/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_valuebound10.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 14:40:10,238 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 14:40:10,240 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 14:40:10,271 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 14:40:10,292 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 14:40:10,294 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 14:40:10,295 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 14:40:10,296 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 14:40:10,299 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 14:40:10,299 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 14:40:10,301 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 14:40:10,305 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 14:40:10,306 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 14:40:10,308 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 14:40:10,308 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 14:40:10,310 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 14:40:10,311 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 14:40:10,317 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 14:40:10,317 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 14:40:10,318 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 14:40:10,319 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 14:40:10,351 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 14:40:10,351 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 14:40:10,353 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 14:40:10,354 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 14:40:10,354 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 14:40:10,354 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 14:40:10,354 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 14:40:10,354 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 14:40:10,354 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 14:40:10,354 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 14:40:10,355 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 14:40:10,355 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 14:40:10,355 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 14:40:10,355 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 14:40:10,355 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 14:40:10,355 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 14:40:10,355 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 14:40:10,356 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 14:40:10,356 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 14:40:10,356 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 14:40:10,356 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 14:40:10,356 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 14:40:10,356 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 14:40:10,356 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 14:40:10,356 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 14:40:10,356 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 14:40:10,357 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 14:40:10,357 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 14:40:10,357 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 14:40:10,561 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 14:40:10,580 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 14:40:10,582 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 14:40:10,583 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 14:40:10,584 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 14:40:10,584 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/divbin_valuebound10.i [2021-05-02 14:40:10,634 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c4a3c108/c4ccdcbc13a8441eba8ed48ec0e04df5/FLAGe32f3f2a6 [2021-05-02 14:40:11,012 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 14:40:11,013 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin_valuebound10.i [2021-05-02 14:40:11,018 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c4a3c108/c4ccdcbc13a8441eba8ed48ec0e04df5/FLAGe32f3f2a6 [2021-05-02 14:40:11,031 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c4a3c108/c4ccdcbc13a8441eba8ed48ec0e04df5 [2021-05-02 14:40:11,033 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 14:40:11,034 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 14:40:11,036 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 14:40:11,036 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 14:40:11,038 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 14:40:11,039 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 02:40:11" (1/1) ... [2021-05-02 14:40:11,040 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2fec9de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:40:11, skipping insertion in model container [2021-05-02 14:40:11,040 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 02:40:11" (1/1) ... [2021-05-02 14:40:11,044 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 14:40:11,055 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 14:40:11,145 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_valuebound10.i[958,971] [2021-05-02 14:40:11,171 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 14:40:11,176 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 14:40:11,222 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_valuebound10.i[958,971] [2021-05-02 14:40:11,238 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 14:40:11,246 INFO L208 MainTranslator]: Completed translation [2021-05-02 14:40:11,247 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:40:11 WrapperNode [2021-05-02 14:40:11,247 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 14:40:11,248 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 14:40:11,248 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 14:40:11,248 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 14:40:11,260 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:40:11" (1/1) ... [2021-05-02 14:40:11,261 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:40:11" (1/1) ... [2021-05-02 14:40:11,265 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:40:11" (1/1) ... [2021-05-02 14:40:11,266 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:40:11" (1/1) ... [2021-05-02 14:40:11,275 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:40:11" (1/1) ... [2021-05-02 14:40:11,279 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:40:11" (1/1) ... [2021-05-02 14:40:11,283 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:40:11" (1/1) ... [2021-05-02 14:40:11,285 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 14:40:11,286 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 14:40:11,286 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 14:40:11,286 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 14:40:11,287 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:40:11" (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 14:40:11,358 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 14:40:11,359 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 14:40:11,359 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 14:40:11,359 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 14:40:11,360 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 14:40:11,360 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 14:40:11,360 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 14:40:11,360 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 14:40:11,360 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-02 14:40:11,361 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-02 14:40:11,361 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 14:40:11,361 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 14:40:11,361 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-02 14:40:11,361 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 14:40:11,363 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 14:40:11,363 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 14:40:11,363 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 14:40:11,363 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 14:40:11,363 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 14:40:11,363 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 14:40:11,363 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 14:40:11,363 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 14:40:11,607 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 14:40:11,607 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 14:40:11,608 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 02:40:11 BoogieIcfgContainer [2021-05-02 14:40:11,608 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 14:40:11,609 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 14:40:11,609 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 14:40:11,611 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 14:40:11,611 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 02:40:11" (1/3) ... [2021-05-02 14:40:11,612 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@372ac5c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 02:40:11, skipping insertion in model container [2021-05-02 14:40:11,612 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:40:11" (2/3) ... [2021-05-02 14:40:11,612 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@372ac5c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 02:40:11, skipping insertion in model container [2021-05-02 14:40:11,612 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 02:40:11" (3/3) ... [2021-05-02 14:40:11,613 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin_valuebound10.i [2021-05-02 14:40:11,616 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 14:40:11,618 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 14:40:11,631 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 14:40:11,658 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 14:40:11,658 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 14:40:11,658 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 14:40:11,658 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 14:40:11,658 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 14:40:11,658 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 14:40:11,658 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 14:40:11,658 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 14:40:11,675 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 14:40:11,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 14:40:11,680 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:40:11,680 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 14:40:11,680 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:40:11,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:40:11,684 INFO L82 PathProgramCache]: Analyzing trace with hash 291922115, now seen corresponding path program 1 times [2021-05-02 14:40:11,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:40:11,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197919548] [2021-05-02 14:40:11,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:40:11,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:40:11,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 14:40:11,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:40:11,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 14:40:11,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:40:11,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 14:40:11,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:40:11,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 14:40:11,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:40:11,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 14:40:11,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:40:11,914 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 14:40:11,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:40:11,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197919548] [2021-05-02 14:40:11,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197919548] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:40:11,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:40:11,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 14:40:11,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690969557] [2021-05-02 14:40:11,918 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 14:40:11,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:40:11,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 14:40:11,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:40:11,929 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 14:40:12,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:40:12,036 INFO L93 Difference]: Finished difference Result 61 states and 90 transitions. [2021-05-02 14:40:12,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 14:40:12,038 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 14:40:12,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:40:12,042 INFO L225 Difference]: With dead ends: 61 [2021-05-02 14:40:12,043 INFO L226 Difference]: Without dead ends: 29 [2021-05-02 14:40:12,045 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:40:12,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-02 14:40:12,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-05-02 14:40:12,072 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 14:40:12,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2021-05-02 14:40:12,074 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 34 [2021-05-02 14:40:12,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:40:12,074 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2021-05-02 14:40:12,075 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 14:40:12,075 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2021-05-02 14:40:12,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-02 14:40:12,076 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:40:12,076 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 14:40:12,076 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 14:40:12,076 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:40:12,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:40:12,077 INFO L82 PathProgramCache]: Analyzing trace with hash -245963777, now seen corresponding path program 1 times [2021-05-02 14:40:12,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:40:12,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028814358] [2021-05-02 14:40:12,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:40:12,094 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:40:12,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1477728610] [2021-05-02 14:40:12,095 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 14:40:12,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:40:12,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 14:40:12,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:40:12,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:40:12,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:40:12,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:40:12,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:40:12,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:40:12,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:40:12,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:40:12,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:40:12,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:40:12,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:40:12,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:40:12,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:40:12,548 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 14:40:12,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:40:12,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028814358] [2021-05-02 14:40:12,549 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:40:12,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477728610] [2021-05-02 14:40:12,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477728610] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:40:12,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:40:12,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 14:40:12,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494748578] [2021-05-02 14:40:12,552 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 14:40:12,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:40:12,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 14:40:12,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:40:12,557 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 14:40:12,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:40:12,780 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2021-05-02 14:40:12,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 14:40:12,781 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 14:40:12,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:40:12,783 INFO L225 Difference]: With dead ends: 44 [2021-05-02 14:40:12,783 INFO L226 Difference]: Without dead ends: 41 [2021-05-02 14:40:12,783 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 127.4ms TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-05-02 14:40:12,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-02 14:40:12,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2021-05-02 14:40:12,788 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 14:40:12,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2021-05-02 14:40:12,789 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 35 [2021-05-02 14:40:12,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:40:12,790 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2021-05-02 14:40:12,790 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 14:40:12,790 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2021-05-02 14:40:12,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-02 14:40:12,791 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:40:12,791 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 14:40:13,010 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 14:40:13,011 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:40:13,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:40:13,011 INFO L82 PathProgramCache]: Analyzing trace with hash 397552474, now seen corresponding path program 1 times [2021-05-02 14:40:13,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:40:13,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803824309] [2021-05-02 14:40:13,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:40:13,022 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:40:13,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2083502480] [2021-05-02 14:40:13,022 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 14:40:13,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:40:13,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 14:40:13,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:40:13,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:40:13,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:40:13,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:40:13,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:40:13,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:40:13,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:40:13,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:40:13,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:40:13,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:40:13,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:40:13,397 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 14:40:13,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:40:13,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803824309] [2021-05-02 14:40:13,397 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:40:13,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083502480] [2021-05-02 14:40:13,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083502480] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:40:13,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:40:13,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 14:40:13,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17476762] [2021-05-02 14:40:13,398 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 14:40:13,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:40:13,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 14:40:13,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:40:13,398 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 14:40:13,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:40:13,621 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2021-05-02 14:40:13,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 14:40:13,622 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 14:40:13,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:40:13,623 INFO L225 Difference]: With dead ends: 57 [2021-05-02 14:40:13,623 INFO L226 Difference]: Without dead ends: 54 [2021-05-02 14:40:13,623 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 124.2ms TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-05-02 14:40:13,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-02 14:40:13,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 37. [2021-05-02 14:40:13,643 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 14:40:13,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2021-05-02 14:40:13,644 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 37 [2021-05-02 14:40:13,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:40:13,644 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2021-05-02 14:40:13,645 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 14:40:13,645 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2021-05-02 14:40:13,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-02 14:40:13,645 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:40:13,645 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 14:40:13,846 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:40:13,846 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:40:13,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:40:13,847 INFO L82 PathProgramCache]: Analyzing trace with hash -382866049, now seen corresponding path program 1 times [2021-05-02 14:40:13,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:40:13,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594092569] [2021-05-02 14:40:13,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:40:13,859 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:40:13,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [307188863] [2021-05-02 14:40:13,860 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 14:40:13,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:40:13,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-02 14:40:13,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:40:13,971 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 14:40:13,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:40:13,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594092569] [2021-05-02 14:40:13,971 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:40:13,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307188863] [2021-05-02 14:40:13,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307188863] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:40:13,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:40:13,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 14:40:13,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334702507] [2021-05-02 14:40:13,973 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 14:40:13,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:40:13,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 14:40:13,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:40:13,973 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 14:40:13,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:40:13,993 INFO L93 Difference]: Finished difference Result 61 states and 73 transitions. [2021-05-02 14:40:13,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 14:40:13,994 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 14:40:13,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:40:13,996 INFO L225 Difference]: With dead ends: 61 [2021-05-02 14:40:13,996 INFO L226 Difference]: Without dead ends: 39 [2021-05-02 14:40:13,996 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:40:13,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-02 14:40:14,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-05-02 14:40:14,005 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 14:40:14,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2021-05-02 14:40:14,013 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 43 [2021-05-02 14:40:14,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:40:14,014 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2021-05-02 14:40:14,015 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 14:40:14,015 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2021-05-02 14:40:14,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-02 14:40:14,015 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:40:14,016 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 14:40:14,216 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:40:14,218 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:40:14,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:40:14,219 INFO L82 PathProgramCache]: Analyzing trace with hash 866494938, now seen corresponding path program 1 times [2021-05-02 14:40:14,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:40:14,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378327508] [2021-05-02 14:40:14,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:40:14,228 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:40:14,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1913787332] [2021-05-02 14:40:14,228 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 14:40:14,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:40:14,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 14:40:14,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:40:14,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:40:14,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:40:14,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:40:14,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:40:14,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:40:14,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:40:14,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:40:14,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:40:14,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:40:14,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:40:14,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:40:14,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:40:14,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:40:14,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:40:14,870 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 14:40:14,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:40:14,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378327508] [2021-05-02 14:40:14,871 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:40:14,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913787332] [2021-05-02 14:40:14,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913787332] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:40:14,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:40:14,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 14:40:14,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4934886] [2021-05-02 14:40:14,871 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 14:40:14,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:40:14,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 14:40:14,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-02 14:40:14,872 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 14:40:15,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:40:15,163 INFO L93 Difference]: Finished difference Result 52 states and 61 transitions. [2021-05-02 14:40:15,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 14:40:15,164 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 14:40:15,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:40:15,165 INFO L225 Difference]: With dead ends: 52 [2021-05-02 14:40:15,165 INFO L226 Difference]: Without dead ends: 49 [2021-05-02 14:40:15,165 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 290.9ms TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-05-02 14:40:15,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-05-02 14:40:15,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2021-05-02 14:40:15,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 31 states have internal predecessors, (35), 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 14:40:15,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2021-05-02 14:40:15,170 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 45 [2021-05-02 14:40:15,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:40:15,170 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2021-05-02 14:40:15,170 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 14:40:15,170 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2021-05-02 14:40:15,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-05-02 14:40:15,171 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:40:15,171 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 14:40:15,374 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:40:15,374 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:40:15,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:40:15,374 INFO L82 PathProgramCache]: Analyzing trace with hash 2104666202, now seen corresponding path program 2 times [2021-05-02 14:40:15,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:40:15,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906046101] [2021-05-02 14:40:15,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:40:15,383 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:40:15,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1107623622] [2021-05-02 14:40:15,384 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 14:40:15,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:40:15,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:40:15,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 14:40:15,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:40:15,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:40:15,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:40:15,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:40:15,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:40:15,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:40:15,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:40:15,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:40:15,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:40:16,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:40:16,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:40:16,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:40:17,182 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 14:40:17,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:40:17,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906046101] [2021-05-02 14:40:17,182 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:40:17,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107623622] [2021-05-02 14:40:17,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107623622] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:40:17,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:40:17,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 14:40:17,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226580939] [2021-05-02 14:40:17,183 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 14:40:17,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:40:17,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 14:40:17,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:40:17,183 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand has 11 states, 10 states have (on average 2.8) internal successors, (28), 9 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 14:40:17,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:40:17,376 INFO L93 Difference]: Finished difference Result 83 states and 97 transitions. [2021-05-02 14:40:17,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 14:40:17,377 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.8) internal successors, (28), 9 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 14:40:17,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:40:17,378 INFO L225 Difference]: With dead ends: 83 [2021-05-02 14:40:17,378 INFO L226 Difference]: Without dead ends: 50 [2021-05-02 14:40:17,378 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 242.9ms TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-05-02 14:40:17,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-02 14:40:17,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2021-05-02 14:40:17,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 32 states have (on average 1.15625) internal successors, (37), 33 states have internal predecessors, (37), 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 14:40:17,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2021-05-02 14:40:17,383 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 53 [2021-05-02 14:40:17,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:40:17,383 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2021-05-02 14:40:17,383 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.8) internal successors, (28), 9 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 14:40:17,383 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2021-05-02 14:40:17,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-02 14:40:17,384 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:40:17,384 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 14:40:17,587 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 14:40:17,587 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:40:17,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:40:17,587 INFO L82 PathProgramCache]: Analyzing trace with hash 1069215477, now seen corresponding path program 3 times [2021-05-02 14:40:17,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:40:17,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685817617] [2021-05-02 14:40:17,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:40:17,596 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:40:17,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [954794489] [2021-05-02 14:40:17,596 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 14:40:18,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 14:40:18,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:40:18,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 63 conjunts are in the unsatisfiable core [2021-05-02 14:40:18,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:40:18,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:40:18,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:40:18,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:40:18,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:40:18,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:40:18,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:40:18,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:40:18,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:40:19,201 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2021-05-02 14:40:19,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:40:19,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:40:19,690 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-05-02 14:40:20,207 WARN L205 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2021-05-02 14:40:20,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:40:20,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:40:23,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:40:23,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:40:23,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:40:24,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:40:24,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:40:24,375 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 569 DAG size of output: 571 [2021-05-02 14:40:24,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:43:59,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:43:59,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685817617] [2021-05-02 14:43:59,591 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:43:59,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954794489] [2021-05-02 14:43:59,591 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: -978752248 [2021-05-02 14:43:59,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:43:59,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-05-02 14:43:59,591 ERROR L212 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2021-05-02 14:43:59,591 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-02 14:43:59,794 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:43:59,804 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-05-02 14:43:59,804 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 02:43:59 BoogieIcfgContainer [2021-05-02 14:43:59,804 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 14:43:59,804 INFO L168 Benchmark]: Toolchain (without parser) took 228770.17 ms. Allocated memory was 212.9 MB in the beginning and 7.3 GB in the end (delta: 7.1 GB). Free memory was 176.9 MB in the beginning and 5.3 GB in the end (delta: -5.1 GB). Peak memory consumption was 5.5 GB. Max. memory is 8.0 GB. [2021-05-02 14:43:59,805 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 212.9 MB. Free memory is still 193.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 14:43:59,805 INFO L168 Benchmark]: CACSL2BoogieTranslator took 211.56 ms. Allocated memory is still 212.9 MB. Free memory was 176.6 MB in the beginning and 194.9 MB in the end (delta: -18.3 MB). Peak memory consumption was 11.0 MB. Max. memory is 8.0 GB. [2021-05-02 14:43:59,805 INFO L168 Benchmark]: Boogie Preprocessor took 37.47 ms. Allocated memory is still 212.9 MB. Free memory was 194.9 MB in the beginning and 193.8 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 14:43:59,805 INFO L168 Benchmark]: RCFGBuilder took 321.98 ms. Allocated memory is still 212.9 MB. Free memory was 193.3 MB in the beginning and 177.6 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-02 14:43:59,805 INFO L168 Benchmark]: TraceAbstraction took 228195.02 ms. Allocated memory was 212.9 MB in the beginning and 7.3 GB in the end (delta: 7.1 GB). Free memory was 177.1 MB in the beginning and 5.3 GB in the end (delta: -5.1 GB). Peak memory consumption was 5.5 GB. Max. memory is 8.0 GB. [2021-05-02 14:43:59,805 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 212.9 MB. Free memory is still 193.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 211.56 ms. Allocated memory is still 212.9 MB. Free memory was 176.6 MB in the beginning and 194.9 MB in the end (delta: -18.3 MB). Peak memory consumption was 11.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 37.47 ms. Allocated memory is still 212.9 MB. Free memory was 194.9 MB in the beginning and 193.8 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 321.98 ms. Allocated memory is still 212.9 MB. Free memory was 193.3 MB in the beginning and 177.6 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 228195.02 ms. Allocated memory was 212.9 MB in the beginning and 7.3 GB in the end (delta: 7.1 GB). Free memory was 177.1 MB in the beginning and 5.3 GB in the end (delta: -5.1 GB). Peak memory consumption was 5.5 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<=10) [L16] COND FALSE !(!cond) [L29] RET assume_abort_if_not(A>=0 && A<=10) [L30] B = __VERIFIER_nondet_unsigned_int() [L31] CALL assume_abort_if_not(B>=0 && B<=10) [L16] COND FALSE !(!cond) [L31] RET assume_abort_if_not(B>=0 && B<=10) [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: 228138.4ms, OverallIterations: 7, TraceHistogramMax: 4, EmptinessCheckTime: 11.0ms, AutomataDifference: 1092.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 14.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 169 SDtfs, 131 SDslu, 556 SDs, 0 SdLazy, 580 SolverSat, 66 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 585.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 242 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 823.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=48occurred in iteration=6, InterpolantAutomatonStates: 54, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 71.4ms AutomataMinimizationTime, 6 MinimizatonAttempts, 24 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 68.5ms SsaConstructionTime, 363.3ms SatisfiabilityAnalysisTime, 2992.1ms InterpolantComputationTime, 247 NumberOfCodeBlocks, 247 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 241 ConstructedInterpolants, 0 QuantifiedInterpolants, 1229 SizeOfPredicates, 15 NumberOfNonLiveVariables, 667 ConjunctsInSsa, 102 ConjunctsInUnsatCore, 6 InterpolantComputations, 2 PerfectInterpolantSequences, 136/174 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...