/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/dijkstra-u_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 07:27:17,404 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 07:27:17,406 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 07:27:17,447 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 07:27:17,467 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 07:27:17,469 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 07:27:17,470 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 07:27:17,470 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 07:27:17,474 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 07:27:17,474 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 07:27:17,477 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 07:27:17,480 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 07:27:17,481 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 07:27:17,483 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 07:27:17,484 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 07:27:17,485 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 07:27:17,487 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 07:27:17,497 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 07:27:17,497 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 07:27:17,498 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 07:27:17,502 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 07:27:17,518 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 07:27:17,519 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 07:27:17,522 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 07:27:17,522 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 07:27:17,522 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 07:27:17,522 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 07:27:17,522 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 07:27:17,522 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 07:27:17,522 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 07:27:17,523 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 07:27:17,523 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 07:27:17,524 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 07:27:17,524 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 07:27:17,524 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 07:27:17,524 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 07:27:17,524 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 07:27:17,524 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 07:27:17,525 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 07:27:17,525 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 07:27:17,525 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 07:27:17,525 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 07:27:17,526 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 07:27:17,526 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 07:27:17,874 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 07:27:17,904 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 07:27:17,906 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 07:27:17,907 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 07:27:17,908 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 07:27:17,908 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_unwindbound100.c [2021-05-06 07:27:17,969 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a69909e0/b28b32046c494ff89420ab98b2069186/FLAGb37162ec8 [2021-05-06 07:27:18,357 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 07:27:18,358 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_unwindbound100.c [2021-05-06 07:27:18,367 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a69909e0/b28b32046c494ff89420ab98b2069186/FLAGb37162ec8 [2021-05-06 07:27:18,725 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a69909e0/b28b32046c494ff89420ab98b2069186 [2021-05-06 07:27:18,727 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 07:27:18,728 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 07:27:18,729 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 07:27:18,729 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 07:27:18,735 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 07:27:18,735 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 07:27:18" (1/1) ... [2021-05-06 07:27:18,736 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@613e22aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:27:18, skipping insertion in model container [2021-05-06 07:27:18,736 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 07:27:18" (1/1) ... [2021-05-06 07:27:18,742 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 07:27:18,763 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 07:27:18,863 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/dijkstra-u_unwindbound100.c[533,546] [2021-05-06 07:27:18,899 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 07:27:18,905 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 07:27:18,920 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/dijkstra-u_unwindbound100.c[533,546] [2021-05-06 07:27:18,943 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 07:27:18,998 INFO L208 MainTranslator]: Completed translation [2021-05-06 07:27:18,999 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:27:18 WrapperNode [2021-05-06 07:27:18,999 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 07:27:19,000 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 07:27:19,001 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 07:27:19,001 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 07:27:19,011 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:27:18" (1/1) ... [2021-05-06 07:27:19,012 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:27:18" (1/1) ... [2021-05-06 07:27:19,028 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:27:18" (1/1) ... [2021-05-06 07:27:19,029 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:27:18" (1/1) ... [2021-05-06 07:27:19,034 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:27:18" (1/1) ... [2021-05-06 07:27:19,037 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:27:18" (1/1) ... [2021-05-06 07:27:19,039 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:27:18" (1/1) ... [2021-05-06 07:27:19,040 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 07:27:19,050 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 07:27:19,050 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 07:27:19,050 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 07:27:19,051 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:27:18" (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 07:27:19,124 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 07:27:19,124 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 07:27:19,124 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 07:27:19,124 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 07:27:19,125 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 07:27:19,125 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 07:27:19,125 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 07:27:19,125 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 07:27:19,126 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 07:27:19,126 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 07:27:19,126 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-06 07:27:19,126 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 07:27:19,126 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 07:27:19,127 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 07:27:19,127 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 07:27:19,127 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 07:27:19,127 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 07:27:19,127 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 07:27:19,128 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 07:27:19,128 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 07:27:19,462 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 07:27:19,462 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 07:27:19,463 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:27:19 BoogieIcfgContainer [2021-05-06 07:27:19,463 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 07:27:19,464 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 07:27:19,464 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 07:27:19,475 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 07:27:19,478 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:27:19" (1/1) ... [2021-05-06 07:27:19,492 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 07:27:19 BasicIcfg [2021-05-06 07:27:19,493 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 07:27:19,494 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 07:27:19,494 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 07:27:19,497 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 07:27:19,497 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 07:27:18" (1/4) ... [2021-05-06 07:27:19,497 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@609d62d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 07:27:19, skipping insertion in model container [2021-05-06 07:27:19,498 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:27:18" (2/4) ... [2021-05-06 07:27:19,498 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@609d62d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 07:27:19, skipping insertion in model container [2021-05-06 07:27:19,498 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:27:19" (3/4) ... [2021-05-06 07:27:19,498 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@609d62d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 07:27:19, skipping insertion in model container [2021-05-06 07:27:19,498 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 07:27:19" (4/4) ... [2021-05-06 07:27:19,499 INFO L111 eAbstractionObserver]: Analyzing ICFG dijkstra-u_unwindbound100.cJordan [2021-05-06 07:27:19,504 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 07:27:19,507 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 07:27:19,520 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 07:27:19,535 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 07:27:19,535 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 07:27:19,535 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 07:27:19,535 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 07:27:19,535 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 07:27:19,535 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 07:27:19,536 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 07:27:19,536 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 07:27:19,546 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 07:27:19,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 07:27:19,552 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:27:19,553 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:27:19,553 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:27:19,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:27:19,558 INFO L82 PathProgramCache]: Analyzing trace with hash -460462115, now seen corresponding path program 1 times [2021-05-06 07:27:19,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:27:19,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130119375] [2021-05-06 07:27:19,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:27:19,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:27:19,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 07:27:19,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:27:19,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 07:27:19,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:27:19,753 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 07:27:19,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:27:19,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130119375] [2021-05-06 07:27:19,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130119375] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:27:19,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:27:19,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 07:27:19,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9603761] [2021-05-06 07:27:19,759 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 07:27:19,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:27:19,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 07:27:19,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 07:27:19,772 INFO L87 Difference]: Start difference. First operand has 39 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 07:27:20,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:27:20,415 INFO L93 Difference]: Finished difference Result 40 states and 52 transitions. [2021-05-06 07:27:20,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 07:27:20,417 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-06 07:27:20,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:27:20,423 INFO L225 Difference]: With dead ends: 40 [2021-05-06 07:27:20,424 INFO L226 Difference]: Without dead ends: 35 [2021-05-06 07:27:20,425 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 47.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 07:27:20,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-06 07:27:20,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2021-05-06 07:27:20,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 07:27:20,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 46 transitions. [2021-05-06 07:27:20,456 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 46 transitions. Word has length 18 [2021-05-06 07:27:20,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:27:20,456 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 46 transitions. [2021-05-06 07:27:20,456 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 07:27:20,456 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 46 transitions. [2021-05-06 07:27:20,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-06 07:27:20,457 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:27:20,457 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:27:20,458 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 07:27:20,458 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:27:20,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:27:20,459 INFO L82 PathProgramCache]: Analyzing trace with hash -889932734, now seen corresponding path program 1 times [2021-05-06 07:27:20,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:27:20,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839417930] [2021-05-06 07:27:20,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:27:20,510 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:27:20,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [624835127] [2021-05-06 07:27:20,511 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 07:27:20,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:27:20,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 07:27:20,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:27:20,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:27:20,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:27:20,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:27:20,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:27:20,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:27:20,688 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 07:27:20,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:27:20,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839417930] [2021-05-06 07:27:20,689 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:27:20,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624835127] [2021-05-06 07:27:20,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624835127] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:27:20,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:27:20,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 07:27:20,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851223791] [2021-05-06 07:27:20,691 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 07:27:20,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:27:20,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 07:27:20,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 07:27:20,692 INFO L87 Difference]: Start difference. First operand 34 states and 46 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 07:27:20,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:27:20,722 INFO L93 Difference]: Finished difference Result 36 states and 48 transitions. [2021-05-06 07:27:20,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 07:27:20,723 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-06 07:27:20,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:27:20,724 INFO L225 Difference]: With dead ends: 36 [2021-05-06 07:27:20,724 INFO L226 Difference]: Without dead ends: 36 [2021-05-06 07:27:20,725 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.7ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 07:27:20,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-06 07:27:20,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-05-06 07:27:20,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 07:27:20,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 48 transitions. [2021-05-06 07:27:20,736 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 48 transitions. Word has length 20 [2021-05-06 07:27:20,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:27:20,737 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 48 transitions. [2021-05-06 07:27:20,737 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 07:27:20,737 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 48 transitions. [2021-05-06 07:27:20,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-06 07:27:20,738 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:27:20,738 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:27:20,938 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 07:27:20,939 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:27:20,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:27:20,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1699853977, now seen corresponding path program 1 times [2021-05-06 07:27:20,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:27:20,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244876613] [2021-05-06 07:27:20,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:27:20,956 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:27:20,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1338900881] [2021-05-06 07:27:20,957 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 07:27:21,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:27:21,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 07:27:21,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:27:21,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:27:21,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:27:21,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:27:21,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:27:21,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:27:21,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:27:21,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:27:21,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:27:21,122 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 07:27:21,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:27:21,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244876613] [2021-05-06 07:27:21,123 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:27:21,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338900881] [2021-05-06 07:27:21,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338900881] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:27:21,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:27:21,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 07:27:21,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710741597] [2021-05-06 07:27:21,124 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 07:27:21,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:27:21,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 07:27:21,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 07:27:21,125 INFO L87 Difference]: Start difference. First operand 36 states and 48 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 07:27:21,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:27:21,150 INFO L93 Difference]: Finished difference Result 40 states and 53 transitions. [2021-05-06 07:27:21,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 07:27:21,150 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2021-05-06 07:27:21,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:27:21,151 INFO L225 Difference]: With dead ends: 40 [2021-05-06 07:27:21,151 INFO L226 Difference]: Without dead ends: 40 [2021-05-06 07:27:21,152 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 10.6ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 07:27:21,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-06 07:27:21,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2021-05-06 07:27:21,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 07:27:21,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 52 transitions. [2021-05-06 07:27:21,157 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 52 transitions. Word has length 21 [2021-05-06 07:27:21,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:27:21,158 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 52 transitions. [2021-05-06 07:27:21,158 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 07:27:21,158 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 52 transitions. [2021-05-06 07:27:21,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-06 07:27:21,158 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:27:21,159 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:27:21,381 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:27:21,382 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:27:21,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:27:21,382 INFO L82 PathProgramCache]: Analyzing trace with hash 1700986035, now seen corresponding path program 1 times [2021-05-06 07:27:21,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:27:21,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513340140] [2021-05-06 07:27:21,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:27:21,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:27:21,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 07:27:21,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:27:21,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 07:27:21,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:27:21,683 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 07:27:21,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:27:21,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513340140] [2021-05-06 07:27:21,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513340140] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:27:21,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:27:21,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-06 07:27:21,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360360524] [2021-05-06 07:27:21,684 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 07:27:21,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:27:21,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 07:27:21,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 07:27:21,685 INFO L87 Difference]: Start difference. First operand 39 states and 52 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2)