/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/hard-u_valuebound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 03:26:32,211 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 03:26:32,214 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 03:26:32,251 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 03:26:32,271 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 03:26:32,272 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 03:26:32,274 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 03:26:32,275 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 03:26:32,277 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 03:26:32,278 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 03:26:32,281 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 03:26:32,286 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 03:26:32,287 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 03:26:32,289 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 03:26:32,290 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 03:26:32,292 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 03:26:32,297 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 03:26:32,305 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 03:26:32,307 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 03:26:32,308 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 03:26:32,312 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 [2021-05-06 03:26:32,348 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 03:26:32,348 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 03:26:32,351 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 03:26:32,351 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 03:26:32,351 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 03:26:32,352 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 03:26:32,352 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 03:26:32,352 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 03:26:32,352 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 03:26:32,353 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 03:26:32,354 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 03:26:32,354 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 03:26:32,354 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 03:26:32,354 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 03:26:32,354 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 03:26:32,354 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 03:26:32,355 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 03:26:32,355 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 03:26:32,355 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 03:26:32,355 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 03:26:32,355 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 03:26:32,356 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 03:26:32,356 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 03:26:32,356 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 03:26:32,356 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 03:26:32,356 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 03:26:32,356 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 03:26:32,357 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 03:26:32,357 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 03:26:32,721 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 03:26:32,754 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 03:26:32,756 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 03:26:32,757 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 03:26:32,769 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 03:26:32,770 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound100.c [2021-05-06 03:26:32,830 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fdc632699/d526a3d247644514846010953f258815/FLAGc3bde080a [2021-05-06 03:26:33,263 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 03:26:33,263 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound100.c [2021-05-06 03:26:33,268 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fdc632699/d526a3d247644514846010953f258815/FLAGc3bde080a [2021-05-06 03:26:33,664 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fdc632699/d526a3d247644514846010953f258815 [2021-05-06 03:26:33,667 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 03:26:33,669 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 03:26:33,670 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 03:26:33,670 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 03:26:33,674 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 03:26:33,676 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 03:26:33" (1/1) ... [2021-05-06 03:26:33,677 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@116f37c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:26:33, skipping insertion in model container [2021-05-06 03:26:33,677 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 03:26:33" (1/1) ... [2021-05-06 03:26:33,687 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 03:26:33,702 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 03:26:33,799 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/hard-u_valuebound100.c[545,558] [2021-05-06 03:26:33,814 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 03:26:33,821 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 03:26:33,837 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/hard-u_valuebound100.c[545,558] [2021-05-06 03:26:33,865 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 03:26:33,878 INFO L208 MainTranslator]: Completed translation [2021-05-06 03:26:33,878 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:26:33 WrapperNode [2021-05-06 03:26:33,879 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 03:26:33,880 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 03:26:33,880 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 03:26:33,881 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 03:26:33,890 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:26:33" (1/1) ... [2021-05-06 03:26:33,891 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:26:33" (1/1) ... [2021-05-06 03:26:33,905 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:26:33" (1/1) ... [2021-05-06 03:26:33,906 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:26:33" (1/1) ... [2021-05-06 03:26:33,921 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:26:33" (1/1) ... [2021-05-06 03:26:33,925 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:26:33" (1/1) ... [2021-05-06 03:26:33,926 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:26:33" (1/1) ... [2021-05-06 03:26:33,927 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 03:26:33,928 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 03:26:33,928 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 03:26:33,928 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 03:26:33,929 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:26:33" (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 [2021-05-06 03:26:34,047 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 03:26:34,047 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 03:26:34,047 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 03:26:34,047 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 03:26:34,048 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 03:26:34,048 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 03:26:34,048 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 03:26:34,048 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 03:26:34,048 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 03:26:34,049 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 03:26:34,049 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-06 03:26:34,049 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 03:26:34,049 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 03:26:34,049 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 03:26:34,050 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 03:26:34,050 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 03:26:34,050 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 03:26:34,050 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 03:26:34,051 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 03:26:34,051 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 03:26:34,400 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 03:26:34,401 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 03:26:34,402 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 03:26:34 BoogieIcfgContainer [2021-05-06 03:26:34,402 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 03:26:34,403 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 03:26:34,404 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 03:26:34,406 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 03:26:34,407 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 03:26:33" (1/3) ... [2021-05-06 03:26:34,407 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cf1c05f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 03:26:34, skipping insertion in model container [2021-05-06 03:26:34,408 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:26:33" (2/3) ... [2021-05-06 03:26:34,408 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cf1c05f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 03:26:34, skipping insertion in model container [2021-05-06 03:26:34,408 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 03:26:34" (3/3) ... [2021-05-06 03:26:34,409 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-u_valuebound100.c [2021-05-06 03:26:34,414 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 03:26:34,417 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 03:26:34,433 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 03:26:34,453 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 03:26:34,454 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 03:26:34,454 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 03:26:34,454 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 03:26:34,454 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 03:26:34,454 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 03:26:34,454 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 03:26:34,454 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 03:26:34,468 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 03:26:34,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 03:26:34,473 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:26:34,474 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:26:34,474 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:26:34,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:26:34,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1784424332, now seen corresponding path program 1 times [2021-05-06 03:26:34,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:26:34,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900977146] [2021-05-06 03:26:34,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:26:34,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:26:34,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 03:26:34,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:26:34,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 03:26:34,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:26:34,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 03:26:34,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:26:34,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 03:26:34,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:26:34,766 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 03:26:34,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:26:34,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900977146] [2021-05-06 03:26:34,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900977146] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:26:34,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:26:34,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 03:26:34,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868357020] [2021-05-06 03:26:34,772 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 03:26:34,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:26:34,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 03:26:34,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 03:26:34,784 INFO L87 Difference]: Start difference. First operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 03:26:34,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:26:34,916 INFO L93 Difference]: Finished difference Result 69 states and 110 transitions. [2021-05-06 03:26:34,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 03:26:34,918 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2021-05-06 03:26:34,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:26:34,925 INFO L225 Difference]: With dead ends: 69 [2021-05-06 03:26:34,925 INFO L226 Difference]: Without dead ends: 33 [2021-05-06 03:26:34,928 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 55.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 03:26:34,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-06 03:26:34,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-06 03:26:34,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 03:26:34,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2021-05-06 03:26:34,982 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 28 [2021-05-06 03:26:34,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:26:34,983 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2021-05-06 03:26:34,983 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 03:26:34,983 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2021-05-06 03:26:34,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 03:26:34,985 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:26:34,985 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:26:34,985 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 03:26:34,985 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:26:34,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:26:34,986 INFO L82 PathProgramCache]: Analyzing trace with hash 1361835634, now seen corresponding path program 1 times [2021-05-06 03:26:34,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:26:34,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175447393] [2021-05-06 03:26:34,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:26:35,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:26:35,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 03:26:35,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:26:35,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 03:26:35,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:26:35,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 03:26:35,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:26:35,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 03:26:35,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:26:35,143 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 03:26:35,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:26:35,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175447393] [2021-05-06 03:26:35,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175447393] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:26:35,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:26:35,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 03:26:35,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551822821] [2021-05-06 03:26:35,146 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 03:26:35,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:26:35,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 03:26:35,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:26:35,147 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 03:26:35,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:26:35,568 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2021-05-06 03:26:35,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 03:26:35,569 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2021-05-06 03:26:35,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:26:35,572 INFO L225 Difference]: With dead ends: 46 [2021-05-06 03:26:35,572 INFO L226 Difference]: Without dead ends: 44 [2021-05-06 03:26:35,573 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 168.5ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 03:26:35,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-06 03:26:35,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2021-05-06 03:26:35,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 12 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 03:26:35,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2021-05-06 03:26:35,603 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 28 [2021-05-06 03:26:35,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:26:35,606 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2021-05-06 03:26:35,606 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 03:26:35,606 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2021-05-06 03:26:35,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 03:26:35,607 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:26:35,607 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:26:35,607 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 03:26:35,607 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:26:35,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:26:35,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1382067636, now seen corresponding path program 1 times [2021-05-06 03:26:35,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:26:35,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557494824] [2021-05-06 03:26:35,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:26:35,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:26:35,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 03:26:35,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:26:35,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 03:26:35,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:26:35,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 03:26:35,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:26:35,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 03:26:35,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:26:35,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-05-06 03:26:35,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:26:35,908 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 03:26:35,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:26:35,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557494824] [2021-05-06 03:26:35,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557494824] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:26:35,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:26:35,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 03:26:35,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24188840] [2021-05-06 03:26:35,910 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 03:26:35,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:26:35,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 03:26:35,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:26:35,911 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 03:26:36,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:26:36,298 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2021-05-06 03:26:36,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 03:26:36,299 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-06 03:26:36,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:26:36,302 INFO L225 Difference]: With dead ends: 50 [2021-05-06 03:26:36,302 INFO L226 Difference]: Without dead ends: 48 [2021-05-06 03:26:36,302 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 230.0ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 03:26:36,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-06 03:26:36,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2021-05-06 03:26:36,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 03:26:36,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2021-05-06 03:26:36,330 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 33 [2021-05-06 03:26:36,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:26:36,331 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2021-05-06 03:26:36,331 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 03:26:36,331 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2021-05-06 03:26:36,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-06 03:26:36,333 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:26:36,333 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:26:36,333 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-06 03:26:36,334 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:26:36,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:26:36,335 INFO L82 PathProgramCache]: Analyzing trace with hash -1455208590, now seen corresponding path program 1 times [2021-05-06 03:26:36,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:26:36,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285964632] [2021-05-06 03:26:36,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:26:36,353 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:26:36,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [150007413] [2021-05-06 03:26:36,354 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 [2021-05-06 03:26:36,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:26:36,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 03:26:36,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:26:36,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:26:36,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:26:36,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:26:36,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:26:36,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:26:36,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:26:36,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:26:36,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:26:36,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:26:36,808 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-05-06 03:26:36,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:26:36,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285964632] [2021-05-06 03:26:36,808 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:26:36,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150007413] [2021-05-06 03:26:36,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150007413] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:26:36,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:26:36,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 03:26:36,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410205367] [2021-05-06 03:26:36,810 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 03:26:36,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:26:36,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 03:26:36,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 03:26:36,811 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 03:26:39,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:26:39,186 INFO L93 Difference]: Finished difference Result 64 states and 83 transitions. [2021-05-06 03:26:39,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 03:26:39,187 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 38 [2021-05-06 03:26:39,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:26:39,188 INFO L225 Difference]: With dead ends: 64 [2021-05-06 03:26:39,188 INFO L226 Difference]: Without dead ends: 61 [2021-05-06 03:26:39,188 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 71.2ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-06 03:26:39,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-05-06 03:26:39,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 55. [2021-05-06 03:26:39,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 30 states have (on average 1.2) internal successors, (36), 32 states have internal predecessors, (36), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 03:26:39,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 69 transitions. [2021-05-06 03:26:39,200 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 69 transitions. Word has length 38 [2021-05-06 03:26:39,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:26:39,200 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 69 transitions. [2021-05-06 03:26:39,201 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 03:26:39,201 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 69 transitions. [2021-05-06 03:26:39,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-06 03:26:39,202 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:26:39,202 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:26:39,409 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:26:39,410 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:26:39,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:26:39,410 INFO L82 PathProgramCache]: Analyzing trace with hash -1688067263, now seen corresponding path program 1 times [2021-05-06 03:26:39,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:26:39,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845612137] [2021-05-06 03:26:39,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:26:39,418 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:26:39,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1883314658] [2021-05-06 03:26:39,419 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 [2021-05-06 03:26:39,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:26:39,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 03:26:39,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:26:39,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:26:39,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:26:39,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:26:39,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:26:39,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:26:39,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:26:39,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:26:39,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:26:39,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:26:39,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:26:39,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:26:39,835 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-05-06 03:26:39,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:26:39,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845612137] [2021-05-06 03:26:39,836 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:26:39,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883314658] [2021-05-06 03:26:39,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883314658] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:26:39,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:26:39,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 03:26:39,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542783062] [2021-05-06 03:26:39,837 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 03:26:39,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:26:39,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 03:26:39,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 03:26:39,842 INFO L87 Difference]: Start difference. First operand 55 states and 69 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 03:26:40,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:26:40,285 INFO L93 Difference]: Finished difference Result 76 states and 92 transitions. [2021-05-06 03:26:40,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 03:26:40,286 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 45 [2021-05-06 03:26:40,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:26:40,288 INFO L225 Difference]: With dead ends: 76 [2021-05-06 03:26:40,288 INFO L226 Difference]: Without dead ends: 73 [2021-05-06 03:26:40,289 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 153.0ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-06 03:26:40,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-05-06 03:26:40,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2021-05-06 03:26:40,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 44 states have internal predecessors, (49), 20 states have call successors, (20), 10 states have call predecessors, (20), 9 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-06 03:26:40,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 87 transitions. [2021-05-06 03:26:40,306 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 87 transitions. Word has length 45 [2021-05-06 03:26:40,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:26:40,306 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 87 transitions. [2021-05-06 03:26:40,307 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 03:26:40,307 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 87 transitions. [2021-05-06 03:26:40,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-06 03:26:40,315 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:26:40,315 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 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] [2021-05-06 03:26:40,540 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:26:40,541 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:26:40,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:26:40,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1471734606, now seen corresponding path program 1 times [2021-05-06 03:26:40,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:26:40,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867048899] [2021-05-06 03:26:40,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:26:40,552 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:26:40,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1469781862] [2021-05-06 03:26:40,552 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 [2021-05-06 03:26:40,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:26:40,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-06 03:26:40,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:26:40,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:26:40,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:26:40,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:26:40,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:26:40,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:26:40,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:26:40,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:26:40,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:26:40,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:26:40,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:26:40,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:26:40,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:26:41,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:26:41,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:26:41,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:26:41,060 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 21 proven. 11 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-05-06 03:26:41,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:26:41,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867048899] [2021-05-06 03:26:41,060 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:26:41,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469781862] [2021-05-06 03:26:41,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469781862] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:26:41,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:26:41,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 03:26:41,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394024780] [2021-05-06 03:26:41,061 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 03:26:41,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:26:41,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 03:26:41,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-05-06 03:26:41,062 INFO L87 Difference]: Start difference. First operand 72 states and 87 transitions. Second operand has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-06 03:26:46,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:26:46,218 INFO L93 Difference]: Finished difference Result 99 states and 125 transitions. [2021-05-06 03:26:46,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 03:26:46,219 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 55 [2021-05-06 03:26:46,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:26:46,222 INFO L225 Difference]: With dead ends: 99 [2021-05-06 03:26:46,222 INFO L226 Difference]: Without dead ends: 91 [2021-05-06 03:26:46,223 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 198.2ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-05-06 03:26:46,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-05-06 03:26:46,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 85. [2021-05-06 03:26:46,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 49 states have (on average 1.163265306122449) internal successors, (57), 51 states have internal predecessors, (57), 25 states have call successors, (25), 11 states have call predecessors, (25), 10 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2021-05-06 03:26:46,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 105 transitions. [2021-05-06 03:26:46,259 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 105 transitions. Word has length 55 [2021-05-06 03:26:46,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:26:46,259 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 105 transitions. [2021-05-06 03:26:46,260 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-06 03:26:46,260 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 105 transitions. [2021-05-06 03:26:46,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-06 03:26:46,260 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:26:46,261 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:26:46,465 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:26:46,465 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:26:46,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:26:46,466 INFO L82 PathProgramCache]: Analyzing trace with hash 1586192473, now seen corresponding path program 1 times [2021-05-06 03:26:46,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:26:46,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261542736] [2021-05-06 03:26:46,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:26:46,474 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:26:46,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [157280319] [2021-05-06 03:26:46,475 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