/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_unwindbound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 07:26:49,949 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 07:26:49,950 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 07:26:49,994 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 07:26:49,995 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 07:26:49,996 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 07:26:49,997 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 07:26:50,000 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 07:26:50,001 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 07:26:50,002 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 07:26:50,003 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 07:26:50,003 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 07:26:50,004 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 07:26:50,005 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 07:26:50,005 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 07:26:50,006 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 07:26:50,007 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 07:26:50,007 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 07:26:50,012 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 07:26:50,019 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 07:26:50,021 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 07:26:50,025 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 07:26:50,026 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 07:26:50,028 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 07:26:50,035 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 07:26:50,040 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 07:26:50,041 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 07:26:50,041 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 07:26:50,042 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 07:26:50,066 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 07:26:50,067 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 07:26:50,069 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 07:26:50,069 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 07:26:50,070 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 07:26:50,070 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 07:26:50,070 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 07:26:50,070 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 07:26:50,071 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 07:26:50,071 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 07:26:50,072 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 07:26:50,072 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 07:26:50,072 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 07:26:50,073 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 07:26:50,073 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 07:26:50,073 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 07:26:50,073 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 07:26:50,073 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 07:26:50,073 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 07:26:50,073 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 07:26:50,073 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 07:26:50,075 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 07:26:50,075 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 07:26:50,300 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 07:26:50,317 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 07:26:50,318 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 07:26:50,319 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 07:26:50,320 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 07:26:50,321 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_unwindbound1.c [2021-05-06 07:26:50,378 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44c0bf8e3/e1929dfa0e2143df95de2c7ecec43950/FLAG4ec694e2a [2021-05-06 07:26:50,774 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 07:26:50,775 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_unwindbound1.c [2021-05-06 07:26:50,782 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44c0bf8e3/e1929dfa0e2143df95de2c7ecec43950/FLAG4ec694e2a [2021-05-06 07:26:50,798 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44c0bf8e3/e1929dfa0e2143df95de2c7ecec43950 [2021-05-06 07:26:50,801 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 07:26:50,803 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 07:26:50,807 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 07:26:50,807 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 07:26:50,810 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 07:26:50,811 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 07:26:50" (1/1) ... [2021-05-06 07:26:50,811 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@450b3154 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:26:50, skipping insertion in model container [2021-05-06 07:26:50,811 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 07:26:50" (1/1) ... [2021-05-06 07:26:50,816 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 07:26:50,835 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 07:26:50,958 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_unwindbound1.c[533,546] [2021-05-06 07:26:51,035 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 07:26:51,040 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 07:26:51,048 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_unwindbound1.c[533,546] [2021-05-06 07:26:51,055 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 07:26:51,068 INFO L208 MainTranslator]: Completed translation [2021-05-06 07:26:51,069 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:26:51 WrapperNode [2021-05-06 07:26:51,069 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 07:26:51,070 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 07:26:51,070 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 07:26:51,070 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 07:26:51,080 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:26:51" (1/1) ... [2021-05-06 07:26:51,080 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:26:51" (1/1) ... [2021-05-06 07:26:51,095 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:26:51" (1/1) ... [2021-05-06 07:26:51,095 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:26:51" (1/1) ... [2021-05-06 07:26:51,103 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:26:51" (1/1) ... [2021-05-06 07:26:51,105 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:26:51" (1/1) ... [2021-05-06 07:26:51,106 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:26:51" (1/1) ... [2021-05-06 07:26:51,107 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 07:26:51,108 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 07:26:51,108 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 07:26:51,108 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 07:26:51,109 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:26:51" (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 07:26:51,168 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 07:26:51,168 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 07:26:51,168 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 07:26:51,168 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 07:26:51,168 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 07:26:51,168 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 07:26:51,168 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 07:26:51,169 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 07:26:51,169 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 07:26:51,169 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 07:26:51,169 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-06 07:26:51,169 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 07:26:51,169 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 07:26:51,169 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 07:26:51,169 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 07:26:51,169 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 07:26:51,169 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 07:26:51,169 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 07:26:51,169 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 07:26:51,170 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 07:26:51,449 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 07:26:51,449 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 07:26:51,450 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:26:51 BoogieIcfgContainer [2021-05-06 07:26:51,450 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 07:26:51,451 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 07:26:51,451 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 07:26:51,451 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 07:26:51,453 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:26:51" (1/1) ... [2021-05-06 07:26:51,470 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 07:26:51 BasicIcfg [2021-05-06 07:26:51,471 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 07:26:51,472 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 07:26:51,473 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 07:26:51,475 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 07:26:51,476 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 07:26:50" (1/4) ... [2021-05-06 07:26:51,477 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4017052a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 07:26:51, skipping insertion in model container [2021-05-06 07:26:51,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:26:51" (2/4) ... [2021-05-06 07:26:51,477 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4017052a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 07:26:51, skipping insertion in model container [2021-05-06 07:26:51,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:26:51" (3/4) ... [2021-05-06 07:26:51,479 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4017052a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 07:26:51, skipping insertion in model container [2021-05-06 07:26:51,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 07:26:51" (4/4) ... [2021-05-06 07:26:51,480 INFO L111 eAbstractionObserver]: Analyzing ICFG dijkstra-u_unwindbound1.cJordan [2021-05-06 07:26:51,485 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 07:26:51,489 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 07:26:51,499 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 07:26:51,518 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 07:26:51,518 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 07:26:51,518 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 07:26:51,518 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 07:26:51,519 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 07:26:51,519 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 07:26:51,519 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 07:26:51,519 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 07:26:51,532 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 07:26:51,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 07:26:51,537 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:26:51,538 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 07:26:51,538 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:26:51,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:26:51,543 INFO L82 PathProgramCache]: Analyzing trace with hash -460462115, now seen corresponding path program 1 times [2021-05-06 07:26:51,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:26:51,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539296355] [2021-05-06 07:26:51,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:26:51,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:26:51,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 07:26:51,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:26:51,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 07:26:51,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:26:51,748 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 07:26:51,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:26:51,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539296355] [2021-05-06 07:26:51,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539296355] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:26:51,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:26:51,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 07:26:51,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426834313] [2021-05-06 07:26:51,752 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 07:26:51,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:26:51,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 07:26:51,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 07:26:51,762 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)