 14:10:14,862 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 14:10:14,862 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 14:10:14,862 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 14:10:14,862 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 14:10:14,862 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 14:10:14,862 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 14:10:14,863 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 14:10:15,128 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 14:10:15,128 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 14:10:15,129 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 02:10:15 BoogieIcfgContainer [2021-05-02 14:10:15,129 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 14:10:15,131 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 14:10:15,131 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 14:10:15,133 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 14:10:15,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 02:10:14" (1/3) ... [2021-05-02 14:10:15,134 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@108c3a6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 02:10:15, skipping insertion in model container [2021-05-02 14:10:15,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:10:14" (2/3) ... [2021-05-02 14:10:15,135 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@108c3a6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 02:10:15, skipping insertion in model container [2021-05-02 14:10:15,135 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 02:10:15" (3/3) ... [2021-05-02 14:10:15,136 INFO L111 eAbstractionObserver]: Analyzing ICFG cohendiv-ll_valuebound1.c [2021-05-02 14:10:15,140 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 14:10:15,143 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 14:10:15,154 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 14:10:15,180 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 14:10:15,180 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 14:10:15,180 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 14:10:15,180 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 14:10:15,180 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 14:10:15,181 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 14:10:15,181 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 14:10:15,181 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 14:10:15,195 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 22 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 14:10:15,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 14:10:15,199 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:10:15,200 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:10:15,200 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:10:15,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:10:15,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1768835633, now seen corresponding path program 1 times [2021-05-02 14:10:15,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:10:15,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688531019] [2021-05-02 14:10:15,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:10:15,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:10:15,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 14:10:15,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:10:15,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 14:10:15,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:10:15,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 14:10:15,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:10:15,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 14:10:15,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:10:15,484 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 14:10:15,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:10:15,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688531019] [2021-05-02 14:10:15,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688531019] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:10:15,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:10:15,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 14:10:15,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279229103] [2021-05-02 14:10:15,490 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 14:10:15,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:10:15,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 14:10:15,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:10:15,506 INFO L87 Difference]: Start difference. First operand has 39 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 22 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 14:10:15,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:10:15,705 INFO L93 Difference]: Finished difference Result 71 states and 110 transitions. [2021-05-02 14:10:15,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 14:10:15,707 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2021-05-02 14:10:15,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:10:15,716 INFO L225 Difference]: With dead ends: 71 [2021-05-02 14:10:15,724 INFO L226 Difference]: Without dead ends: 34 [2021-05-02 14:10:15,727 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 51.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:10:15,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-02 14:10:15,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-05-02 14:10:15,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 14:10:15,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2021-05-02 14:10:15,823 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 28 [2021-05-02 14:10:15,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:10:15,823 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2021-05-02 14:10:15,824 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 14:10:15,824 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2021-05-02 14:10:15,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 14:10:15,842 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:10:15,842 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:10:15,842 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 14:10:15,843 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:10:15,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:10:15,843 INFO L82 PathProgramCache]: Analyzing trace with hash 1378913883, now seen corresponding path program 1 times [2021-05-02 14:10:15,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:10:15,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355947200] [2021-05-02 14:10:15,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:10:15,871 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:10:15,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [333028528] [2021-05-02 14:10:15,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:10:15,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:10:15,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 14:10:15,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:10:16,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:16,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:16,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:16,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:16,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:16,190 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 14:10:16,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:10:16,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355947200] [2021-05-02 14:10:16,191 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:10:16,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333028528] [2021-05-02 14:10:16,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333028528] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:10:16,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:10:16,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-02 14:10:16,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554042519] [2021-05-02 14:10:16,193 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 14:10:16,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:10:16,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 14:10:16,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:10:16,194 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand has 9 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 14:10:16,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:10:16,412 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2021-05-02 14:10:16,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 14:10:16,413 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2021-05-02 14:10:16,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:10:16,415 INFO L225 Difference]: With dead ends: 45 [2021-05-02 14:10:16,415 INFO L226 Difference]: Without dead ends: 43 [2021-05-02 14:10:16,418 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 65.6ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:10:16,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-02 14:10:16,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2021-05-02 14:10:16,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 24 states have internal predecessors, (25), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 14:10:16,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2021-05-02 14:10:16,447 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 28 [2021-05-02 14:10:16,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:10:16,447 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2021-05-02 14:10:16,447 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 14:10:16,447 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2021-05-02 14:10:16,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 14:10:16,448 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:10:16,448 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:10:16,672 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 14:10:16,673 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:10:16,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:10:16,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1928335320, now seen corresponding path program 1 times [2021-05-02 14:10:16,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:10:16,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787856739] [2021-05-02 14:10:16,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:10:16,682 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:10:16,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1815056342] [2021-05-02 14:10:16,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:10:16,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:10:16,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 14:10:16,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:10:16,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:16,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:16,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:16,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:16,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:16,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:17,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:17,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:17,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:17,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:17,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:17,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:17,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:17,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:17,210 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 14:10:17,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:10:17,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787856739] [2021-05-02 14:10:17,211 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:10:17,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815056342] [2021-05-02 14:10:17,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815056342] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:10:17,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:10:17,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-05-02 14:10:17,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002047697] [2021-05-02 14:10:17,212 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 14:10:17,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:10:17,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 14:10:17,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:10:17,213 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 14:10:17,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:10:17,397 INFO L93 Difference]: Finished difference Result 57 states and 72 transitions. [2021-05-02 14:10:17,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 14:10:17,399 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 33 [2021-05-02 14:10:17,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:10:17,400 INFO L225 Difference]: With dead ends: 57 [2021-05-02 14:10:17,400 INFO L226 Difference]: Without dead ends: 54 [2021-05-02 14:10:17,401 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 109.3ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-02 14:10:17,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-02 14:10:17,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2021-05-02 14:10:17,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 18 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 14:10:17,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 67 transitions. [2021-05-02 14:10:17,439 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 67 transitions. Word has length 33 [2021-05-02 14:10:17,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:10:17,439 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 67 transitions. [2021-05-02 14:10:17,440 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 14:10:17,440 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 67 transitions. [2021-05-02 14:10:17,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-02 14:10:17,440 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:10:17,440 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:10:17,657 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:10:17,657 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:10:17,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:10:17,658 INFO L82 PathProgramCache]: Analyzing trace with hash -1297647068, now seen corresponding path program 1 times [2021-05-02 14:10:17,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:10:17,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370099313] [2021-05-02 14:10:17,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:10:17,668 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:10:17,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1820011165] [2021-05-02 14:10:17,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:10:17,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:10:17,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 14:10:17,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:10:17,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:17,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:17,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:17,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:17,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:17,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:17,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:17,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:17,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:18,000 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 14:10:18,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:10:18,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370099313] [2021-05-02 14:10:18,001 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:10:18,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820011165] [2021-05-02 14:10:18,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820011165] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:10:18,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:10:18,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-02 14:10:18,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881388866] [2021-05-02 14:10:18,002 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 14:10:18,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:10:18,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 14:10:18,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:10:18,002 INFO L87 Difference]: Start difference. First operand 53 states and 67 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 14:10:18,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:10:18,147 INFO L93 Difference]: Finished difference Result 79 states and 105 transitions. [2021-05-02 14:10:18,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 14:10:18,147 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 40 [2021-05-02 14:10:18,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:10:18,150 INFO L225 Difference]: With dead ends: 79 [2021-05-02 14:10:18,150 INFO L226 Difference]: Without dead ends: 77 [2021-05-02 14:10:18,152 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 66.4ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:10:18,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-05-02 14:10:18,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 70. [2021-05-02 14:10:18,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 40 states have internal predecessors, (44), 25 states have call successors, (25), 7 states have call predecessors, (25), 6 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2021-05-02 14:10:18,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 92 transitions. [2021-05-02 14:10:18,179 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 92 transitions. Word has length 40 [2021-05-02 14:10:18,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:10:18,180 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 92 transitions. [2021-05-02 14:10:18,181 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 14:10:18,181 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 92 transitions. [2021-05-02 14:10:18,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-02 14:10:18,183 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:10:18,183 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:10:18,399 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:10:18,399 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:10:18,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:10:18,400 INFO L82 PathProgramCache]: Analyzing trace with hash 991781023, now seen corresponding path program 1 times [2021-05-02 14:10:18,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:10:18,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012884715] [2021-05-02 14:10:18,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:10:18,425 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:10:18,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [978486529] [2021-05-02 14:10:18,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:10:18,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:10:18,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-02 14:10:18,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:10:18,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:18,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:18,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:18,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:18,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:18,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:18,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:18,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:18,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:18,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:18,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:18,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:18,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:18,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:18,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:18,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:18,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:18,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:18,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:18,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:18,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:18,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:18,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:18,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:18,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:18,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:18,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:18,783 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-05-02 14:10:18,783 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:10:18,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012884715] [2021-05-02 14:10:18,784 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:10:18,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978486529] [2021-05-02 14:10:18,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978486529] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:10:18,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:10:18,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 14:10:18,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886230602] [2021-05-02 14:10:18,785 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 14:10:18,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:10:18,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 14:10:18,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 14:10:18,786 INFO L87 Difference]: Start difference. First operand 70 states and 92 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 14:10:19,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:10:19,021 INFO L93 Difference]: Finished difference Result 95 states and 121 transitions. [2021-05-02 14:10:19,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 14:10:19,022 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 56 [2021-05-02 14:10:19,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:10:19,024 INFO L225 Difference]: With dead ends: 95 [2021-05-02 14:10:19,024 INFO L226 Difference]: Without dead ends: 53 [2021-05-02 14:10:19,025 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 87.9ms TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:10:19,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-05-02 14:10:19,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2021-05-02 14:10:19,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 31 states have internal predecessors, (31), 16 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-02 14:10:19,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 61 transitions. [2021-05-02 14:10:19,039 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 61 transitions. Word has length 56 [2021-05-02 14:10:19,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:10:19,040 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 61 transitions. [2021-05-02 14:10:19,040 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 14:10:19,040 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 61 transitions. [2021-05-02 14:10:19,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-05-02 14:10:19,045 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:10:19,045 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:10:19,262 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:10:19,262 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:10:19,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:10:19,262 INFO L82 PathProgramCache]: Analyzing trace with hash -2096667334, now seen corresponding path program 1 times [2021-05-02 14:10:19,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:10:19,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651176520] [2021-05-02 14:10:19,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:10:19,279 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:10:19,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2099704528] [2021-05-02 14:10:19,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:10:19,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:10:19,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-02 14:10:19,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:10:19,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:19,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:19,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:19,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:19,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:19,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:19,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:19,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:19,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:19,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:19,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:19,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:19,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:19,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:19,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:19,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:19,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:19,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:19,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:19,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:19,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:10:19,800 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 18 proven. 3 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-05-02 14:10:19,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:10:19,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651176520] [2021-05-02 14:10:19,801 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:10:19,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099704528] [2021-05-02 14:10:19,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099704528] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:10:19,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:10:19,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 14:10:19,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206071870] [2021-05-02 14:10:19,801 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 14:10:19,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:10:19,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 14:10:19,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-05-02 14:10:19,802 INFO L87 Difference]: Start difference. First operand 52 states and 61 transitions. Second operand has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2021-05-02 14:10:19,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:10:19,963 INFO L93 Difference]: Finished difference Result 67 states and 78 transitions. [2021-05-02 14:10:19,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 14:10:19,964 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) Word has length 63 [2021-05-02 14:10:19,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:10:19,964 INFO L225 Difference]: With dead ends: 67 [2021-05-02 14:10:19,964 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 14:10:19,965 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 172.8ms TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-05-02 14:10:19,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 14:10:19,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 14:10:19,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-02 14:10:19,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 14:10:19,965 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 63 [2021-05-02 14:10:19,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:10:19,965 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 14:10:19,965 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2021-05-02 14:10:19,965 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 14:10:19,965 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 14:10:20,181 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 14:10:20,183 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-02 14:10:20,572 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 24 [2021-05-02 14:10:20,682 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 28 [2021-05-02 14:10:20,973 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 16 [2021-05-02 14:10:21,118 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 28 [2021-05-02 14:10:21,142 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 8) no Hoare annotation was computed. [2021-05-02 14:10:21,142 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 8) no Hoare annotation was computed. [2021-05-02 14:10:21,142 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 8) no Hoare annotation was computed. [2021-05-02 14:10:21,142 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-02 14:10:21,143 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)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-05-02 14:10:21,146 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-02 14:10:21,146 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-02 14:10:21,146 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-02 14:10:21,146 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-02 14:10:21,146 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-02 14:10:21,146 INFO L201 CegarLoopUtils]: At program point assume_abort_if_notENTRY(lines 11 13) the Hoare annotation is: true [2021-05-02 14:10:21,146 INFO L198 CegarLoopUtils]: For program point L12(line 12) no Hoare annotation was computed. [2021-05-02 14:10:21,146 INFO L198 CegarLoopUtils]: For program point L12-2(lines 11 13) no Hoare annotation was computed. [2021-05-02 14:10:21,146 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 11 13) no Hoare annotation was computed. [2021-05-02 14:10:21,146 INFO L198 CegarLoopUtils]: For program point L64(line 64) no Hoare annotation was computed. [2021-05-02 14:10:21,146 INFO L198 CegarLoopUtils]: For program point L31(line 31) no Hoare annotation was computed. [2021-05-02 14:10:21,146 INFO L194 CegarLoopUtils]: At program point L29(line 29) the Hoare annotation is: (and (<= 0 main_~x~0) (<= main_~x~0 1)) [2021-05-02 14:10:21,146 INFO L194 CegarLoopUtils]: At program point L29-1(line 29) the Hoare annotation is: (and (<= 0 main_~x~0) (<= 0 main_~y~0) (<= main_~x~0 1) (<= main_~y~0 1)) [2021-05-02 14:10:21,146 INFO L201 CegarLoopUtils]: At program point L27(line 27) the Hoare annotation is: true [2021-05-02 14:10:21,146 INFO L198 CegarLoopUtils]: For program point L27-1(line 27) no Hoare annotation was computed. [2021-05-02 14:10:21,146 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 22 66) no Hoare annotation was computed. [2021-05-02 14:10:21,146 INFO L198 CegarLoopUtils]: For program point L50(lines 47 59) no Hoare annotation was computed. [2021-05-02 14:10:21,147 INFO L194 CegarLoopUtils]: At program point L48(line 48) the Hoare annotation is: (and (= main_~q~0 0) (= main_~b~0 main_~y~0) (= main_~x~0 main_~r~0) (= main_~a~0 1) (<= main_~y~0 main_~r~0) (<= 1 main_~y~0) (<= main_~x~0 1)) [2021-05-02 14:10:21,147 INFO L194 CegarLoopUtils]: At program point L48-1(line 48) the Hoare annotation is: (and (= main_~q~0 0) (= main_~b~0 main_~y~0) (= main_~x~0 main_~r~0) (= main_~a~0 1) (<= main_~y~0 main_~r~0) (<= 1 main_~y~0) (<= main_~x~0 1)) [2021-05-02 14:10:21,147 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 22 66) no Hoare annotation was computed. [2021-05-02 14:10:21,147 INFO L198 CegarLoopUtils]: For program point L40(lines 38 62) no Hoare annotation was computed. [2021-05-02 14:10:21,147 INFO L194 CegarLoopUtils]: At program point L38-2(lines 38 62) the Hoare annotation is: (let ((.cse0 (<= main_~y~0 1))) (or (and (<= main_~x~0 (+ main_~y~0 main_~r~0)) (= main_~b~0 main_~y~0) (= main_~a~0 1) (< (* 2 main_~r~0) main_~x~0) (= main_~q~0 1) (<= main_~y~0 main_~x~0) .cse0) (and (= main_~q~0 0) (= main_~x~0 main_~r~0) (<= 0 main_~x~0) (<= 1 main_~y~0) (= main_~b~0 0) (= main_~a~0 0) (<= main_~x~0 1) .cse0))) [2021-05-02 14:10:21,147 INFO L194 CegarLoopUtils]: At program point L38-3(lines 38 62) the Hoare annotation is: (let ((.cse0 (<= main_~y~0 1))) (or (and (= main_~q~0 0) (= main_~x~0 main_~r~0) (<= 0 main_~x~0) (<= 1 main_~y~0) (<= main_~x~0 1) .cse0) (and (<= main_~x~0 (+ main_~y~0 main_~r~0)) (<= 1 main_~b~0) (< (* 2 main_~r~0) main_~x~0) (= main_~q~0 1) (<= main_~y~0 main_~x~0) .cse0))) [2021-05-02 14:10:21,147 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 22 66) the Hoare annotation is: true [2021-05-02 14:10:21,147 INFO L194 CegarLoopUtils]: At program point L55(line 55) the Hoare annotation is: false [2021-05-02 14:10:21,147 INFO L198 CegarLoopUtils]: For program point L55-1(line 55) no Hoare annotation was computed. [2021-05-02 14:10:21,147 INFO L194 CegarLoopUtils]: At program point L49(line 49) the Hoare annotation is: (and (= main_~q~0 0) (= main_~b~0 main_~y~0) (= main_~x~0 main_~r~0) (= main_~a~0 1) (<= main_~y~0 main_~r~0) (<= 1 main_~y~0) (<= main_~x~0 1)) [2021-05-02 14:10:21,147 INFO L194 CegarLoopUtils]: At program point L47-2(lines 47 59) the Hoare annotation is: (and (= main_~q~0 0) (= main_~b~0 main_~y~0) (= main_~x~0 main_~r~0) (= main_~a~0 1) (<= main_~y~0 main_~r~0) (<= 1 main_~y~0) (<= main_~x~0 1)) [2021-05-02 14:10:21,147 INFO L198 CegarLoopUtils]: For program point L47-3(lines 47 59) no Hoare annotation was computed. [2021-05-02 14:10:21,148 INFO L194 CegarLoopUtils]: At program point L39(line 39) the Hoare annotation is: (let ((.cse0 (<= main_~y~0 1))) (or (and (<= main_~x~0 (+ main_~y~0 main_~r~0)) (= main_~b~0 main_~y~0) (= main_~a~0 1) (< (* 2 main_~r~0) main_~x~0) (= main_~q~0 1) (<= main_~y~0 main_~x~0) .cse0) (and (= main_~q~0 0) (= main_~x~0 main_~r~0) (<= 0 main_~x~0) (<= 1 main_~y~0) (= main_~b~0 0) (= main_~a~0 0) (<= main_~x~0 1) .cse0))) [2021-05-02 14:10:21,148 INFO L194 CegarLoopUtils]: At program point L39-1(line 39) the Hoare annotation is: (let ((.cse0 (<= main_~y~0 1))) (or (and (= main_~q~0 0) (= main_~x~0 main_~r~0) (<= 0 main_~x~0) (<= 1 main_~y~0) (<= main_~x~0 1) .cse0) (and (<= main_~x~0 (+ main_~y~0 main_~r~0)) (<= 1 main_~b~0) (< (* 2 main_~r~0) main_~x~0) (= main_~q~0 1) (<= main_~y~0 main_~x~0) .cse0))) [2021-05-02 14:10:21,148 INFO L198 CegarLoopUtils]: For program point L16(lines 16 17) no Hoare annotation was computed. [2021-05-02 14:10:21,148 INFO L198 CegarLoopUtils]: For program point L15(lines 15 18) no Hoare annotation was computed. [2021-05-02 14:10:21,148 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 14 20) the Hoare annotation is: true [2021-05-02 14:10:21,148 INFO L198 CegarLoopUtils]: For program point L15-2(lines 14 20) no Hoare annotation was computed. [2021-05-02 14:10:21,149 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 14 20) no Hoare annotation was computed. [2021-05-02 14:10:21,149 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2021-05-02 14:10:21,166 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 02:10:21 BoogieIcfgContainer [2021-05-02 14:10:21,166 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 14:10:21,167 INFO L168 Benchmark]: Toolchain (without parser) took 6863.36 ms. Allocated memory was 186.6 MB in the beginning and 244.3 MB in the end (delta: 57.7 MB). Free memory was 151.7 MB in the beginning and 201.2 MB in the end (delta: -49.5 MB). Peak memory consumption was 124.9 MB. Max. memory is 8.0 GB. [2021-05-02 14:10:21,167 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 186.6 MB. Free memory is still 168.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 14:10:21,167 INFO L168 Benchmark]: CACSL2BoogieTranslator took 337.04 ms. Allocated memory is still 186.6 MB. Free memory was 151.5 MB in the beginning and 169.6 MB in the end (delta: -18.1 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-05-02 14:10:21,167 INFO L168 Benchmark]: Boogie Preprocessor took 60.51 ms. Allocated memory is still 186.6 MB. Free memory was 169.6 MB in the beginning and 167.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 14:10:21,167 INFO L168 Benchmark]: RCFGBuilder took 403.96 ms. Allocated memory is still 186.6 MB. Free memory was 167.9 MB in the beginning and 151.8 MB in the end (delta: 16.1 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-02 14:10:21,167 INFO L168 Benchmark]: TraceAbstraction took 6035.64 ms. Allocated memory was 186.6 MB in the beginning and 244.3 MB in the end (delta: 57.7 MB). Free memory was 151.5 MB in the beginning and 201.2 MB in the end (delta: -49.7 MB). Peak memory consumption was 123.8 MB. Max. memory is 8.0 GB. [2021-05-02 14:10:21,168 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 186.6 MB. Free memory is still 168.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 337.04 ms. Allocated memory is still 186.6 MB. Free memory was 151.5 MB in the beginning and 169.6 MB in the end (delta: -18.1 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 60.51 ms. Allocated memory is still 186.6 MB. Free memory was 169.6 MB in the beginning and 167.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 403.96 ms. Allocated memory is still 186.6 MB. Free memory was 167.9 MB in the beginning and 151.8 MB in the end (delta: 16.1 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 6035.64 ms. Allocated memory was 186.6 MB in the beginning and 244.3 MB in the end (delta: 57.7 MB). Free memory was 151.5 MB in the beginning and 201.2 MB in the end (delta: -49.7 MB). Peak memory consumption was 123.8 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, 42 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 5003.6ms, OverallIterations: 6, TraceHistogramMax: 7, EmptinessCheckTime: 34.3ms, AutomataDifference: 1201.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 960.3ms, InitialAbstractionConstructionTime: 10.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 217 SDtfs, 171 SDslu, 793 SDs, 0 SdLazy, 484 SolverSat, 101 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 624.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 239 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 553.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=70occurred in iteration=4, InterpolantAutomatonStates: 51, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 173.4ms AutomataMinimizationTime, 6 MinimizatonAttempts, 12 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 18 LocationsWithAnnotation, 58 PreInvPairs, 72 NumberOfFragments, 336 HoareAnnotationTreeSize, 58 FomulaSimplifications, 348 FormulaSimplificationTreeSizeReduction, 203.4ms HoareSimplificationTime, 18 FomulaSimplificationsInter, 755 FormulaSimplificationTreeSizeReductionInter, 745.4ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 98.6ms SsaConstructionTime, 229.8ms SatisfiabilityAnalysisTime, 1797.5ms InterpolantComputationTime, 248 NumberOfCodeBlocks, 248 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 242 ConstructedInterpolants, 0 QuantifiedInterpolants, 904 SizeOfPredicates, 25 NumberOfNonLiveVariables, 781 ConjunctsInSsa, 117 ConjunctsInUnsatCore, 6 InterpolantComputations, 4 PerfectInterpolantSequences, 201/207 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: 47]: Loop Invariant Derived loop invariant: (((((q == 0 && b == y) && x == r) && a == 1) && y <= r) && 1 <= y) && x <= 1 - InvariantResult [Line: 38]: Loop Invariant Derived loop invariant: ((((((x <= y + r && b == y) && a == 1) && 2 * r < x) && q == 1) && y <= x) && y <= 1) || (((((((q == 0 && x == r) && 0 <= x) && 1 <= y) && b == 0) && a == 0) && x <= 1) && y <= 1) RESULT: Ultimate proved your program to be correct! Received shutdown request...