/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/divbin_valuebound100.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 14:41:53,531 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 14:41:53,533 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 14:41:53,555 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 14:41:53,574 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 14:41:53,576 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 14:41:53,577 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 14:41:53,578 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 14:41:53,580 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 14:41:53,580 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 14:41:53,582 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 14:41:53,586 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 14:41:53,587 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 14:41:53,588 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 14:41:53,588 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 14:41:53,590 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 14:41:53,594 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 14:41:53,600 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 14:41:53,601 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 14:41:53,601 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 14:41:53,602 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 14:41:53,636 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 14:41:53,636 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 14:41:53,637 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 14:41:53,637 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 14:41:53,637 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 14:41:53,637 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 14:41:53,638 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 14:41:53,638 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 14:41:53,638 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 14:41:53,638 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 14:41:53,638 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 14:41:53,638 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 14:41:53,638 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 14:41:53,638 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 14:41:53,638 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 14:41:53,638 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 14:41:53,638 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 14:41:53,639 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 14:41:53,639 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 14:41:53,639 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 14:41:53,639 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 14:41:53,639 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 14:41:53,639 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 14:41:53,639 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 14:41:53,639 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 14:41:53,639 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 14:41:53,639 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 14:41:53,640 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 14:41:53,640 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 14:41:53,926 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 14:41:53,948 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 14:41:53,950 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 14:41:53,951 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 14:41:53,951 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 14:41:53,952 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/divbin_valuebound100.i [2021-05-02 14:41:54,001 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd54514d7/62f2445afca84dfa99a65096f69d2e56/FLAGe955b4121 [2021-05-02 14:41:54,378 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 14:41:54,379 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin_valuebound100.i [2021-05-02 14:41:54,385 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd54514d7/62f2445afca84dfa99a65096f69d2e56/FLAGe955b4121 [2021-05-02 14:41:54,396 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd54514d7/62f2445afca84dfa99a65096f69d2e56 [2021-05-02 14:41:54,399 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 14:41:54,400 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 14:41:54,403 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 14:41:54,403 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 14:41:54,406 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 14:41:54,406 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 02:41:54" (1/1) ... [2021-05-02 14:41:54,407 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1741de3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:41:54, skipping insertion in model container [2021-05-02 14:41:54,407 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 02:41:54" (1/1) ... [2021-05-02 14:41:54,412 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 14:41:54,426 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 14:41:54,523 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/divbin_valuebound100.i[958,971] [2021-05-02 14:41:54,532 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 14:41:54,552 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 14:41:54,567 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/divbin_valuebound100.i[958,971] [2021-05-02 14:41:54,571 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 14:41:54,590 INFO L208 MainTranslator]: Completed translation [2021-05-02 14:41:54,591 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:41:54 WrapperNode [2021-05-02 14:41:54,591 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 14:41:54,592 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 14:41:54,592 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 14:41:54,593 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 14:41:54,600 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:41:54" (1/1) ... [2021-05-02 14:41:54,600 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:41:54" (1/1) ... [2021-05-02 14:41:54,604 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:41:54" (1/1) ... [2021-05-02 14:41:54,605 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:41:54" (1/1) ... [2021-05-02 14:41:54,615 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:41:54" (1/1) ... [2021-05-02 14:41:54,618 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:41:54" (1/1) ... [2021-05-02 14:41:54,621 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:41:54" (1/1) ... [2021-05-02 14:41:54,624 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 14:41:54,625 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 14:41:54,625 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 14:41:54,625 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 14:41:54,626 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:41:54" (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 14:41:54,685 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 14:41:54,685 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 14:41:54,685 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 14:41:54,686 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 14:41:54,686 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 14:41:54,686 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 14:41:54,686 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 14:41:54,687 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 14:41:54,687 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-02 14:41:54,687 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-02 14:41:54,687 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 14:41:54,687 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 14:41:54,688 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-02 14:41:54,688 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 14:41:54,688 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 14:41:54,688 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 14:41:54,688 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 14:41:54,689 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 14:41:54,689 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 14:41:54,689 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 14:41:54,689 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 14:41:54,689 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 14:41:54,945 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 14:41:54,946 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 14:41:54,947 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 02:41:54 BoogieIcfgContainer [2021-05-02 14:41:54,947 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 14:41:54,948 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 14:41:54,948 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 14:41:54,950 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 14:41:54,950 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 02:41:54" (1/3) ... [2021-05-02 14:41:54,950 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49fa626c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 02:41:54, skipping insertion in model container [2021-05-02 14:41:54,950 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:41:54" (2/3) ... [2021-05-02 14:41:54,951 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49fa626c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 02:41:54, skipping insertion in model container [2021-05-02 14:41:54,951 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 02:41:54" (3/3) ... [2021-05-02 14:41:54,951 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin_valuebound100.i [2021-05-02 14:41:54,955 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 14:41:54,958 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 14:41:54,971 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 14:41:54,996 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 14:41:54,996 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 14:41:54,997 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 14:41:54,997 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 14:41:54,997 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 14:41:54,997 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 14:41:54,997 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 14:41:54,997 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 14:41:55,013 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 14:41:55,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 14:41:55,017 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:41:55,018 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 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 14:41:55,018 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:41:55,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:41:55,022 INFO L82 PathProgramCache]: Analyzing trace with hash 291922115, now seen corresponding path program 1 times [2021-05-02 14:41:55,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:41:55,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334603106] [2021-05-02 14:41:55,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:41:55,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:41:55,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 14:41:55,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:41:55,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 14:41:55,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:41:55,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 14:41:55,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:41:55,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 14:41:55,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:41:55,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 14:41:55,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:41:55,246 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 14:41:55,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:41:55,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334603106] [2021-05-02 14:41:55,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334603106] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:41:55,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:41:55,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 14:41:55,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488526265] [2021-05-02 14:41:55,250 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 14:41:55,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:41:55,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 14:41:55,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:41:55,259 INFO L87 Difference]: Start difference. First operand has 34 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 14:41:55,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:41:55,355 INFO L93 Difference]: Finished difference Result 61 states and 90 transitions. [2021-05-02 14:41:55,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 14:41:55,356 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2021-05-02 14:41:55,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:41:55,361 INFO L225 Difference]: With dead ends: 61 [2021-05-02 14:41:55,361 INFO L226 Difference]: Without dead ends: 29 [2021-05-02 14:41:55,363 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:41:55,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-02 14:41:55,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-05-02 14:41:55,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 14:41:55,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2021-05-02 14:41:55,391 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 34 [2021-05-02 14:41:55,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:41:55,391 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2021-05-02 14:41:55,391 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 14:41:55,391 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2021-05-02 14:41:55,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-02 14:41:55,393 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:41:55,393 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:41:55,393 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 14:41:55,393 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:41:55,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:41:55,394 INFO L82 PathProgramCache]: Analyzing trace with hash -245963777, now seen corresponding path program 1 times [2021-05-02 14:41:55,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:41:55,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220670453] [2021-05-02 14:41:55,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:41:55,408 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:41:55,408 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [394580877] [2021-05-02 14:41:55,409 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 14:41:55,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:41:55,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 14:41:55,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:41:55,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:41:55,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:41:55,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:41:55,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:41:55,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:41:55,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:41:55,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:41:55,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:41:55,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:41:55,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:41:55,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:41:55,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:41:55,762 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 14:41:55,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:41:55,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220670453] [2021-05-02 14:41:55,763 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:41:55,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394580877] [2021-05-02 14:41:55,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394580877] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:41:55,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:41:55,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 14:41:55,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497316977] [2021-05-02 14:41:55,764 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 14:41:55,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:41:55,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 14:41:55,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:41:55,765 INFO L87 Difference]: Start difference. First operand 29 states and 35 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, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 14:41:55,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:41:55,953 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2021-05-02 14:41:55,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 14:41:55,954 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, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 35 [2021-05-02 14:41:55,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:41:55,955 INFO L225 Difference]: With dead ends: 44 [2021-05-02 14:41:55,955 INFO L226 Difference]: Without dead ends: 41 [2021-05-02 14:41:55,956 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 112.8ms TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-05-02 14:41:55,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-02 14:41:55,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2021-05-02 14:41:55,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 25 states have (on average 1.24) internal successors, (31), 26 states have internal predecessors, (31), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 14:41:55,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2021-05-02 14:41:55,962 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 35 [2021-05-02 14:41:55,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:41:55,963 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2021-05-02 14:41:55,963 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, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 14:41:55,963 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2021-05-02 14:41:55,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-02 14:41:55,964 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:41:55,964 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 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 14:41:56,179 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 14:41:56,181 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:41:56,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:41:56,182 INFO L82 PathProgramCache]: Analyzing trace with hash 397552474, now seen corresponding path program 1 times [2021-05-02 14:41:56,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:41:56,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929340753] [2021-05-02 14:41:56,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:41:56,202 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:41:56,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1182100433] [2021-05-02 14:41:56,203 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 14:41:56,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:41:56,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 14:41:56,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:41:56,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:41:56,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:41:56,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:41:56,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:41:56,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:41:56,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:41:56,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:41:56,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:41:56,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:41:56,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:41:56,533 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 14:41:56,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:41:56,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929340753] [2021-05-02 14:41:56,533 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:41:56,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182100433] [2021-05-02 14:41:56,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182100433] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:41:56,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:41:56,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 14:41:56,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545074608] [2021-05-02 14:41:56,534 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 14:41:56,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:41:56,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 14:41:56,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:41:56,535 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 14:41:56,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:41:56,719 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2021-05-02 14:41:56,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 14:41:56,720 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 37 [2021-05-02 14:41:56,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:41:56,721 INFO L225 Difference]: With dead ends: 57 [2021-05-02 14:41:56,721 INFO L226 Difference]: Without dead ends: 54 [2021-05-02 14:41:56,721 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 106.2ms TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-05-02 14:41:56,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-02 14:41:56,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 37. [2021-05-02 14:41:56,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 24 states have internal predecessors, (28), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 14:41:56,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2021-05-02 14:41:56,727 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 37 [2021-05-02 14:41:56,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:41:56,727 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2021-05-02 14:41:56,727 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 14:41:56,727 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2021-05-02 14:41:56,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-02 14:41:56,728 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:41:56,728 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:41:56,937 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:41:56,937 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:41:56,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:41:56,938 INFO L82 PathProgramCache]: Analyzing trace with hash -382866049, now seen corresponding path program 1 times [2021-05-02 14:41:56,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:41:56,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789992522] [2021-05-02 14:41:56,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:41:56,950 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:41:56,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1567723583] [2021-05-02 14:41:56,950 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 14:41:56,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:41:56,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-02 14:41:56,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:41:57,076 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 14:41:57,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:41:57,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789992522] [2021-05-02 14:41:57,077 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:41:57,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567723583] [2021-05-02 14:41:57,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567723583] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:41:57,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:41:57,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 14:41:57,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753745614] [2021-05-02 14:41:57,078 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 14:41:57,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:41:57,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 14:41:57,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:41:57,078 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-02 14:41:57,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:41:57,103 INFO L93 Difference]: Finished difference Result 61 states and 73 transitions. [2021-05-02 14:41:57,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 14:41:57,103 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 43 [2021-05-02 14:41:57,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:41:57,104 INFO L225 Difference]: With dead ends: 61 [2021-05-02 14:41:57,104 INFO L226 Difference]: Without dead ends: 39 [2021-05-02 14:41:57,104 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:41:57,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-02 14:41:57,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-05-02 14:41:57,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 25 states have (on average 1.2) internal successors, (30), 26 states have internal predecessors, (30), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 14:41:57,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2021-05-02 14:41:57,120 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 43 [2021-05-02 14:41:57,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:41:57,121 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2021-05-02 14:41:57,121 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-02 14:41:57,121 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2021-05-02 14:41:57,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-02 14:41:57,122 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:41:57,122 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-05-02 14:41:57,323 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:41:57,323 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:41:57,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:41:57,323 INFO L82 PathProgramCache]: Analyzing trace with hash 866494938, now seen corresponding path program 1 times [2021-05-02 14:41:57,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:41:57,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494104074] [2021-05-02 14:41:57,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:41:57,338 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:41:57,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [287317357] [2021-05-02 14:41:57,339 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 14:41:57,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:41:57,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-02 14:41:57,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:41:57,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:41:57,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:41:57,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:41:57,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:41:57,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:41:57,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:41:57,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:41:57,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:41:57,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:41:57,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:41:58,041 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 31 [2021-05-02 14:41:58,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:41:58,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:41:58,326 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 14:41:58,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:41:58,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494104074] [2021-05-02 14:41:58,326 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:41:58,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287317357] [2021-05-02 14:41:58,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287317357] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:41:58,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:41:58,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 14:41:58,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100758069] [2021-05-02 14:41:58,327 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 14:41:58,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:41:58,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 14:41:58,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-02 14:41:58,327 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 14:41:58,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:41:58,691 INFO L93 Difference]: Finished difference Result 66 states and 78 transitions. [2021-05-02 14:41:58,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 14:41:58,692 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 45 [2021-05-02 14:41:58,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:41:58,693 INFO L225 Difference]: With dead ends: 66 [2021-05-02 14:41:58,693 INFO L226 Difference]: Without dead ends: 46 [2021-05-02 14:41:58,693 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 570.5ms TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-05-02 14:41:58,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-02 14:41:58,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-05-02 14:41:58,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 31 states have internal predecessors, (34), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 14:41:58,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2021-05-02 14:41:58,698 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 45 [2021-05-02 14:41:58,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:41:58,698 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2021-05-02 14:41:58,698 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 14:41:58,698 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2021-05-02 14:41:58,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-05-02 14:41:58,699 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:41:58,699 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:41:58,903 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:41:58,903 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:41:58,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:41:58,904 INFO L82 PathProgramCache]: Analyzing trace with hash 2104666202, now seen corresponding path program 2 times [2021-05-02 14:41:58,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:41:58,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608919391] [2021-05-02 14:41:58,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:41:58,912 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:41:58,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1863412792] [2021-05-02 14:41:58,912 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 14:41:59,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:41:59,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:41:59,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 14:41:59,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:41:59,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:41:59,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:41:59,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:41:59,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:41:59,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:41:59,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:41:59,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:41:59,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:41:59,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:41:59,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:42:00,479 WARN L205 SmtUtils]: Spent 557.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 28 [2021-05-02 14:42:00,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:42:00,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:42:06,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:42:06,462 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 14:42:06,463 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:42:06,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608919391] [2021-05-02 14:42:06,463 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:42:06,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863412792] [2021-05-02 14:42:06,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863412792] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:42:06,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:42:06,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 14:42:06,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461604347] [2021-05-02 14:42:06,463 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 14:42:06,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:42:06,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 14:42:06,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:42:06,464 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 14:42:06,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:42:06,964 INFO L93 Difference]: Finished difference Result 66 states and 77 transitions. [2021-05-02 14:42:06,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 14:42:06,965 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 53 [2021-05-02 14:42:06,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:42:06,965 INFO L225 Difference]: With dead ends: 66 [2021-05-02 14:42:06,965 INFO L226 Difference]: Without dead ends: 48 [2021-05-02 14:42:06,966 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 1412.9ms TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-05-02 14:42:06,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-02 14:42:06,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-05-02 14:42:06,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 32 states have (on average 1.125) internal successors, (36), 33 states have internal predecessors, (36), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 14:42:06,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2021-05-02 14:42:06,970 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 53 [2021-05-02 14:42:06,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:42:06,970 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2021-05-02 14:42:06,970 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 14:42:06,970 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2021-05-02 14:42:06,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-02 14:42:06,971 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:42:06,971 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:42:07,183 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 14:42:07,183 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:42:07,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:42:07,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1069215477, now seen corresponding path program 3 times [2021-05-02 14:42:07,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:42:07,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041652027] [2021-05-02 14:42:07,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:42:07,199 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:42:07,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [802326531] [2021-05-02 14:42:07,200 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:42:07,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 14:42:07,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:42:07,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 59 conjunts are in the unsatisfiable core [2021-05-02 14:42:07,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:42:07,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:42:07,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:42:07,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:42:07,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:42:07,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:42:07,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:42:07,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:42:07,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:42:08,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:42:08,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:42:08,556 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2021-05-02 14:42:09,355 WARN L205 SmtUtils]: Spent 657.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2021-05-02 14:42:09,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:42:09,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:42:11,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:42:12,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:42:12,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:42:12,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:42:12,812 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 551 DAG size of output: 555 [2021-05-02 14:42:12,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:42:12,977 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 569 DAG size of output: 571 [2021-05-02 14:42:12,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:39,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:45:39,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041652027] [2021-05-02 14:45:39,371 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:45:39,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802326531] [2021-05-02 14:45:39,372 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: -978752248 [2021-05-02 14:45:39,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:45:39,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-05-02 14:45:39,372 ERROR L212 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2021-05-02 14:45:39,372 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-02 14:45:39,575 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:45:39,586 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-05-02 14:45:39,586 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 02:45:39 BoogieIcfgContainer [2021-05-02 14:45:39,586 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 14:45:39,587 INFO L168 Benchmark]: Toolchain (without parser) took 225186.29 ms. Allocated memory was 223.3 MB in the beginning and 7.3 GB in the end (delta: 7.1 GB). Free memory was 188.7 MB in the beginning and 6.0 GB in the end (delta: -5.8 GB). Peak memory consumption was 5.6 GB. Max. memory is 8.0 GB. [2021-05-02 14:45:39,587 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 223.3 MB. Free memory is still 205.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 14:45:39,587 INFO L168 Benchmark]: CACSL2BoogieTranslator took 188.43 ms. Allocated memory is still 223.3 MB. Free memory was 188.5 MB in the beginning and 206.2 MB in the end (delta: -17.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-05-02 14:45:39,587 INFO L168 Benchmark]: Boogie Preprocessor took 32.18 ms. Allocated memory is still 223.3 MB. Free memory was 206.2 MB in the beginning and 204.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 14:45:39,587 INFO L168 Benchmark]: RCFGBuilder took 321.93 ms. Allocated memory is still 223.3 MB. Free memory was 204.6 MB in the beginning and 188.8 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-02 14:45:39,587 INFO L168 Benchmark]: TraceAbstraction took 224638.44 ms. Allocated memory was 223.3 MB in the beginning and 7.3 GB in the end (delta: 7.1 GB). Free memory was 188.3 MB in the beginning and 6.0 GB in the end (delta: -5.8 GB). Peak memory consumption was 5.6 GB. Max. memory is 8.0 GB. [2021-05-02 14:45:39,587 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 223.3 MB. Free memory is still 205.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 188.43 ms. Allocated memory is still 223.3 MB. Free memory was 188.5 MB in the beginning and 206.2 MB in the end (delta: -17.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 32.18 ms. Allocated memory is still 223.3 MB. Free memory was 206.2 MB in the beginning and 204.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 321.93 ms. Allocated memory is still 223.3 MB. Free memory was 204.6 MB in the beginning and 188.8 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 224638.44 ms. Allocated memory was 223.3 MB in the beginning and 7.3 GB in the end (delta: 7.1 GB). Free memory was 188.3 MB in the beginning and 6.0 GB in the end (delta: -5.8 GB). Peak memory consumption was 5.6 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 21]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L26] unsigned A, B; [L27] unsigned q, r, b; [L28] A = __VERIFIER_nondet_unsigned_int() [L29] CALL assume_abort_if_not(A>=0 && A<=100) [L16] COND FALSE !(!cond) [L29] RET assume_abort_if_not(A>=0 && A<=100) [L30] B = __VERIFIER_nondet_unsigned_int() [L31] CALL assume_abort_if_not(B>=0 && B<=100) [L16] COND FALSE !(!cond) [L31] RET assume_abort_if_not(B>=0 && B<=100) [L32] CALL assume_abort_if_not(B < (0x7fffffff * 2U + 1U)/2) [L16] COND FALSE !(!cond) [L32] RET assume_abort_if_not(B < (0x7fffffff * 2U + 1U)/2) [L33] CALL assume_abort_if_not(B >= 1) [L16] COND FALSE !(!cond) [L33] RET assume_abort_if_not(B >= 1) [L34] q = 0 [L35] r = A [L36] b = B [L37] COND TRUE 1 [L38] COND FALSE !(!(r >= b)) [L39] b = 2 * b [L37] COND TRUE 1 [L38] COND FALSE !(!(r >= b)) [L39] b = 2 * b [L37] COND TRUE 1 [L38] COND TRUE !(r >= b) [L41] COND TRUE 1 [L42] CALL __VERIFIER_assert(A == q * b + r) [L19] COND FALSE !(!(cond)) [L42] RET __VERIFIER_assert(A == q * b + r) [L43] COND FALSE !(!(b != B)) [L44] q = 2 * q [L45] b = b / 2 [L46] COND TRUE r >= b [L47] q = q + 1 [L48] r = r - b [L41] COND TRUE 1 [L42] CALL __VERIFIER_assert(A == q * b + r) [L19] COND FALSE !(!(cond)) [L42] RET __VERIFIER_assert(A == q * b + r) [L43] COND FALSE !(!(b != B)) [L44] q = 2 * q [L45] b = b / 2 [L46] COND TRUE r >= b [L47] q = q + 1 [L48] r = r - b [L41] COND TRUE 1 [L42] CALL __VERIFIER_assert(A == q * b + r) [L19] COND TRUE !(cond) [L21] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 37 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 224581.8ms, OverallIterations: 7, TraceHistogramMax: 4, EmptinessCheckTime: 12.5ms, AutomataDifference: 1385.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 12.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 168 SDtfs, 138 SDslu, 624 SDs, 0 SdLazy, 583 SolverSat, 68 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 637.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 246 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 2247.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=48occurred in iteration=6, InterpolantAutomatonStates: 52, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 54.9ms AutomataMinimizationTime, 6 MinimizatonAttempts, 19 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 57.1ms SsaConstructionTime, 408.8ms SatisfiabilityAnalysisTime, 8946.3ms InterpolantComputationTime, 247 NumberOfCodeBlocks, 247 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 241 ConstructedInterpolants, 0 QuantifiedInterpolants, 1312 SizeOfPredicates, 16 NumberOfNonLiveVariables, 667 ConjunctsInSsa, 106 ConjunctsInUnsatCore, 6 InterpolantComputations, 2 PerfectInterpolantSequences, 135/174 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...