/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/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/geo2-ll_unwindbound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 08:28:41,859 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 08:28:41,862 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 08:28:41,891 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 08:28:41,907 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 08:28:41,908 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 08:28:41,909 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 08:28:41,910 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 08:28:41,912 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 08:28:41,912 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 08:28:41,914 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 08:28:41,918 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 08:28:41,919 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 08:28:41,920 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 08:28:41,921 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 08:28:41,922 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 08:28:41,926 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 08:28:41,932 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 08:28:41,933 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 08:28:41,933 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 08:28:41,934 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 08:28:41,947 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 08:28:41,947 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 08:28:41,949 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 08:28:41,949 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 08:28:41,949 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 08:28:41,949 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 08:28:41,949 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 08:28:41,950 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 08:28:41,950 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 08:28:41,950 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 08:28:41,950 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 08:28:41,951 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 08:28:41,951 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 08:28:41,951 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 08:28:41,951 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 08:28:41,951 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 08:28:41,951 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 08:28:41,951 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 08:28:41,951 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 08:28:41,951 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 08:28:41,951 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 08:28:41,952 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 08:28:41,952 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 08:28:42,187 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 08:28:42,212 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 08:28:42,214 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 08:28:42,215 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 08:28:42,215 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 08:28:42,216 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/geo2-ll_unwindbound2.c [2021-05-06 08:28:42,259 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f1b20d8b/c8845593bcf94871a0ce490b652f5bde/FLAG3ed5fb695 [2021-05-06 08:28:42,559 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 08:28:42,559 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/geo2-ll_unwindbound2.c [2021-05-06 08:28:42,563 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f1b20d8b/c8845593bcf94871a0ce490b652f5bde/FLAG3ed5fb695 [2021-05-06 08:28:43,005 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f1b20d8b/c8845593bcf94871a0ce490b652f5bde [2021-05-06 08:28:43,007 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 08:28:43,008 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 08:28:43,011 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 08:28:43,011 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 08:28:43,014 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 08:28:43,014 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:28:43" (1/1) ... [2021-05-06 08:28:43,015 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a32beaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:28:43, skipping insertion in model container [2021-05-06 08:28:43,015 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:28:43" (1/1) ... [2021-05-06 08:28:43,019 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 08:28:43,028 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 08:28:43,113 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/geo2-ll_unwindbound2.c[525,538] [2021-05-06 08:28:43,121 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:28:43,127 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 08:28:43,135 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/geo2-ll_unwindbound2.c[525,538] [2021-05-06 08:28:43,145 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:28:43,159 INFO L208 MainTranslator]: Completed translation [2021-05-06 08:28:43,159 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:28:43 WrapperNode [2021-05-06 08:28:43,159 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 08:28:43,162 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 08:28:43,162 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 08:28:43,162 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 08:28:43,170 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:28:43" (1/1) ... [2021-05-06 08:28:43,170 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:28:43" (1/1) ... [2021-05-06 08:28:43,175 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:28:43" (1/1) ... [2021-05-06 08:28:43,175 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:28:43" (1/1) ... [2021-05-06 08:28:43,188 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:28:43" (1/1) ... [2021-05-06 08:28:43,203 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:28:43" (1/1) ... [2021-05-06 08:28:43,207 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:28:43" (1/1) ... [2021-05-06 08:28:43,208 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 08:28:43,209 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 08:28:43,210 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 08:28:43,210 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 08:28:43,210 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:28:43" (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 08:28:43,277 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 08:28:43,277 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 08:28:43,277 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 08:28:43,277 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 08:28:43,277 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 08:28:43,278 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 08:28:43,278 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 08:28:43,278 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 08:28:43,278 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 08:28:43,278 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 08:28:43,278 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 08:28:43,278 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 08:28:43,279 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 08:28:43,279 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 08:28:43,279 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 08:28:43,279 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 08:28:43,279 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 08:28:43,279 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 08:28:43,280 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 08:28:43,280 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 08:28:43,463 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 08:28:43,464 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 08:28:43,464 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:28:43 BoogieIcfgContainer [2021-05-06 08:28:43,465 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 08:28:43,465 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 08:28:43,465 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 08:28:43,466 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 08:28:43,467 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:28:43" (1/1) ... [2021-05-06 08:28:43,477 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:28:43 BasicIcfg [2021-05-06 08:28:43,477 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 08:28:43,478 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 08:28:43,478 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 08:28:43,480 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 08:28:43,480 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 08:28:43" (1/4) ... [2021-05-06 08:28:43,480 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@633a4959 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:28:43, skipping insertion in model container [2021-05-06 08:28:43,480 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:28:43" (2/4) ... [2021-05-06 08:28:43,480 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@633a4959 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:28:43, skipping insertion in model container [2021-05-06 08:28:43,481 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:28:43" (3/4) ... [2021-05-06 08:28:43,481 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@633a4959 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 08:28:43, skipping insertion in model container [2021-05-06 08:28:43,481 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:28:43" (4/4) ... [2021-05-06 08:28:43,482 INFO L111 eAbstractionObserver]: Analyzing ICFG geo2-ll_unwindbound2.cJordan [2021-05-06 08:28:43,485 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 08:28:43,487 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 08:28:43,498 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 08:28:43,513 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 08:28:43,513 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 08:28:43,513 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 08:28:43,513 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 08:28:43,513 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 08:28:43,513 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 08:28:43,513 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 08:28:43,513 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 08:28:43,530 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 08:28:43,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-06 08:28:43,534 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:28:43,535 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:28:43,535 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:28:43,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:28:43,538 INFO L82 PathProgramCache]: Analyzing trace with hash -630084848, now seen corresponding path program 1 times [2021-05-06 08:28:43,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:28:43,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191689920] [2021-05-06 08:28:43,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:28:43,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:28:43,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 08:28:43,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:28:43,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 08:28:43,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:28:43,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191689920] [2021-05-06 08:28:43,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191689920] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:28:43,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:28:43,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 08:28:43,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765328065] [2021-05-06 08:28:43,692 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 08:28:43,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:28:43,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 08:28:43,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 08:28:43,702 INFO L87 Difference]: Start difference. First operand has 22 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 08:28:43,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:28:43,739 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2021-05-06 08:28:43,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 08:28:43,740 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-06 08:28:43,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:28:43,745 INFO L225 Difference]: With dead ends: 23 [2021-05-06 08:28:43,745 INFO L226 Difference]: Without dead ends: 18 [2021-05-06 08:28:43,746 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 08:28:43,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-05-06 08:28:43,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2021-05-06 08:28:43,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 08:28:43,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-05-06 08:28:43,766 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2021-05-06 08:28:43,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:28:43,767 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-05-06 08:28:43,767 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 08:28:43,767 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-05-06 08:28:43,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 08:28:43,767 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:28:43,767 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:28:43,768 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 08:28:43,768 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:28:43,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:28:43,768 INFO L82 PathProgramCache]: Analyzing trace with hash 1971636769, now seen corresponding path program 1 times [2021-05-06 08:28:43,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:28:43,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190464328] [2021-05-06 08:28:43,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:28:43,783 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:28:43,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1112457468] [2021-05-06 08:28:43,783 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 08:28:43,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:28:43,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 08:28:43,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:28:43,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:43,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:43,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:43,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:43,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:43,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 08:28:43,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:28:43,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190464328] [2021-05-06 08:28:43,947 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:28:43,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112457468] [2021-05-06 08:28:43,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112457468] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:28:43,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:28:43,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 08:28:43,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320493353] [2021-05-06 08:28:43,949 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 08:28:43,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:28:43,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 08:28:43,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 08:28:43,954 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 08:28:43,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:28:43,966 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2021-05-06 08:28:43,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 08:28:43,967 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-06 08:28:43,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:28:43,967 INFO L225 Difference]: With dead ends: 19 [2021-05-06 08:28:43,967 INFO L226 Difference]: Without dead ends: 19 [2021-05-06 08:28:43,968 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.7ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 08:28:43,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-05-06 08:28:43,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-05-06 08:28:43,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 08:28:43,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-05-06 08:28:43,970 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 12 [2021-05-06 08:28:43,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:28:43,971 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-05-06 08:28:43,971 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 08:28:43,971 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-05-06 08:28:43,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 08:28:43,971 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:28:43,971 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:28:44,188 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 08:28:44,188 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:28:44,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:28:44,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1972709245, now seen corresponding path program 1 times [2021-05-06 08:28:44,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:28:44,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267650977] [2021-05-06 08:28:44,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:28:44,198 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:28:44,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1634084173] [2021-05-06 08:28:44,198 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 08:28:44,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:28:44,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:28:44,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:28:44,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:44,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 08:28:44,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:28:44,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267650977] [2021-05-06 08:28:44,334 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:28:44,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634084173] [2021-05-06 08:28:44,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634084173] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:28:44,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:28:44,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 08:28:44,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717237514] [2021-05-06 08:28:44,335 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:28:44,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:28:44,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:28:44,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:28:44,336 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 08:28:44,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:28:44,374 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2021-05-06 08:28:44,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 08:28:44,374 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-06 08:28:44,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:28:44,376 INFO L225 Difference]: With dead ends: 26 [2021-05-06 08:28:44,376 INFO L226 Difference]: Without dead ends: 25 [2021-05-06 08:28:44,377 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.4ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:28:44,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-06 08:28:44,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-05-06 08:28:44,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 08:28:44,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2021-05-06 08:28:44,380 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 12 [2021-05-06 08:28:44,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:28:44,380 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2021-05-06 08:28:44,380 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 08:28:44,380 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2021-05-06 08:28:44,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-06 08:28:44,381 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:28:44,381 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:28:44,600 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:28:44,600 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:28:44,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:28:44,601 INFO L82 PathProgramCache]: Analyzing trace with hash -832305310, now seen corresponding path program 1 times [2021-05-06 08:28:44,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:28:44,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415287115] [2021-05-06 08:28:44,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:28:44,608 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:28:44,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [737684653] [2021-05-06 08:28:44,608 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 08:28:44,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:28:44,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:28:44,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:28:44,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:44,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:44,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:44,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:44,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:44,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:44,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:44,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:44,734 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 08:28:44,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:28:44,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415287115] [2021-05-06 08:28:44,735 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:28:44,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737684653] [2021-05-06 08:28:44,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737684653] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:28:44,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:28:44,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-06 08:28:44,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709182540] [2021-05-06 08:28:44,735 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 08:28:44,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:28:44,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 08:28:44,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 08:28:44,736 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 08:28:44,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:28:44,754 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2021-05-06 08:28:44,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:28:44,754 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-06 08:28:44,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:28:44,755 INFO L225 Difference]: With dead ends: 27 [2021-05-06 08:28:44,755 INFO L226 Difference]: Without dead ends: 27 [2021-05-06 08:28:44,755 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 10.6ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:28:44,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-06 08:28:44,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-06 08:28:44,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 08:28:44,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2021-05-06 08:28:44,758 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 20 [2021-05-06 08:28:44,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:28:44,758 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2021-05-06 08:28:44,758 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 08:28:44,758 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2021-05-06 08:28:44,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-06 08:28:44,759 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:28:44,759 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:28:44,968 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:28:44,971 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:28:44,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:28:44,971 INFO L82 PathProgramCache]: Analyzing trace with hash -831232834, now seen corresponding path program 1 times [2021-05-06 08:28:44,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:28:44,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533588479] [2021-05-06 08:28:44,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:28:44,979 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:28:44,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1280276447] [2021-05-06 08:28:44,979 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 08:28:45,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:28:45,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 08:28:45,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:28:45,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:45,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:45,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:45,110 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 08:28:45,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:28:45,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533588479] [2021-05-06 08:28:45,110 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:28:45,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280276447] [2021-05-06 08:28:45,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280276447] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:28:45,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:28:45,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 08:28:45,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587947435] [2021-05-06 08:28:45,111 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:28:45,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:28:45,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:28:45,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:28:45,112 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 08:28:45,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:28:45,152 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2021-05-06 08:28:45,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:28:45,153 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-06 08:28:45,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:28:45,153 INFO L225 Difference]: With dead ends: 34 [2021-05-06 08:28:45,153 INFO L226 Difference]: Without dead ends: 33 [2021-05-06 08:28:45,153 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.7ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 08:28:45,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-06 08:28:45,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-06 08:28:45,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 08:28:45,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2021-05-06 08:28:45,157 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 20 [2021-05-06 08:28:45,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:28:45,157 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2021-05-06 08:28:45,157 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 08:28:45,157 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2021-05-06 08:28:45,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 08:28:45,158 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:28:45,158 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:28:45,358 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:28:45,359 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:28:45,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:28:45,359 INFO L82 PathProgramCache]: Analyzing trace with hash -870943837, now seen corresponding path program 2 times [2021-05-06 08:28:45,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:28:45,359 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872951541] [2021-05-06 08:28:45,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:28:45,367 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:28:45,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1434930822] [2021-05-06 08:28:45,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:28:45,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:28:45,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:28:45,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-06 08:28:45,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:28:45,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:45,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:45,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:45,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:45,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:45,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:45,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:45,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:45,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:45,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:28:45,926 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 08:28:45,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:28:45,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872951541] [2021-05-06 08:28:45,926 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:28:45,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434930822] [2021-05-06 08:28:45,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434930822] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:28:45,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:28:45,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:28:45,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342097390] [2021-05-06 08:28:45,927 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:28:45,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:28:45,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:28:45,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:28:45,927 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 08:29:20,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:29:20,841 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2021-05-06 08:29:20,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 08:29:20,841 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2021-05-06 08:29:20,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:29:20,842 INFO L225 Difference]: With dead ends: 42 [2021-05-06 08:29:20,842 INFO L226 Difference]: Without dead ends: 41 [2021-05-06 08:29:20,842 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 344.6ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:29:20,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-06 08:29:20,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-05-06 08:29:20,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 29 states have internal predecessors, (31), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 08:29:20,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2021-05-06 08:29:20,845 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 28 [2021-05-06 08:29:20,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:29:20,845 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2021-05-06 08:29:20,846 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 08:29:20,846 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2021-05-06 08:29:20,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-06 08:29:20,846 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:29:20,846 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:29:21,048 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-06 08:29:21,049 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:29:21,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:29:21,049 INFO L82 PathProgramCache]: Analyzing trace with hash 2080181988, now seen corresponding path program 3 times [2021-05-06 08:29:21,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:29:21,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998719557] [2021-05-06 08:29:21,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:29:21,061 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:29:21,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [477200814] [2021-05-06 08:29:21,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:29:21,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-06 08:29:21,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:29:21,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 08:29:21,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:29:21,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:21,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:21,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:21,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:21,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:21,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:21,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:21,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:21,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:21,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:21,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:21,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:21,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:21,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:21,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:29:21,395 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-06 08:29:21,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:29:21,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998719557] [2021-05-06 08:29:21,396 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:29:21,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477200814] [2021-05-06 08:29:21,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477200814] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:29:21,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:29:21,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 08:29:21,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211781813] [2021-05-06 08:29:21,396 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:29:21,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:29:21,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:29:21,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:29:21,397 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3)