/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/bresenham-ll_unwindbound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 07:08:17,968 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 07:08:17,970 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 07:08:18,003 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 07:08:18,003 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 07:08:18,005 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 07:08:18,007 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 07:08:18,011 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 07:08:18,012 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 07:08:18,015 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 07:08:18,016 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 07:08:18,017 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 07:08:18,017 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 07:08:18,018 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 07:08:18,019 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 07:08:18,021 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 07:08:18,023 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 07:08:18,024 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 07:08:18,025 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 07:08:18,031 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 07:08:18,031 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 07:08:18,032 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 07:08:18,033 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 07:08:18,034 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 07:08:18,039 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 07:08:18,044 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 07:08:18,045 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 07:08:18,047 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 07:08:18,047 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 07:08:18,076 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 07:08:18,076 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 07:08:18,079 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 07:08:18,079 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 07:08:18,079 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 07:08:18,079 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 07:08:18,079 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 07:08:18,079 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 07:08:18,079 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 07:08:18,079 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 07:08:18,080 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 07:08:18,080 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 07:08:18,080 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 07:08:18,080 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 07:08:18,080 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 07:08:18,081 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 07:08:18,081 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 07:08:18,081 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 07:08:18,081 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 07:08:18,081 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 07:08:18,081 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 07:08:18,082 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 07:08:18,082 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 07:08:18,417 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 07:08:18,433 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 07:08:18,435 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 07:08:18,435 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 07:08:18,436 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 07:08:18,436 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_unwindbound1.c [2021-05-06 07:08:18,487 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/92e9dbfac/6103cc835eb6491da72ff2b1463ee9bf/FLAGa48442dcc [2021-05-06 07:08:18,893 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 07:08:18,894 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_unwindbound1.c [2021-05-06 07:08:18,899 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/92e9dbfac/6103cc835eb6491da72ff2b1463ee9bf/FLAGa48442dcc [2021-05-06 07:08:18,913 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/92e9dbfac/6103cc835eb6491da72ff2b1463ee9bf [2021-05-06 07:08:18,915 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 07:08:18,917 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 07:08:18,919 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 07:08:18,919 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 07:08:18,921 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 07:08:18,922 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 07:08:18" (1/1) ... [2021-05-06 07:08:18,923 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31ea4441 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:08:18, skipping insertion in model container [2021-05-06 07:08:18,923 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 07:08:18" (1/1) ... [2021-05-06 07:08:18,927 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 07:08:18,938 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 07:08:19,054 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/bresenham-ll_unwindbound1.c[597,610] [2021-05-06 07:08:19,085 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 07:08:19,090 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 07:08:19,113 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/bresenham-ll_unwindbound1.c[597,610] [2021-05-06 07:08:19,131 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 07:08:19,139 INFO L208 MainTranslator]: Completed translation [2021-05-06 07:08:19,140 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:08:19 WrapperNode [2021-05-06 07:08:19,140 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 07:08:19,141 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 07:08:19,141 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 07:08:19,141 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 07:08:19,148 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:08:19" (1/1) ... [2021-05-06 07:08:19,149 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:08:19" (1/1) ... [2021-05-06 07:08:19,153 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:08:19" (1/1) ... [2021-05-06 07:08:19,153 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:08:19" (1/1) ... [2021-05-06 07:08:19,162 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:08:19" (1/1) ... [2021-05-06 07:08:19,165 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:08:19" (1/1) ... [2021-05-06 07:08:19,169 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:08:19" (1/1) ... [2021-05-06 07:08:19,172 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 07:08:19,173 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 07:08:19,173 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 07:08:19,173 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 07:08:19,174 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:08:19" (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 07:08:19,299 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 07:08:19,299 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 07:08:19,300 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 07:08:19,300 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 07:08:19,300 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 07:08:19,300 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 07:08:19,300 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 07:08:19,301 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 07:08:19,301 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 07:08:19,301 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 07:08:19,301 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 07:08:19,301 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 07:08:19,301 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 07:08:19,301 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 07:08:19,302 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 07:08:19,302 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 07:08:19,302 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 07:08:19,302 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 07:08:19,303 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 07:08:19,303 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 07:08:19,553 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 07:08:19,553 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 07:08:19,554 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:08:19 BoogieIcfgContainer [2021-05-06 07:08:19,554 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 07:08:19,555 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 07:08:19,555 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 07:08:19,555 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 07:08:19,557 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:08:19" (1/1) ... [2021-05-06 07:08:19,566 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 07:08:19 BasicIcfg [2021-05-06 07:08:19,566 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 07:08:19,567 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 07:08:19,567 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 07:08:19,573 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 07:08:19,573 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 07:08:18" (1/4) ... [2021-05-06 07:08:19,574 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7212b5fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 07:08:19, skipping insertion in model container [2021-05-06 07:08:19,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:08:19" (2/4) ... [2021-05-06 07:08:19,574 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7212b5fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 07:08:19, skipping insertion in model container [2021-05-06 07:08:19,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:08:19" (3/4) ... [2021-05-06 07:08:19,575 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7212b5fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 07:08:19, skipping insertion in model container [2021-05-06 07:08:19,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 07:08:19" (4/4) ... [2021-05-06 07:08:19,575 INFO L111 eAbstractionObserver]: Analyzing ICFG bresenham-ll_unwindbound1.cJordan [2021-05-06 07:08:19,579 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 07:08:19,581 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 07:08:19,594 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 07:08:19,616 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 07:08:19,617 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 07:08:19,617 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 07:08:19,617 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 07:08:19,617 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 07:08:19,617 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 07:08:19,617 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 07:08:19,617 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 07:08:19,630 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 07:08:19,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 07:08:19,635 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:08:19,636 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:08:19,636 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:08:19,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:08:19,640 INFO L82 PathProgramCache]: Analyzing trace with hash -498253564, now seen corresponding path program 1 times [2021-05-06 07:08:19,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:08:19,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937287593] [2021-05-06 07:08:19,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:08:19,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:08:19,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 07:08:19,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:08:19,861 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 07:08:19,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:08:19,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937287593] [2021-05-06 07:08:19,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937287593] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:08:19,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:08:19,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 07:08:19,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091175241] [2021-05-06 07:08:19,866 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 07:08:19,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:08:19,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 07:08:19,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 07:08:19,877 INFO L87 Difference]: Start difference. First operand has 25 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 07:08:19,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:08:19,949 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2021-05-06 07:08:19,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 07:08:19,951 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-06 07:08:19,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:08:19,956 INFO L225 Difference]: With dead ends: 26 [2021-05-06 07:08:19,956 INFO L226 Difference]: Without dead ends: 21 [2021-05-06 07:08:19,957 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 57.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 07:08:19,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-05-06 07:08:19,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2021-05-06 07:08:19,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 07:08:19,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2021-05-06 07:08:19,980 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 12 [2021-05-06 07:08:19,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:08:19,980 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2021-05-06 07:08:19,981 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 07:08:19,981 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2021-05-06 07:08:19,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 07:08:19,981 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:08:19,981 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:08:19,982 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 07:08:19,982 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:08:19,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:08:19,982 INFO L82 PathProgramCache]: Analyzing trace with hash -467747580, now seen corresponding path program 1 times [2021-05-06 07:08:19,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:08:19,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740339542] [2021-05-06 07:08:19,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:08:20,005 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:08:20,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1388970548] [2021-05-06 07:08:20,006 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 07:08:20,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:08:20,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 07:08:20,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:08:20,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:08:20,217 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 07:08:20,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:08:20,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740339542] [2021-05-06 07:08:20,218 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:08:20,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388970548] [2021-05-06 07:08:20,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388970548] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:08:20,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:08:20,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 07:08:20,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186930586] [2021-05-06 07:08:20,219 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 07:08:20,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:08:20,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 07:08:20,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 07:08:20,220 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 07:08:20,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:08:20,293 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2021-05-06 07:08:20,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 07:08:20,294 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-06 07:08:20,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:08:20,295 INFO L225 Difference]: With dead ends: 32 [2021-05-06 07:08:20,295 INFO L226 Difference]: Without dead ends: 29 [2021-05-06 07:08:20,295 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 49.3ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-06 07:08:20,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-06 07:08:20,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2021-05-06 07:08:20,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 07:08:20,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2021-05-06 07:08:20,299 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 12 [2021-05-06 07:08:20,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:08:20,299 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2021-05-06 07:08:20,299 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 07:08:20,299 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2021-05-06 07:08:20,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 07:08:20,300 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:08:20,300 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:08:20,518 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 07:08:20,518 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:08:20,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:08:20,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1909475431, now seen corresponding path program 1 times [2021-05-06 07:08:20,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:08:20,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742831218] [2021-05-06 07:08:20,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:08:20,528 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:08:20,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1245930548] [2021-05-06 07:08:20,528 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 07:08:20,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:08:20,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 07:08:20,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:08:20,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:08:20,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:08:20,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:08:20,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:08:20,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:08:20,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:08:20,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:08:20,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:08:20,663 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 07:08:20,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:08:20,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742831218] [2021-05-06 07:08:20,664 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:08:20,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245930548] [2021-05-06 07:08:20,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245930548] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:08:20,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:08:20,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-06 07:08:20,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576118698] [2021-05-06 07:08:20,664 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 07:08:20,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:08:20,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 07:08:20,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 07:08:20,665 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 07:08:20,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:08:20,690 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2021-05-06 07:08:20,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 07:08:20,691 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2021-05-06 07:08:20,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:08:20,692 INFO L225 Difference]: With dead ends: 26 [2021-05-06 07:08:20,692 INFO L226 Difference]: Without dead ends: 24 [2021-05-06 07:08:20,692 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 16.3ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-05-06 07:08:20,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-05-06 07:08:20,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-05-06 07:08:20,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 17 states have internal predecessors, (18), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 07:08:20,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2021-05-06 07:08:20,694 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2021-05-06 07:08:20,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:08:20,694 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2021-05-06 07:08:20,695 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 07:08:20,695 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2021-05-06 07:08:20,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 07:08:20,695 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:08:20,695 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:08:20,912 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:08:20,912 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:08:20,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:08:20,913 INFO L82 PathProgramCache]: Analyzing trace with hash -968220272, now seen corresponding path program 1 times [2021-05-06 07:08:20,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:08:20,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326026757] [2021-05-06 07:08:20,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:08:20,919 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:08:20,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [660737184] [2021-05-06 07:08:20,920 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 07:08:20,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:08:20,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 07:08:20,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:08:21,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:08:21,132 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 07:08:21,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:08:21,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326026757] [2021-05-06 07:08:21,133 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:08:21,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660737184] [2021-05-06 07:08:21,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660737184] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:08:21,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:08:21,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 07:08:21,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369134939] [2021-05-06 07:08:21,134 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 07:08:21,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:08:21,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 07:08:21,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 07:08:21,135 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 07:08:21,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:08:21,204 INFO L93 Difference]: Finished difference Result 31 states and 30 transitions. [2021-05-06 07:08:21,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 07:08:21,204 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2021-05-06 07:08:21,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:08:21,205 INFO L225 Difference]: With dead ends: 31 [2021-05-06 07:08:21,205 INFO L226 Difference]: Without dead ends: 24 [2021-05-06 07:08:21,205 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 78.4ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-06 07:08:21,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-05-06 07:08:21,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-05-06 07:08:21,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.0) internal successors, (17), 17 states have internal predecessors, (17), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 07:08:21,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 23 transitions. [2021-05-06 07:08:21,208 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 23 transitions. Word has length 23 [2021-05-06 07:08:21,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:08:21,208 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 23 transitions. [2021-05-06 07:08:21,208 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 07:08:21,208 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 23 transitions. [2021-05-06 07:08:21,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 07:08:21,209 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:08:21,209 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:08:21,425 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:08:21,426 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:08:21,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:08:21,426 INFO L82 PathProgramCache]: Analyzing trace with hash 1519292561, now seen corresponding path program 1 times [2021-05-06 07:08:21,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:08:21,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102145535] [2021-05-06 07:08:21,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:08:21,433 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:08:21,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1066306571] [2021-05-06 07:08:21,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:08:21,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-06 07:08:21,519 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-06 07:08:21,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-06 07:08:21,536 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-06 07:08:21,564 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-06 07:08:21,564 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-06 07:08:21,780 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:08:21,800 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 07:08:21 BasicIcfg [2021-05-06 07:08:21,800 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 07:08:21,801 INFO L168 Benchmark]: Toolchain (without parser) took 2884.28 ms. Allocated memory was 191.9 MB in the beginning and 250.6 MB in the end (delta: 58.7 MB). Free memory was 157.2 MB in the beginning and 195.5 MB in the end (delta: -38.4 MB). Peak memory consumption was 19.5 MB. Max. memory is 8.0 GB. [2021-05-06 07:08:21,801 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 191.9 MB. Free memory is still 173.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 07:08:21,801 INFO L168 Benchmark]: CACSL2BoogieTranslator took 221.15 ms. Allocated memory is still 191.9 MB. Free memory was 157.0 MB in the beginning and 174.7 MB in the end (delta: -17.7 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-05-06 07:08:21,801 INFO L168 Benchmark]: Boogie Preprocessor took 31.16 ms. Allocated memory is still 191.9 MB. Free memory was 174.7 MB in the beginning and 173.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 07:08:21,802 INFO L168 Benchmark]: RCFGBuilder took 381.60 ms. Allocated memory is still 191.9 MB. Free memory was 173.1 MB in the beginning and 157.4 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-06 07:08:21,802 INFO L168 Benchmark]: IcfgTransformer took 11.26 ms. Allocated memory is still 191.9 MB. Free memory was 157.4 MB in the beginning and 156.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 07:08:21,802 INFO L168 Benchmark]: TraceAbstraction took 2233.52 ms. Allocated memory was 191.9 MB in the beginning and 250.6 MB in the end (delta: 58.7 MB). Free memory was 155.8 MB in the beginning and 195.5 MB in the end (delta: -39.7 MB). Peak memory consumption was 19.5 MB. Max. memory is 8.0 GB. [2021-05-06 07:08:21,803 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 191.9 MB. Free memory is still 173.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 221.15 ms. Allocated memory is still 191.9 MB. Free memory was 157.0 MB in the beginning and 174.7 MB in the end (delta: -17.7 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 31.16 ms. Allocated memory is still 191.9 MB. Free memory was 174.7 MB in the beginning and 173.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 381.60 ms. Allocated memory is still 191.9 MB. Free memory was 173.1 MB in the beginning and 157.4 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 11.26 ms. Allocated memory is still 191.9 MB. Free memory was 157.4 MB in the beginning and 156.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2233.52 ms. Allocated memory was 191.9 MB in the beginning and 250.6 MB in the end (delta: 58.7 MB). Free memory was 155.8 MB in the beginning and 195.5 MB in the end (delta: -39.7 MB). Peak memory consumption was 19.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 16]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L21] int counter = 0; VAL [\old(counter)=16, counter=0] [L23] int X, Y; [L24] long long x, y, v, xy, yx; [L25] X = __VERIFIER_nondet_int() [L26] Y = __VERIFIER_nondet_int() [L27] v = ((long long) 2 * Y) - X [L28] y = 0 [L29] x = 0 VAL [\old(counter)=0, counter=0, v=0, x=0, X=4, y=0, Y=2] [L31] EXPR counter++ VAL [\old(counter)=0, counter=1, counter++=0, v=0, x=0, X=4, Y=2, y=0] [L31] COND TRUE counter++<1 [L32] yx = (long long) Y*x [L33] xy = (long long) X*y VAL [\old(counter)=0, counter=1, v=0, x=0, x=0, x=0, X=4, y=0, Y=2] [L34] CALL __VERIFIER_assert( 2*yx - 2*xy - X + (long long) 2*Y - v == 0) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L14] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L34] RET __VERIFIER_assert( 2*yx - 2*xy - X + (long long) 2*Y - v == 0) VAL [\old(counter)=0, counter=1, v=0, x=0, X=4, x=0, x=0, Y=2, y=0] [L35] COND FALSE !(!(x <= X)) VAL [\old(counter)=0, counter=1, v=0, x=0, x=0, X=4, x=0, Y=2, y=0] [L39] COND FALSE !(v < 0) [L42] v = v + 2 * ((long long) Y - X) [L43] y++ VAL [\old(counter)=0, counter=1, v=-4, X=4, x=0, x=0, x=0, y=1, Y=2] [L45] x++ VAL [\old(counter)=0, counter=1, v=-4, x=1, X=4, x=0, x=0, Y=2, y=1] [L31] EXPR counter++ VAL [\old(counter)=0, counter=2, counter++=1, v=-4, x=1, x=0, x=0, X=4, Y=2, y=1] [L31] COND FALSE !(counter++<1) [L47] xy = (long long) x*y [L48] yx = (long long) Y*x VAL [\old(counter)=0, counter=2, v=-4, x=1, X=4, x=1, x=2, y=1, Y=2] [L49] CALL __VERIFIER_assert(2*yx - 2*xy - X + (long long) 2*Y - v + 2*y == 0) VAL [\old(cond)=0, \old(counter)=0, counter=2] [L14] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=2] [L16] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=2] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2165.9ms, OverallIterations: 5, TraceHistogramMax: 2, EmptinessCheckTime: 11.6ms, AutomataDifference: 265.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 8.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 78 SDtfs, 36 SDslu, 167 SDs, 0 SdLazy, 131 SolverSat, 13 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 128.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 63 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 201.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=28occurred in iteration=2, InterpolantAutomatonStates: 22, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 21.5ms AutomataMinimizationTime, 4 MinimizatonAttempts, 2 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 71.3ms SsaConstructionTime, 110.4ms SatisfiabilityAnalysisTime, 470.2ms InterpolantComputationTime, 92 NumberOfCodeBlocks, 92 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 65 ConstructedInterpolants, 0 QuantifiedInterpolants, 310 SizeOfPredicates, 7 NumberOfNonLiveVariables, 387 ConjunctsInSsa, 39 ConjunctsInUnsatCore, 4 InterpolantComputations, 2 PerfectInterpolantSequences, 6/9 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...