/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/divbin_valuebound50.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 08:06:47,878 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 08:06:47,880 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 08:06:47,917 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 08:06:47,917 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 08:06:47,920 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 08:06:47,924 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 08:06:47,932 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 08:06:47,934 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 08:06:47,938 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 08:06:47,939 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 08:06:47,941 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2021-05-06 08:06:47,972 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 08:06:47,973 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 08:06:47,974 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 08:06:47,975 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 08:06:47,985 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 08:06:47,985 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 08:06:47,986 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 08:06:47,986 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 08:06:47,987 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 08:06:47,987 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 08:06:47,987 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 08:06:47,987 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 08:06:47,987 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 08:06:47,987 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 08:06:47,988 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 08:06:47,988 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 08:06:47,988 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 08:06:47,988 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 08:06:47,988 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 08:06:47,988 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 08:06:47,989 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 08:06:47,989 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 08:06:47,989 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 08:06:47,989 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 08:06:47,989 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 08:06:47,990 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 08:06:47,990 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 08:06:48,350 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 08:06:48,370 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 08:06:48,373 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 08:06:48,374 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 08:06:48,374 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 08:06:48,375 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/divbin_valuebound50.i [2021-05-06 08:06:48,441 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2deb2690/de8df600c59c4f1cb8c666498e162252/FLAG9105571d8 [2021-05-06 08:06:48,945 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 08:06:48,946 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin_valuebound50.i [2021-05-06 08:06:48,952 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2deb2690/de8df600c59c4f1cb8c666498e162252/FLAG9105571d8 [2021-05-06 08:06:49,419 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2deb2690/de8df600c59c4f1cb8c666498e162252 [2021-05-06 08:06:49,422 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 08:06:49,425 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 08:06:49,430 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 08:06:49,430 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 08:06:49,433 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 08:06:49,434 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:06:49" (1/1) ... [2021-05-06 08:06:49,435 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75a49523 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:06:49, skipping insertion in model container [2021-05-06 08:06:49,435 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:06:49" (1/1) ... [2021-05-06 08:06:49,446 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 08:06:49,461 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 08:06:49,564 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/divbin_valuebound50.i[958,971] [2021-05-06 08:06:49,577 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:06:49,584 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 08:06:49,595 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/divbin_valuebound50.i[958,971] [2021-05-06 08:06:49,601 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:06:49,613 INFO L208 MainTranslator]: Completed translation [2021-05-06 08:06:49,614 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:06:49 WrapperNode [2021-05-06 08:06:49,614 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 08:06:49,615 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 08:06:49,615 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 08:06:49,615 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 08:06:49,657 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:06:49" (1/1) ... [2021-05-06 08:06:49,657 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:06:49" (1/1) ... [2021-05-06 08:06:49,674 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:06:49" (1/1) ... [2021-05-06 08:06:49,675 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:06:49" (1/1) ... [2021-05-06 08:06:49,688 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:06:49" (1/1) ... [2021-05-06 08:06:49,693 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:06:49" (1/1) ... [2021-05-06 08:06:49,697 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:06:49" (1/1) ... [2021-05-06 08:06:49,702 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 08:06:49,703 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 08:06:49,704 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 08:06:49,704 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 08:06:49,704 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:06:49" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 08:06:49,783 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 08:06:49,783 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 08:06:49,783 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 08:06:49,784 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 08:06:49,784 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 08:06:49,784 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 08:06:49,784 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 08:06:49,784 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 08:06:49,784 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-06 08:06:49,784 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-06 08:06:49,785 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 08:06:49,785 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 08:06:49,785 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-06 08:06:49,785 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 08:06:49,785 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 08:06:49,786 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 08:06:49,786 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 08:06:49,786 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 08:06:49,786 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 08:06:49,786 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 08:06:49,787 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 08:06:49,787 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 08:06:50,082 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 08:06:50,082 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 08:06:50,083 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:06:50 BoogieIcfgContainer [2021-05-06 08:06:50,083 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 08:06:50,084 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 08:06:50,084 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 08:06:50,085 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 08:06:50,087 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:06:50" (1/1) ... [2021-05-06 08:06:50,101 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:06:50 BasicIcfg [2021-05-06 08:06:50,101 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 08:06:50,102 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 08:06:50,102 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 08:06:50,105 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 08:06:50,105 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 08:06:49" (1/4) ... [2021-05-06 08:06:50,105 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36c1ed70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:06:50, skipping insertion in model container [2021-05-06 08:06:50,106 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:06:49" (2/4) ... [2021-05-06 08:06:50,106 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36c1ed70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:06:50, skipping insertion in model container [2021-05-06 08:06:50,106 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:06:50" (3/4) ... [2021-05-06 08:06:50,106 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36c1ed70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 08:06:50, skipping insertion in model container [2021-05-06 08:06:50,106 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:06:50" (4/4) ... [2021-05-06 08:06:50,107 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin_valuebound50.iJordan [2021-05-06 08:06:50,112 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 08:06:50,115 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 08:06:50,130 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 08:06:50,147 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 08:06:50,147 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 08:06:50,147 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 08:06:50,147 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 08:06:50,148 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 08:06:50,148 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 08:06:50,148 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 08:06:50,148 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 08:06:50,170 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 08:06:50,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-06 08:06:50,177 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:06:50,177 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:06:50,178 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:06:50,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:06:50,183 INFO L82 PathProgramCache]: Analyzing trace with hash -402483300, now seen corresponding path program 1 times [2021-05-06 08:06:50,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:06:50,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167489115] [2021-05-06 08:06:50,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:06:50,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:06:50,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 08:06:50,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:06:50,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 08:06:50,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:06:50,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 08:06:50,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:06:50,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 08:06:50,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:06:50,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-06 08:06:50,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:06:50,504 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 08:06:50,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:06:50,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167489115] [2021-05-06 08:06:50,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167489115] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:06:50,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:06:50,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 08:06:50,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693264024] [2021-05-06 08:06:50,517 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 08:06:50,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:06:50,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 08:06:50,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 08:06:50,532 INFO L87 Difference]: Start difference. First operand has 34 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:06:50,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:06:50,676 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2021-05-06 08:06:50,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 08:06:50,679 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2021-05-06 08:06:50,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:06:50,687 INFO L225 Difference]: With dead ends: 34 [2021-05-06 08:06:50,687 INFO L226 Difference]: Without dead ends: 29 [2021-05-06 08:06:50,689 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 51.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 08:06:50,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-06 08:06:50,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-05-06 08:06:50,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 08:06:50,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2021-05-06 08:06:50,728 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 34 [2021-05-06 08:06:50,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:06:50,729 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2021-05-06 08:06:50,729 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:06:50,730 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2021-05-06 08:06:50,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-06 08:06:50,731 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:06:50,731 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:06:50,732 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 08:06:50,732 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:06:50,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:06:50,734 INFO L82 PathProgramCache]: Analyzing trace with hash 1131459816, now seen corresponding path program 1 times [2021-05-06 08:06:50,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:06:50,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294934488] [2021-05-06 08:06:50,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:06:50,771 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:06:50,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1306559434] [2021-05-06 08:06:50,772 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 08:06:50,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:06:50,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 08:06:50,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:06:50,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:06:50,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:06:51,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:06:51,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:06:51,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:06:51,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:06:51,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:06:51,277 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-06 08:06:51,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:06:51,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294934488] [2021-05-06 08:06:51,279 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:06:51,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306559434] [2021-05-06 08:06:51,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306559434] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:06:51,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:06:51,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:06:51,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979826011] [2021-05-06 08:06:51,282 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:06:51,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:06:51,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:06:51,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:06:51,287 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:06:51,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:06:51,536 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2021-05-06 08:06:51,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 08:06:51,537 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 35 [2021-05-06 08:06:51,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:06:51,540 INFO L225 Difference]: With dead ends: 42 [2021-05-06 08:06:51,540 INFO L226 Difference]: Without dead ends: 41 [2021-05-06 08:06:51,546 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 129.4ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:06:51,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-06 08:06:51,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2021-05-06 08:06:51,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 25 states have (on average 1.24) internal successors, (31), 26 states have internal predecessors, (31), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 08:06:51,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2021-05-06 08:06:51,559 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 35 [2021-05-06 08:06:51,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:06:51,560 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2021-05-06 08:06:51,561 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:06:51,561 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2021-05-06 08:06:51,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-06 08:06:51,563 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:06:51,563 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:06:51,777 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 08:06:51,777 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:06:51,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:06:51,778 INFO L82 PathProgramCache]: Analyzing trace with hash -305154333, now seen corresponding path program 1 times [2021-05-06 08:06:51,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:06:51,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258438298] [2021-05-06 08:06:51,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:06:51,794 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:06:51,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [452312589] [2021-05-06 08:06:51,794 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 08:06:51,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:06:51,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-06 08:06:51,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:06:51,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:06:51,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:06:51,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:06:51,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:06:51,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:06:51,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:06:52,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:06:52,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:06:52,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:06:52,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:06:52,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:06:52,162 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 08:06:52,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:06:52,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258438298] [2021-05-06 08:06:52,163 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:06:52,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452312589] [2021-05-06 08:06:52,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452312589] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:06:52,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:06:52,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:06:52,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920776106] [2021-05-06 08:06:52,164 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:06:52,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:06:52,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:06:52,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:06:52,165 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:06:54,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:06:54,590 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2021-05-06 08:06:54,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 08:06:54,591 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 37 [2021-05-06 08:06:54,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:06:54,592 INFO L225 Difference]: With dead ends: 54 [2021-05-06 08:06:54,592 INFO L226 Difference]: Without dead ends: 53 [2021-05-06 08:06:54,592 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 137.4ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-05-06 08:06:54,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-05-06 08:06:54,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 46. [2021-05-06 08:06:54,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 30 states have (on average 1.2) internal successors, (36), 31 states have internal predecessors, (36), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 08:06:54,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2021-05-06 08:06:54,597 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 37 [2021-05-06 08:06:54,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:06:54,598 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2021-05-06 08:06:54,598 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 08:06:54,598 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2021-05-06 08:06:54,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-06 08:06:54,599 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:06:54,599 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:06:54,800 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:06:54,801 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:06:54,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:06:54,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1858557484, now seen corresponding path program 1 times [2021-05-06 08:06:54,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:06:54,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950625858] [2021-05-06 08:06:54,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:06:54,814 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:06:54,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [548683413] [2021-05-06 08:06:54,815 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 08:06:54,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:06:54,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-06 08:06:54,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:06:54,962 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 08:06:54,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:06:54,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950625858] [2021-05-06 08:06:54,963 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:06:54,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548683413] [2021-05-06 08:06:54,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548683413] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:06:54,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:06:54,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 08:06:54,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689479924] [2021-05-06 08:06:54,964 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 08:06:54,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:06:54,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 08:06:54,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 08:06:54,967 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-06 08:06:54,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:06:54,998 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2021-05-06 08:06:54,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 08:06:54,999 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 43 [2021-05-06 08:06:54,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:06:55,000 INFO L225 Difference]: With dead ends: 45 [2021-05-06 08:06:55,001 INFO L226 Difference]: Without dead ends: 38 [2021-05-06 08:06:55,003 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 08:06:55,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-06 08:06:55,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-05-06 08:06:55,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 25 states have internal predecessors, (28), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 08:06:55,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2021-05-06 08:06:55,018 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 43 [2021-05-06 08:06:55,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:06:55,020 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2021-05-06 08:06:55,023 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-06 08:06:55,023 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2021-05-06 08:06:55,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-06 08:06:55,024 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:06:55,024 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:06:55,253 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:06:55,253 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:06:55,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:06:55,254 INFO L82 PathProgramCache]: Analyzing trace with hash 270500047, now seen corresponding path program 1 times [2021-05-06 08:06:55,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:06:55,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738205704] [2021-05-06 08:06:55,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:06:55,266 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:06:55,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [300036902] [2021-05-06 08:06:55,267 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