/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/prodbin-ll_valuebound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 04:32:45,375 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 04:32:45,377 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 04:32:45,409 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 04:32:45,431 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 04:32:45,433 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 04:32:45,435 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 04:32:45,436 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 04:32:45,439 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 04:32:45,439 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 04:32:45,442 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 04:32:45,446 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 04:32:45,447 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 04:32:45,450 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 04:32:45,451 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 04:32:45,451 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 04:32:45,453 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 04:32:45,459 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 04:32:45,460 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 04:32:45,462 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 04:32:45,463 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 04:32:45,496 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 04:32:45,496 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 04:32:45,497 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 04:32:45,497 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 04:32:45,497 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 04:32:45,498 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 04:32:45,498 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 04:32:45,498 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 04:32:45,498 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 04:32:45,498 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 04:32:45,498 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 04:32:45,498 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 04:32:45,499 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 04:32:45,499 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 04:32:45,499 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 04:32:45,499 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 04:32:45,499 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 04:32:45,499 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 04:32:45,499 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 04:32:45,500 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 04:32:45,500 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 04:32:45,500 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 04:32:45,500 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 04:32:45,500 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 04:32:45,500 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 04:32:45,500 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 04:32:45,501 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 04:32:45,501 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 04:32:45,501 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 04:32:45,774 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 04:32:45,799 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 04:32:45,801 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 04:32:45,802 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 04:32:45,803 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 04:32:45,804 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_valuebound5.c [2021-05-06 04:32:45,860 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4794b9aad/278fc2a26d1644f88623d30f0a5370b3/FLAGf15e32dcc [2021-05-06 04:32:46,254 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 04:32:46,256 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_valuebound5.c [2021-05-06 04:32:46,262 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4794b9aad/278fc2a26d1644f88623d30f0a5370b3/FLAGf15e32dcc [2021-05-06 04:32:46,284 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4794b9aad/278fc2a26d1644f88623d30f0a5370b3 [2021-05-06 04:32:46,287 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 04:32:46,289 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 04:32:46,291 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 04:32:46,291 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 04:32:46,294 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 04:32:46,295 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 04:32:46" (1/1) ... [2021-05-06 04:32:46,295 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36c0bf95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:32:46, skipping insertion in model container [2021-05-06 04:32:46,296 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 04:32:46" (1/1) ... [2021-05-06 04:32:46,302 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 04:32:46,322 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 04:32:46,414 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/prodbin-ll_valuebound5.c[537,550] [2021-05-06 04:32:46,425 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 04:32:46,431 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 04:32:46,457 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/prodbin-ll_valuebound5.c[537,550] [2021-05-06 04:32:46,462 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 04:32:46,494 INFO L208 MainTranslator]: Completed translation [2021-05-06 04:32:46,497 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:32:46 WrapperNode [2021-05-06 04:32:46,497 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 04:32:46,498 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 04:32:46,498 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 04:32:46,500 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 04:32:46,508 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:32:46" (1/1) ... [2021-05-06 04:32:46,509 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:32:46" (1/1) ... [2021-05-06 04:32:46,516 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:32:46" (1/1) ... [2021-05-06 04:32:46,516 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:32:46" (1/1) ... [2021-05-06 04:32:46,530 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:32:46" (1/1) ... [2021-05-06 04:32:46,534 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:32:46" (1/1) ... [2021-05-06 04:32:46,535 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:32:46" (1/1) ... [2021-05-06 04:32:46,536 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 04:32:46,537 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 04:32:46,537 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 04:32:46,537 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 04:32:46,538 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:32:46" (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 04:32:46,609 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 04:32:46,610 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 04:32:46,610 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 04:32:46,610 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 04:32:46,610 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 04:32:46,610 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 04:32:46,611 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 04:32:46,611 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 04:32:46,611 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 04:32:46,611 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 04:32:46,611 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 04:32:46,611 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 04:32:46,612 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 04:32:46,612 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 04:32:46,613 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 04:32:46,613 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 04:32:46,613 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 04:32:46,613 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 04:32:46,613 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 04:32:46,613 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 04:32:46,900 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 04:32:46,900 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 04:32:46,901 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 04:32:46 BoogieIcfgContainer [2021-05-06 04:32:46,902 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 04:32:46,903 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 04:32:46,903 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 04:32:46,905 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 04:32:46,905 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 04:32:46" (1/3) ... [2021-05-06 04:32:46,906 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@785cb151 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 04:32:46, skipping insertion in model container [2021-05-06 04:32:46,906 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:32:46" (2/3) ... [2021-05-06 04:32:46,906 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@785cb151 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 04:32:46, skipping insertion in model container [2021-05-06 04:32:46,906 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 04:32:46" (3/3) ... [2021-05-06 04:32:46,907 INFO L111 eAbstractionObserver]: Analyzing ICFG prodbin-ll_valuebound5.c [2021-05-06 04:32:46,911 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 04:32:46,914 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 04:32:46,927 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 04:32:46,946 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 04:32:46,946 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 04:32:46,946 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 04:32:46,946 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 04:32:46,946 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 04:32:46,946 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 04:32:46,947 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 04:32:46,947 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 04:32:46,967 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 04:32:46,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 04:32:46,972 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:32:46,972 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 04:32:46,973 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:32:46,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:32:46,981 INFO L82 PathProgramCache]: Analyzing trace with hash -589322634, now seen corresponding path program 1 times [2021-05-06 04:32:46,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:32:46,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095986109] [2021-05-06 04:32:46,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:32:47,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:32:47,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 04:32:47,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:32:47,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 04:32:47,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:32:47,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 04:32:47,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:32:47,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 04:32:47,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:32:47,291 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 04:32:47,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:32:47,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095986109] [2021-05-06 04:32:47,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095986109] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 04:32:47,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 04:32:47,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 04:32:47,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500136261] [2021-05-06 04:32:47,297 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 04:32:47,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:32:47,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 04:32:47,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 04:32:47,318 INFO L87 Difference]: Start difference. First operand has 32 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) 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 04:32:47,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:32:47,409 INFO L93 Difference]: Finished difference Result 57 states and 77 transitions. [2021-05-06 04:32:47,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 04:32:47,411 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 04:32:47,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:32:47,417 INFO L225 Difference]: With dead ends: 57 [2021-05-06 04:32:47,417 INFO L226 Difference]: Without dead ends: 27 [2021-05-06 04:32:47,420 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 68.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 04:32:47,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-06 04:32:47,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-06 04:32:47,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 04:32:47,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-05-06 04:32:47,451 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 28 [2021-05-06 04:32:47,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:32:47,451 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-05-06 04:32:47,451 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 04:32:47,451 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-05-06 04:32:47,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 04:32:47,453 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:32:47,453 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 04:32:47,453 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 04:32:47,453 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:32:47,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:32:47,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1736242504, now seen corresponding path program 1 times [2021-05-06 04:32:47,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:32:47,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401367398] [2021-05-06 04:32:47,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:32:47,470 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:32:47,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [29186260] [2021-05-06 04:32:47,471 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 04:32:47,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:32:47,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 04:32:47,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:32:47,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:32:47,676 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 04:32:47,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:32:47,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401367398] [2021-05-06 04:32:47,677 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:32:47,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29186260] [2021-05-06 04:32:47,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29186260] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 04:32:47,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 04:32:47,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 04:32:47,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78319892] [2021-05-06 04:32:47,679 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 04:32:47,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:32:47,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 04:32:47,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 04:32:47,680 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 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 04:32:47,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:32:47,730 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2021-05-06 04:32:47,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 04:32:47,731 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 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 04:32:47,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:32:47,732 INFO L225 Difference]: With dead ends: 39 [2021-05-06 04:32:47,732 INFO L226 Difference]: Without dead ends: 37 [2021-05-06 04:32:47,733 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.0ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 04:32:47,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-05-06 04:32:47,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2021-05-06 04:32:47,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 20 states have (on average 1.15) internal successors, (23), 22 states have internal predecessors, (23), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 04:32:47,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2021-05-06 04:32:47,742 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 28 [2021-05-06 04:32:47,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:32:47,743 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2021-05-06 04:32:47,743 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 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 04:32:47,743 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2021-05-06 04:32:47,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-06 04:32:47,744 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:32:47,744 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, 1] [2021-05-06 04:32:47,964 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 04:32:47,965 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:32:47,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:32:47,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1911690432, now seen corresponding path program 1 times [2021-05-06 04:32:47,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:32:47,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773726908] [2021-05-06 04:32:47,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:32:47,991 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:32:47,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1573814824] [2021-05-06 04:32:47,992 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 04:32:48,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:32:48,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 04:32:48,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:32:48,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:32:48,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:32:48,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:32:48,213 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-06 04:32:48,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:32:48,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773726908] [2021-05-06 04:32:48,214 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:32:48,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573814824] [2021-05-06 04:32:48,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573814824] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 04:32:48,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 04:32:48,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 04:32:48,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780649340] [2021-05-06 04:32:48,224 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 04:32:48,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:32:48,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 04:32:48,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 04:32:48,226 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 04:32:48,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:32:48,350 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2021-05-06 04:32:48,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 04:32:48,350 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2021-05-06 04:32:48,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:32:48,351 INFO L225 Difference]: With dead ends: 43 [2021-05-06 04:32:48,351 INFO L226 Difference]: Without dead ends: 36 [2021-05-06 04:32:48,352 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 46.0ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-06 04:32:48,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-06 04:32:48,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2021-05-06 04:32:48,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 04:32:48,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2021-05-06 04:32:48,359 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 34 [2021-05-06 04:32:48,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:32:48,359 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2021-05-06 04:32:48,360 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 04:32:48,360 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2021-05-06 04:32:48,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-06 04:32:48,361 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:32:48,361 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-05-06 04:32:48,581 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:32:48,581 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:32:48,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:32:48,581 INFO L82 PathProgramCache]: Analyzing trace with hash 2022075506, now seen corresponding path program 1 times [2021-05-06 04:32:48,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:32:48,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485795617] [2021-05-06 04:32:48,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:32:48,602 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:32:48,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1364080599] [2021-05-06 04:32:48,603 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 04:32:48,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:32:48,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-06 04:32:48,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:32:48,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:32:48,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:32:48,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:32:48,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:32:49,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:32:49,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:32:49,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:32:49,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:32:49,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:32:49,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:32:49,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:32:49,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:32:49,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:32:49,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:32:49,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:32:49,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:32:49,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:32:49,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:32:49,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:32:49,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:32:49,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:32:49,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:32:49,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:32:49,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:32:49,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:32:49,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:32:49,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:32:49,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:32:49,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:32:49,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:32:49,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:32:49,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:32:49,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:32:49,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:32:49,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:32:49,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:32:49,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:32:49,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:32:49,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:32:49,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:32:49,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:32:49,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:32:49,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:32:49,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:32:49,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:32:49,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:32:49,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:32:49,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:32:49,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:32:49,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:32:49,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:32:49,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:32:49,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:32:49,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:32:49,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:32:49,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:32:49,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:32:49,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:32:49,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:32:49,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:32:49,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:32:49,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:32:49,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:32:49,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:32:49,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:32:49,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:32:49,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:32:49,400 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-06 04:32:49,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:32:49,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485795617] [2021-05-06 04:32:49,400 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:32:49,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364080599] [2021-05-06 04:32:49,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364080599] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:32:49,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:32:49,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 04:32:49,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484656622] [2021-05-06 04:32:49,403 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 04:32:49,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:32:49,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 04:32:49,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-05-06 04:32:49,405 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 11 states have internal predecessors, (22), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 04:32:49,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:32:49,675 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2021-05-06 04:32:49,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 04:32:49,681 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 11 states have internal predecessors, (22), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 37 [2021-05-06 04:32:49,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:32:49,686 INFO L225 Difference]: With dead ends: 49 [2021-05-06 04:32:49,686 INFO L226 Difference]: Without dead ends: 47 [2021-05-06 04:32:49,687 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 198.8ms TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-05-06 04:32:49,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-06 04:32:49,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 42. [2021-05-06 04:32:49,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 29 states have internal predecessors, (31), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 04:32:49,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2021-05-06 04:32:49,710 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 37 [2021-05-06 04:32:49,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:32:49,711 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2021-05-06 04:32:49,711 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 11 states have internal predecessors, (22), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-06 04:32:49,711 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2021-05-06 04:32:49,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-06 04:32:49,714 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:32:49,715 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-05-06 04:32:49,929 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:32:49,929 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:32:49,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:32:49,929 INFO L82 PathProgramCache]: Analyzing trace with hash -497884428, now seen corresponding path program 1 times [2021-05-06 04:32:49,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:32:49,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118395913] [2021-05-06 04:32:49,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:32:49,942 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:32:49,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1709463964] [2021-05-06 04:32:49,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:32:50,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:32:50,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-06 04:32:50,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:32:50,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:32:50,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:32:50,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:32:50,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:32:50,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:32:50,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:32:50,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:32:50,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:32:50,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:32:50,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:32:50,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:32:50,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:32:50,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:32:50,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:32:50,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:32:50,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:32:50,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:32:50,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:32:50,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:32:50,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:32:50,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:32:50,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:32:50,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:32:50,303 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-06 04:32:50,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:32:50,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118395913] [2021-05-06 04:32:50,303 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:32:50,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709463964] [2021-05-06 04:32:50,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709463964] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:32:50,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:32:50,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 04:32:50,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929901858] [2021-05-06 04:32:50,304 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 04:32:50,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:32:50,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 04:32:50,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-06 04:32:50,305 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 04:32:50,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:32:50,441 INFO L93 Difference]: Finished difference Result 59 states and 66 transitions. [2021-05-06 04:32:50,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 04:32:50,441 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 37 [2021-05-06 04:32:50,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:32:50,445 INFO L225 Difference]: With dead ends: 59 [2021-05-06 04:32:50,445 INFO L226 Difference]: Without dead ends: 52 [2021-05-06 04:32:50,447 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 90.2ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-06 04:32:50,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-06 04:32:50,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2021-05-06 04:32:50,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 33 states have (on average 1.121212121212121) internal successors, (37), 35 states have internal predecessors, (37), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 04:32:50,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions. [2021-05-06 04:32:50,461 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 37 [2021-05-06 04:32:50,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:32:50,462 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions. [2021-05-06 04:32:50,462 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 04:32:50,462 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions. [2021-05-06 04:32:50,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-06 04:32:50,464 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:32:50,464 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:32:50,692 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:32:50,693 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:32:50,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:32:50,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1351630086, now seen corresponding path program 1 times [2021-05-06 04:32:50,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:32:50,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931339784] [2021-05-06 04:32:50,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:32:50,704 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:32:50,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [294513295] [2021-05-06 04:32:50,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:32:50,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:32:50,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-06 04:32:50,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:32:50,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:32:50,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:32:50,883 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-06 04:32:50,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:32:50,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931339784] [2021-05-06 04:32:50,884 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:32:50,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294513295] [2021-05-06 04:32:50,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294513295] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:32:50,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:32:50,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 04:32:50,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766651929] [2021-05-06 04:32:50,885 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 04:32:50,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:32:50,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 04:32:50,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 04:32:50,885 INFO L87 Difference]: Start difference. First operand 50 states and 55 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6)