/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_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 03:29:48,045 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 03:29:48,050 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 03:29:48,075 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 03:29:48,083 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 03:29:48,084 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 03:29:48,085 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 03:29:48,086 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 03:29:48,087 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 03:29:48,088 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 03:29:48,089 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 03:29:48,091 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 03:29:48,092 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 03:29:48,100 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 03:29:48,101 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 03:29:48,102 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 03:29:48,104 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 03:29:48,111 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 03:29:48,111 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 03:29:48,112 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 03:29:48,129 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 03:29:48,167 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 03:29:48,168 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 03:29:48,169 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 03:29:48,169 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 03:29:48,169 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 03:29:48,169 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 03:29:48,170 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 03:29:48,170 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 03:29:48,170 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 03:29:48,170 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 03:29:48,170 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 03:29:48,170 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 03:29:48,170 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 03:29:48,171 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 03:29:48,171 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 03:29:48,171 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 03:29:48,171 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 03:29:48,171 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 03:29:48,171 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 03:29:48,172 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 03:29:48,172 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 03:29:48,172 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 03:29:48,172 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 03:29:48,172 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 03:29:48,172 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 03:29:48,173 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 03:29:48,173 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 03:29:48,173 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 03:29:48,173 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 03:29:48,434 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 03:29:48,461 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 03:29:48,463 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 03:29:48,464 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 03:29:48,465 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 03:29:48,465 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound50.c [2021-05-06 03:29:48,522 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba86bd692/7badefe1bb60425885705c1ac3e86a58/FLAG02b0e96c7 [2021-05-06 03:29:48,998 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 03:29:48,999 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound50.c [2021-05-06 03:29:49,006 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba86bd692/7badefe1bb60425885705c1ac3e86a58/FLAG02b0e96c7 [2021-05-06 03:29:49,030 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba86bd692/7badefe1bb60425885705c1ac3e86a58 [2021-05-06 03:29:49,035 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 03:29:49,038 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 03:29:49,041 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 03:29:49,041 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 03:29:49,044 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 03:29:49,045 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 03:29:49" (1/1) ... [2021-05-06 03:29:49,047 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c0a08da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:29:49, skipping insertion in model container [2021-05-06 03:29:49,047 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 03:29:49" (1/1) ... [2021-05-06 03:29:49,053 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 03:29:49,079 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 03:29:49,207 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_valuebound50.c[545,558] [2021-05-06 03:29:49,234 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 03:29:49,247 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 03:29:49,263 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_valuebound50.c[545,558] [2021-05-06 03:29:49,286 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 03:29:49,300 INFO L208 MainTranslator]: Completed translation [2021-05-06 03:29:49,302 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:29:49 WrapperNode [2021-05-06 03:29:49,302 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 03:29:49,303 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 03:29:49,303 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 03:29:49,305 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 03:29:49,338 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:29:49" (1/1) ... [2021-05-06 03:29:49,339 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:29:49" (1/1) ... [2021-05-06 03:29:49,358 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:29:49" (1/1) ... [2021-05-06 03:29:49,359 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:29:49" (1/1) ... [2021-05-06 03:29:49,364 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:29:49" (1/1) ... [2021-05-06 03:29:49,379 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:29:49" (1/1) ... [2021-05-06 03:29:49,380 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:29:49" (1/1) ... [2021-05-06 03:29:49,382 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 03:29:49,383 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 03:29:49,383 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 03:29:49,383 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 03:29:49,384 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:29:49" (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 03:29:49,460 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 03:29:49,461 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 03:29:49,461 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 03:29:49,461 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 03:29:49,461 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 03:29:49,462 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 03:29:49,462 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 03:29:49,462 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 03:29:49,462 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 03:29:49,462 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 03:29:49,463 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-06 03:29:49,463 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 03:29:49,463 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 03:29:49,463 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 03:29:49,464 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 03:29:49,464 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 03:29:49,464 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 03:29:49,464 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 03:29:49,464 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 03:29:49,464 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 03:29:49,822 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 03:29:49,822 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 03:29:49,823 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 03:29:49 BoogieIcfgContainer [2021-05-06 03:29:49,824 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 03:29:49,825 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 03:29:49,825 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 03:29:49,828 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 03:29:49,828 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 03:29:49" (1/3) ... [2021-05-06 03:29:49,831 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@660bf9a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 03:29:49, skipping insertion in model container [2021-05-06 03:29:49,831 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:29:49" (2/3) ... [2021-05-06 03:29:49,832 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@660bf9a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 03:29:49, skipping insertion in model container [2021-05-06 03:29:49,832 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 03:29:49" (3/3) ... [2021-05-06 03:29:49,833 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-u_valuebound50.c [2021-05-06 03:29:49,839 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 03:29:49,843 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 03:29:49,859 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 03:29:49,889 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 03:29:49,889 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 03:29:49,889 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 03:29:49,890 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 03:29:49,890 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 03:29:49,890 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 03:29:49,890 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 03:29:49,890 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 03:29:49,909 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 03:29:49,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 03:29:49,915 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:29:49,915 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 03:29:49,916 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:29:49,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:29:49,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1784424332, now seen corresponding path program 1 times [2021-05-06 03:29:49,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:29:49,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407392983] [2021-05-06 03:29:49,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:29:50,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:29:50,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 03:29:50,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:29:50,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 03:29:50,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:29:50,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 03:29:50,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:29:50,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 03:29:50,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:29:50,231 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 03:29:50,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:29:50,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407392983] [2021-05-06 03:29:50,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407392983] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:29:50,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:29:50,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 03:29:50,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842466555] [2021-05-06 03:29:50,237 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 03:29:50,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:29:50,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 03:29:50,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 03:29:50,251 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 03:29:50,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:29:50,405 INFO L93 Difference]: Finished difference Result 69 states and 110 transitions. [2021-05-06 03:29:50,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 03:29:50,407 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 03:29:50,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:29:50,413 INFO L225 Difference]: With dead ends: 69 [2021-05-06 03:29:50,414 INFO L226 Difference]: Without dead ends: 33 [2021-05-06 03:29:50,417 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 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 03:29:50,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-06 03:29:50,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-06 03:29:50,453 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 03:29:50,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2021-05-06 03:29:50,456 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 28 [2021-05-06 03:29:50,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:29:50,456 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2021-05-06 03:29:50,457 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 03:29:50,457 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2021-05-06 03:29:50,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 03:29:50,458 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:29:50,458 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 03:29:50,459 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 03:29:50,459 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:29:50,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:29:50,459 INFO L82 PathProgramCache]: Analyzing trace with hash 1361835634, now seen corresponding path program 1 times [2021-05-06 03:29:50,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:29:50,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128385946] [2021-05-06 03:29:50,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:29:50,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:29:50,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 03:29:50,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:29:50,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 03:29:50,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:29:50,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 03:29:50,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:29:50,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 03:29:50,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:29:50,604 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 03:29:50,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:29:50,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128385946] [2021-05-06 03:29:50,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128385946] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:29:50,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:29:50,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 03:29:50,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466809758] [2021-05-06 03:29:50,606 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 03:29:50,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:29:50,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 03:29:50,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:29:50,607 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 03:29:51,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:29:51,055 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2021-05-06 03:29:51,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 03:29:51,056 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 03:29:51,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:29:51,059 INFO L225 Difference]: With dead ends: 46 [2021-05-06 03:29:51,059 INFO L226 Difference]: Without dead ends: 44 [2021-05-06 03:29:51,061 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 194.7ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 03:29:51,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-06 03:29:51,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2021-05-06 03:29:51,089 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 03:29:51,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2021-05-06 03:29:51,092 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 28 [2021-05-06 03:29:51,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:29:51,094 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2021-05-06 03:29:51,094 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 03:29:51,094 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2021-05-06 03:29:51,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 03:29:51,095 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:29:51,095 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 03:29:51,095 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 03:29:51,095 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:29:51,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:29:51,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1382067636, now seen corresponding path program 1 times [2021-05-06 03:29:51,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:29:51,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883969229] [2021-05-06 03:29:51,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:29:51,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:29:51,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 03:29:51,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:29:51,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 03:29:51,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:29:51,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 03:29:51,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:29:51,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 03:29:51,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:29:51,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-05-06 03:29:51,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:29:51,373 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 03:29:51,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:29:51,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883969229] [2021-05-06 03:29:51,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883969229] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:29:51,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:29:51,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 03:29:51,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015023760] [2021-05-06 03:29:51,375 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 03:29:51,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:29:51,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 03:29:51,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:29:51,376 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 03:29:51,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:29:51,733 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2021-05-06 03:29:51,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 03:29:51,734 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 03:29:51,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:29:51,735 INFO L225 Difference]: With dead ends: 50 [2021-05-06 03:29:51,735 INFO L226 Difference]: Without dead ends: 48 [2021-05-06 03:29:51,736 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 192.9ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 03:29:51,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-06 03:29:51,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2021-05-06 03:29:51,753 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 03:29:51,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2021-05-06 03:29:51,759 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 33 [2021-05-06 03:29:51,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:29:51,759 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2021-05-06 03:29:51,759 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 03:29:51,759 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2021-05-06 03:29:51,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-06 03:29:51,761 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:29:51,761 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 03:29:51,761 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-06 03:29:51,762 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:29:51,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:29:51,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1455208590, now seen corresponding path program 1 times [2021-05-06 03:29:51,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:29:51,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561378229] [2021-05-06 03:29:51,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:29:51,789 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:29:51,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1800792605] [2021-05-06 03:29:51,790 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 03:29:51,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:29:51,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 03:29:51,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:29:52,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:29:52,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:29:52,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:29:52,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:29:52,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:29:52,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:29:52,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:29:52,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:29:52,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:29:52,177 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 03:29:52,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:29:52,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561378229] [2021-05-06 03:29:52,178 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:29:52,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800792605] [2021-05-06 03:29:52,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800792605] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:29:52,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:29:52,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 03:29:52,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255283632] [2021-05-06 03:29:52,179 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 03:29:52,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:29:52,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 03:29:52,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 03:29:52,180 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 03:29:54,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:29:54,575 INFO L93 Difference]: Finished difference Result 64 states and 83 transitions. [2021-05-06 03:29:54,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 03:29:54,576 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 03:29:54,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:29:54,577 INFO L225 Difference]: With dead ends: 64 [2021-05-06 03:29:54,577 INFO L226 Difference]: Without dead ends: 61 [2021-05-06 03:29:54,578 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 58.5ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-06 03:29:54,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-05-06 03:29:54,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 55. [2021-05-06 03:29:54,588 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 03:29:54,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 69 transitions. [2021-05-06 03:29:54,589 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 69 transitions. Word has length 38 [2021-05-06 03:29:54,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:29:54,589 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 69 transitions. [2021-05-06 03:29:54,590 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 03:29:54,590 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 69 transitions. [2021-05-06 03:29:54,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-06 03:29:54,591 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:29:54,591 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 03:29:54,817 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:29:54,817 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:29:54,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:29:54,818 INFO L82 PathProgramCache]: Analyzing trace with hash -1688067263, now seen corresponding path program 1 times [2021-05-06 03:29:54,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:29:54,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400547655] [2021-05-06 03:29:54,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:29:54,826 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:29:54,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1575869735] [2021-05-06 03:29:54,827 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 03:29:54,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:29:54,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 03:29:54,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:29:54,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:29:54,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:29:55,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:29:55,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:29:55,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:29:55,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:29:55,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:29:55,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:29:55,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:29:55,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:29:55,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:29:55,207 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 03:29:55,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:29:55,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400547655] [2021-05-06 03:29:55,208 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:29:55,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575869735] [2021-05-06 03:29:55,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575869735] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:29:55,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:29:55,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 03:29:55,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967358921] [2021-05-06 03:29:55,209 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 03:29:55,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:29:55,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 03:29:55,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 03:29:55,210 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 03:29:55,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:29:55,595 INFO L93 Difference]: Finished difference Result 76 states and 92 transitions. [2021-05-06 03:29:55,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 03:29:55,596 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 03:29:55,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:29:55,598 INFO L225 Difference]: With dead ends: 76 [2021-05-06 03:29:55,598 INFO L226 Difference]: Without dead ends: 73 [2021-05-06 03:29:55,598 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 123.9ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-06 03:29:55,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-05-06 03:29:55,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2021-05-06 03:29:55,612 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 03:29:55,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 87 transitions. [2021-05-06 03:29:55,613 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 87 transitions. Word has length 45 [2021-05-06 03:29:55,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:29:55,614 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 87 transitions. [2021-05-06 03:29:55,614 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 03:29:55,614 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 87 transitions. [2021-05-06 03:29:55,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-06 03:29:55,621 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:29:55,621 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 03:29:55,824 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:29:55,825 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:29:55,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:29:55,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1471734606, now seen corresponding path program 1 times [2021-05-06 03:29:55,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:29:55,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983467568] [2021-05-06 03:29:55,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:29:55,833 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:29:55,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [6560148] [2021-05-06 03:29:55,833 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 03:29:55,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:29:55,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-06 03:29:55,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:29:56,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:29:56,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:29:56,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:29:56,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:29:56,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:29:56,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:29:56,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:29:56,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:29:56,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:29:56,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:29:56,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:29:56,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:29:56,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:29:56,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:29:56,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:29:56,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:29:56,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:29:56,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:29:56,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:29:56,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:29:56,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:29:56,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:29:56,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:29:56,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:29:56,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:29:56,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:29:56,533 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 15 proven. 11 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-06 03:29:56,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:29:56,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983467568] [2021-05-06 03:29:56,534 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:29:56,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6560148] [2021-05-06 03:29:56,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6560148] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:29:56,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:29:56,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 03:29:56,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647765721] [2021-05-06 03:29:56,535 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 03:29:56,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:29:56,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 03:29:56,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-05-06 03:29:56,536 INFO L87 Difference]: Start difference. First operand 72 states and 87 transitions. Second operand has 13 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 10 states have internal predecessors, (20), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-06 03:30:01,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:30:01,717 INFO L93 Difference]: Finished difference Result 99 states and 125 transitions. [2021-05-06 03:30:01,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 03:30:01,718 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 10 states have internal predecessors, (20), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) Word has length 55 [2021-05-06 03:30:01,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:30:01,720 INFO L225 Difference]: With dead ends: 99 [2021-05-06 03:30:01,720 INFO L226 Difference]: Without dead ends: 91 [2021-05-06 03:30:01,721 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 350.8ms TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-05-06 03:30:01,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-05-06 03:30:01,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 85. [2021-05-06 03:30:01,734 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 03:30:01,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 105 transitions. [2021-05-06 03:30:01,735 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 105 transitions. Word has length 55 [2021-05-06 03:30:01,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:30:01,735 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 105 transitions. [2021-05-06 03:30:01,735 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 10 states have internal predecessors, (20), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-06 03:30:01,736 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 105 transitions. [2021-05-06 03:30:01,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-06 03:30:01,736 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:30:01,737 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 03:30:01,942 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:30:01,943 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:30:01,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:30:01,943 INFO L82 PathProgramCache]: Analyzing trace with hash 1586192473, now seen corresponding path program 1 times [2021-05-06 03:30:01,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:30:01,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462765429] [2021-05-06 03:30:01,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:30:01,975 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:30:01,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2099169297] [2021-05-06 03:30:01,976 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