/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_valuebound1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 02:13:30,004 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 02:13:30,007 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 02:13:30,047 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 02:13:30,067 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 02:13:30,069 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 02:13:30,070 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 02:13:30,072 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 02:13:30,074 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 02:13:30,075 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 02:13:30,077 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 02:13:30,083 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 02:13:30,084 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 02:13:30,086 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 02:13:30,088 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 02:13:30,090 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 02:13:30,096 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 02:13:30,104 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 02:13:30,105 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 02:13:30,105 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 02:13:30,109 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 02:13:30,146 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 02:13:30,146 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 02:13:30,149 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 02:13:30,149 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 02:13:30,149 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 02:13:30,149 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 02:13:30,150 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 02:13:30,150 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 02:13:30,150 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 02:13:30,150 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 02:13:30,151 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 02:13:30,151 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 02:13:30,151 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 02:13:30,152 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 02:13:30,152 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 02:13:30,152 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 02:13:30,152 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 02:13:30,152 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 02:13:30,152 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 02:13:30,153 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 02:13:30,153 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 02:13:30,153 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 02:13:30,153 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 02:13:30,154 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 02:13:30,154 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 02:13:30,154 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 02:13:30,154 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 02:13:30,154 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 02:13:30,155 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 02:13:30,711 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 02:13:30,758 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 02:13:30,760 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 02:13:30,761 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 02:13:30,797 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 02:13:30,798 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/divbin_valuebound1.i [2021-05-06 02:13:30,899 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a9f56e68a/d9bf6219d2af4297b45466540e8f0b32/FLAGea0b619b2 [2021-05-06 02:13:31,688 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 02:13:31,689 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin_valuebound1.i [2021-05-06 02:13:31,696 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a9f56e68a/d9bf6219d2af4297b45466540e8f0b32/FLAGea0b619b2 [2021-05-06 02:13:31,954 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a9f56e68a/d9bf6219d2af4297b45466540e8f0b32 [2021-05-06 02:13:31,970 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 02:13:31,972 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 02:13:31,976 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 02:13:31,976 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 02:13:31,979 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 02:13:31,981 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 02:13:31" (1/1) ... [2021-05-06 02:13:31,982 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@386e4847 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:13:31, skipping insertion in model container [2021-05-06 02:13:31,982 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 02:13:31" (1/1) ... [2021-05-06 02:13:31,988 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 02:13:32,031 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 02:13:32,247 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_valuebound1.i[958,971] [2021-05-06 02:13:32,271 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 02:13:32,279 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 02:13:32,306 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_valuebound1.i[958,971] [2021-05-06 02:13:32,345 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 02:13:32,360 INFO L208 MainTranslator]: Completed translation [2021-05-06 02:13:32,361 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:13:32 WrapperNode [2021-05-06 02:13:32,362 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 02:13:32,363 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 02:13:32,363 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 02:13:32,364 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 02:13:32,373 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:13:32" (1/1) ... [2021-05-06 02:13:32,374 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:13:32" (1/1) ... [2021-05-06 02:13:32,381 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:13:32" (1/1) ... [2021-05-06 02:13:32,381 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:13:32" (1/1) ... [2021-05-06 02:13:32,394 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:13:32" (1/1) ... [2021-05-06 02:13:32,398 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:13:32" (1/1) ... [2021-05-06 02:13:32,403 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:13:32" (1/1) ... [2021-05-06 02:13:32,406 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 02:13:32,407 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 02:13:32,407 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 02:13:32,407 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 02:13:32,408 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:13:32" (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 02:13:32,479 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 02:13:32,480 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 02:13:32,480 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 02:13:32,480 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 02:13:32,480 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 02:13:32,480 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 02:13:32,480 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 02:13:32,480 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 02:13:32,481 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-06 02:13:32,481 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-06 02:13:32,481 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 02:13:32,481 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 02:13:32,482 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-06 02:13:32,482 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 02:13:32,482 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 02:13:32,483 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 02:13:32,483 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 02:13:32,483 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 02:13:32,483 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 02:13:32,483 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 02:13:32,483 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 02:13:32,483 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 02:13:32,801 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 02:13:32,801 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 02:13:32,803 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 02:13:32 BoogieIcfgContainer [2021-05-06 02:13:32,803 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 02:13:32,804 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 02:13:32,804 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 02:13:32,807 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 02:13:32,807 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 02:13:31" (1/3) ... [2021-05-06 02:13:32,808 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64e06861 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 02:13:32, skipping insertion in model container [2021-05-06 02:13:32,808 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:13:32" (2/3) ... [2021-05-06 02:13:32,808 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64e06861 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 02:13:32, skipping insertion in model container [2021-05-06 02:13:32,808 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 02:13:32" (3/3) ... [2021-05-06 02:13:32,809 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin_valuebound1.i [2021-05-06 02:13:32,814 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 02:13:32,834 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 02:13:32,861 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 02:13:32,908 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 02:13:32,908 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 02:13:32,908 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 02:13:32,908 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 02:13:32,908 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 02:13:32,908 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 02:13:32,909 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 02:13:32,909 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 02:13:32,933 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) [2021-05-06 02:13:32,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-06 02:13:32,946 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:13:32,947 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] [2021-05-06 02:13:32,947 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:13:32,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:13:32,959 INFO L82 PathProgramCache]: Analyzing trace with hash 291922115, now seen corresponding path program 1 times [2021-05-06 02:13:32,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:13:32,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210669308] [2021-05-06 02:13:32,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:13:33,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:13:33,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 02:13:33,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:13:33,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 02:13:33,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:13:33,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 02:13:33,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:13:33,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 02:13:33,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:13:33,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-06 02:13:33,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:13:33,284 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 02:13:33,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:13:33,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210669308] [2021-05-06 02:13:33,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210669308] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:13:33,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:13:33,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 02:13:33,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667687546] [2021-05-06 02:13:33,291 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 02:13:33,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:13:33,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 02:13:33,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 02:13:33,305 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) [2021-05-06 02:13:33,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:13:33,430 INFO L93 Difference]: Finished difference Result 61 states and 90 transitions. [2021-05-06 02:13:33,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 02:13:33,432 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 [2021-05-06 02:13:33,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:13:33,439 INFO L225 Difference]: With dead ends: 61 [2021-05-06 02:13:33,439 INFO L226 Difference]: Without dead ends: 29 [2021-05-06 02:13:33,442 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 74.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 02:13:33,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-06 02:13:33,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-05-06 02:13:33,503 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) [2021-05-06 02:13:33,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2021-05-06 02:13:33,509 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 34 [2021-05-06 02:13:33,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:13:33,510 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2021-05-06 02:13:33,510 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) [2021-05-06 02:13:33,510 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2021-05-06 02:13:33,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-06 02:13:33,512 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:13:33,512 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] [2021-05-06 02:13:33,521 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 02:13:33,521 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:13:33,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:13:33,529 INFO L82 PathProgramCache]: Analyzing trace with hash -245963777, now seen corresponding path program 1 times [2021-05-06 02:13:33,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:13:33,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646627269] [2021-05-06 02:13:33,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:13:33,548 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:13:33,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [714017735] [2021-05-06 02:13:33,549 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 02:13:33,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:13:33,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 02:13:33,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:13:33,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:13:33,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:13:33,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:13:33,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:13:33,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:13:33,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:13:34,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:13:34,091 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-06 02:13:34,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:13:34,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646627269] [2021-05-06 02:13:34,093 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:13:34,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714017735] [2021-05-06 02:13:34,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714017735] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:13:34,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:13:34,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 02:13:34,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661561408] [2021-05-06 02:13:34,095 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 02:13:34,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:13:34,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 02:13:34,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:13:34,114 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 02:13:34,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:13:34,384 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2021-05-06 02:13:34,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 02:13:34,386 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (7), 2 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 35 [2021-05-06 02:13:34,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:13:34,389 INFO L225 Difference]: With dead ends: 44 [2021-05-06 02:13:34,389 INFO L226 Difference]: Without dead ends: 41 [2021-05-06 02:13:34,391 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 155.9ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:13:34,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-06 02:13:34,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2021-05-06 02:13:34,407 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) [2021-05-06 02:13:34,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2021-05-06 02:13:34,409 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 35 [2021-05-06 02:13:34,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:13:34,410 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2021-05-06 02:13:34,410 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 02:13:34,410 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2021-05-06 02:13:34,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-06 02:13:34,411 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:13:34,411 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] [2021-05-06 02:13:34,636 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 02:13:34,637 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:13:34,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:13:34,637 INFO L82 PathProgramCache]: Analyzing trace with hash 397552474, now seen corresponding path program 1 times [2021-05-06 02:13:34,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:13:34,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912914270] [2021-05-06 02:13:34,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:13:34,653 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:13:34,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1135722892] [2021-05-06 02:13:34,654 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 02:13:34,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:13:34,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-06 02:13:34,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:13:34,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:13:34,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:13:34,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:13:34,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:13:34,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:13:34,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:13:35,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:13:35,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:13:35,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:13:35,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:13:35,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:13:35,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:13:35,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:13:35,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:13:35,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:13:35,315 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-06 02:13:35,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:13:35,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912914270] [2021-05-06 02:13:35,316 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:13:35,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135722892] [2021-05-06 02:13:35,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135722892] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:13:35,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:13:35,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 02:13:35,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181943407] [2021-05-06 02:13:35,317 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 02:13:35,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:13:35,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 02:13:35,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:13:35,329 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand has 11 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 02:13:37,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:13:37,969 INFO L93 Difference]: Finished difference Result 67 states and 79 transitions. [2021-05-06 02:13:37,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 02:13:37,969 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 37 [2021-05-06 02:13:37,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:13:37,970 INFO L225 Difference]: With dead ends: 67 [2021-05-06 02:13:37,970 INFO L226 Difference]: Without dead ends: 40 [2021-05-06 02:13:37,971 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 271.9ms TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-05-06 02:13:37,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-06 02:13:37,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2021-05-06 02:13:37,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 25 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) [2021-05-06 02:13:37,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2021-05-06 02:13:37,978 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 37 [2021-05-06 02:13:37,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:13:37,978 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2021-05-06 02:13:37,979 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 02:13:37,979 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2021-05-06 02:13:37,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-06 02:13:37,980 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:13:37,980 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] [2021-05-06 02:13:38,190 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:13:38,190 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:13:38,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:13:38,191 INFO L82 PathProgramCache]: Analyzing trace with hash 866494938, now seen corresponding path program 1 times [2021-05-06 02:13:38,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:13:38,191 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916572869] [2021-05-06 02:13:38,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:13:38,221 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:13:38,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [88622275] [2021-05-06 02:13:38,221 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