/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/freire2_unwindbound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-1a84f73 [2021-05-01 05:14:13,397 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-01 05:14:13,398 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-01 05:14:13,421 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-01 05:14:13,422 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-01 05:14:13,424 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-01 05:14:13,425 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-01 05:14:13,429 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-01 05:14:13,431 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-01 05:14:13,435 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-01 05:14:13,436 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-01 05:14:13,436 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-01 05:14:13,436 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-01 05:14:13,437 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-01 05:14:13,437 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-01 05:14:13,438 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-01 05:14:13,441 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-01 05:14:13,441 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-01 05:14:13,443 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-01 05:14:13,446 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-01 05:14:13,447 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-01 05:14:13,448 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-01 05:14:13,449 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-01 05:14:13,450 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-01 05:14:13,454 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-01 05:14:13,458 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-01 05:14:13,459 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-01 05:14:13,459 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-01 05:14:13,460 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-01 05:14:13,475 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-01 05:14:13,475 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-01 05:14:13,476 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-01 05:14:13,476 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-01 05:14:13,476 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-01 05:14:13,477 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-01 05:14:13,477 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-01 05:14:13,477 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-01 05:14:13,477 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-01 05:14:13,477 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-01 05:14:13,477 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-01 05:14:13,477 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-01 05:14:13,478 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-01 05:14:13,478 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-01 05:14:13,478 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-01 05:14:13,478 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-01 05:14:13,478 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-01 05:14:13,478 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-01 05:14:13,478 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-01 05:14:13,478 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-01 05:14:13,479 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-01 05:14:13,479 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-01 05:14:13,479 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-01 05:14:13,749 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-01 05:14:13,767 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-01 05:14:13,769 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-01 05:14:13,771 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-01 05:14:13,771 INFO L275 PluginConnector]: CDTParser initialized [2021-05-01 05:14:13,772 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/freire2_unwindbound1.c [2021-05-01 05:14:13,820 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/93b4d7fae/54c6a8d60a864b758ff3959a3b372364/FLAGa7c5bb334 [2021-05-01 05:14:14,278 INFO L306 CDTParser]: Found 1 translation units. [2021-05-01 05:14:14,279 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/freire2_unwindbound1.c [2021-05-01 05:14:14,283 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/93b4d7fae/54c6a8d60a864b758ff3959a3b372364/FLAGa7c5bb334 [2021-05-01 05:14:14,577 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/93b4d7fae/54c6a8d60a864b758ff3959a3b372364 [2021-05-01 05:14:14,583 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-01 05:14:14,586 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-01 05:14:14,589 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-01 05:14:14,589 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-01 05:14:14,592 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-01 05:14:14,592 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 05:14:14" (1/1) ... [2021-05-01 05:14:14,593 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10f34bb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 05:14:14, skipping insertion in model container [2021-05-01 05:14:14,593 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.05 05:14:14" (1/1) ... [2021-05-01 05:14:14,598 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-01 05:14:14,610 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-01 05:14:14,726 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/freire2_unwindbound1.c[709,722] [2021-05-01 05:14:14,755 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-01 05:14:14,762 INFO L203 MainTranslator]: Completed pre-run [2021-05-01 05:14:14,806 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/freire2_unwindbound1.c[709,722] [2021-05-01 05:14:14,815 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-01 05:14:14,824 INFO L208 MainTranslator]: Completed translation [2021-05-01 05:14:14,825 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 05:14:14 WrapperNode [2021-05-01 05:14:14,825 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-01 05:14:14,825 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-01 05:14:14,825 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-01 05:14:14,826 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-01 05:14:14,832 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 05:14:14" (1/1) ... [2021-05-01 05:14:14,833 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 05:14:14" (1/1) ... [2021-05-01 05:14:14,837 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 05:14:14" (1/1) ... [2021-05-01 05:14:14,837 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 05:14:14" (1/1) ... [2021-05-01 05:14:14,841 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 05:14:14" (1/1) ... [2021-05-01 05:14:14,844 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 05:14:14" (1/1) ... [2021-05-01 05:14:14,845 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 05:14:14" (1/1) ... [2021-05-01 05:14:14,846 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-01 05:14:14,847 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-01 05:14:14,847 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-01 05:14:14,847 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-01 05:14:14,847 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 05:14:14" (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 [2021-05-01 05:14:14,889 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-01 05:14:14,889 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-01 05:14:14,889 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-01 05:14:14,889 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-01 05:14:14,889 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-01 05:14:14,889 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-01 05:14:14,889 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-01 05:14:14,889 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-01 05:14:14,889 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-01 05:14:14,890 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-01 05:14:14,890 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_double [2021-05-01 05:14:14,890 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-01 05:14:14,890 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-01 05:14:14,890 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-01 05:14:14,890 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-01 05:14:14,890 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-01 05:14:14,890 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-01 05:14:14,890 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-01 05:14:14,890 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-01 05:14:14,890 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-01 05:14:15,051 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-01 05:14:15,051 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-01 05:14:15,052 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 05:14:15 BoogieIcfgContainer [2021-05-01 05:14:15,052 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-01 05:14:15,053 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-01 05:14:15,053 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-01 05:14:15,053 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-01 05:14:15,055 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 05:14:15" (1/1) ... [2021-05-01 05:14:15,068 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 01.05 05:14:15 BasicIcfg [2021-05-01 05:14:15,068 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-01 05:14:15,069 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-01 05:14:15,069 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-01 05:14:15,071 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-01 05:14:15,071 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.05 05:14:14" (1/4) ... [2021-05-01 05:14:15,071 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25968ab0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 05:14:15, skipping insertion in model container [2021-05-01 05:14:15,071 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.05 05:14:14" (2/4) ... [2021-05-01 05:14:15,072 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25968ab0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.05 05:14:15, skipping insertion in model container [2021-05-01 05:14:15,072 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.05 05:14:15" (3/4) ... [2021-05-01 05:14:15,072 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25968ab0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.05 05:14:15, skipping insertion in model container [2021-05-01 05:14:15,072 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 01.05 05:14:15" (4/4) ... [2021-05-01 05:14:15,073 INFO L111 eAbstractionObserver]: Analyzing ICFG freire2_unwindbound1.cJordan [2021-05-01 05:14:15,076 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-01 05:14:15,079 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-01 05:14:15,090 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-01 05:14:15,102 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-01 05:14:15,102 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-01 05:14:15,102 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-01 05:14:15,102 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-01 05:14:15,102 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-01 05:14:15,102 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-01 05:14:15,102 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-01 05:14:15,102 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-01 05:14:15,110 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-01 05:14:15,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-01 05:14:15,114 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 05:14:15,115 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 05:14:15,115 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 05:14:15,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 05:14:15,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1238828824, now seen corresponding path program 1 times [2021-05-01 05:14:15,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-01 05:14:15,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074185082] [2021-05-01 05:14:15,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 05:14:15,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 05:14:15,229 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 05:14:15,231 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 05:14:15,231 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 05:14:15,232 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 05:14:15,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-01 05:14:15,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 05:14:15,306 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 05:14:15,306 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 05:14:15,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-01 05:14:15,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-01 05:14:15,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074185082] [2021-05-01 05:14:15,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074185082] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 05:14:15,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 05:14:15,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-01 05:14:15,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541090523] [2021-05-01 05:14:15,312 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-01 05:14:15,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-01 05:14:15,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-01 05:14:15,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-01 05:14:15,330 INFO L87 Difference]: Start difference. First operand has 26 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 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 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-01 05:14:15,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 05:14:15,408 INFO L93 Difference]: Finished difference Result 27 states and 33 transitions. [2021-05-01 05:14:15,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-01 05:14:15,409 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-01 05:14:15,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 05:14:15,414 INFO L225 Difference]: With dead ends: 27 [2021-05-01 05:14:15,414 INFO L226 Difference]: Without dead ends: 22 [2021-05-01 05:14:15,415 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 48.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-01 05:14:15,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-05-01 05:14:15,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2021-05-01 05:14:15,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-01 05:14:15,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2021-05-01 05:14:15,441 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 11 [2021-05-01 05:14:15,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 05:14:15,442 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2021-05-01 05:14:15,442 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-01 05:14:15,442 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2021-05-01 05:14:15,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-01 05:14:15,443 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 05:14:15,443 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 05:14:15,444 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-01 05:14:15,444 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 05:14:15,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 05:14:15,446 INFO L82 PathProgramCache]: Analyzing trace with hash -221581531, now seen corresponding path program 1 times [2021-05-01 05:14:15,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-01 05:14:15,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763689747] [2021-05-01 05:14:15,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 05:14:15,480 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-01 05:14:15,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2053762829] [2021-05-01 05:14:15,481 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 [2021-05-01 05:14:15,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-01 05:14:15,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-01 05:14:15,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-01 05:14:15,556 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 05:14:15,557 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 05:14:15,557 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 05:14:15,557 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 05:14:15,558 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 05:14:15,558 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 05:14:15,558 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 05:14:15,559 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 05:14:15,560 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 05:14:15,561 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 05:14:15,561 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 05:14:15,561 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 05:14:15,562 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 05:14:15,563 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 05:14:15,563 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 05:14:15,563 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 05:14:15,566 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 05:14:15,567 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 05:14:15,567 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 05:14:15,568 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 05:14:15,568 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 05:14:15,568 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 05:14:15,569 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 05:14:15,570 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 05:14:15,571 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 05:14:15,573 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 05:14:15,574 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 05:14:15,574 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 05:14:15,575 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 05:14:15,575 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 05:14:15,576 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 05:14:15,577 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 05:14:15,586 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 05:14:15,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-01 05:14:15,598 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 05:14:15,598 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 05:14:15,600 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-05-01 05:14:15,601 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 05:14:15,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-01 05:14:15,608 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 05:14:15,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-01 05:14:15,609 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 05:14:15,610 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 05:14:15,610 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-05-01 05:14:15,611 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-05-01 05:14:15,612 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 05:14:15,620 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 05:14:15,621 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 05:14:15,621 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 05:14:15,622 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 05:14:15,622 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 05:14:15,623 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 05:14:15,623 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 05:14:15,623 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 05:14:15,624 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 05:14:15,625 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 05:14:15,625 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 05:14:15,627 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 05:14:15,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-01 05:14:15,630 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 05:14:15,630 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 05:14:15,631 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-05-01 05:14:15,634 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 05:14:15,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-01 05:14:15,637 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 05:14:15,638 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-05-01 05:14:15,639 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-05-01 05:14:15,640 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 05:14:15,643 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 05:14:15,643 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 05:14:15,643 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-05-01 05:14:15,649 INFO L142 QuantifierPusher]: treesize reduction 8, result has 11.1 percent of original size [2021-05-01 05:14:15,649 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 05:14:15,649 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 05:14:15,650 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 05:14:15,650 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 05:14:15,650 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 05:14:15,650 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 05:14:15,651 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 05:14:15,651 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 05:14:15,652 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 05:14:15,652 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 05:14:15,652 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 05:14:15,653 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 05:14:15,654 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 05:14:15,654 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 05:14:15,654 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 05:14:15,655 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 05:14:15,657 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 05:14:15,658 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 05:14:15,658 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 05:14:15,658 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 05:14:15,659 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 05:14:15,659 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 05:14:15,660 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 05:14:15,660 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 05:14:15,662 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 05:14:15,664 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-05-01 05:14:15,664 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-05-01 05:14:15,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-01 05:14:15,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-01 05:14:15,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763689747] [2021-05-01 05:14:15,665 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-01 05:14:15,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053762829] [2021-05-01 05:14:15,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053762829] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-01 05:14:15,665 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-01 05:14:15,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-01 05:14:15,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837311283] [2021-05-01 05:14:15,666 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-01 05:14:15,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-01 05:14:15,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-01 05:14:15,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-01 05:14:15,671 INFO L87 Difference]: Start difference. First operand 21 states and 27 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-01 05:14:15,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-01 05:14:15,682 INFO L93 Difference]: Finished difference Result 23 states and 29 transitions. [2021-05-01 05:14:15,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-01 05:14:15,682 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-01 05:14:15,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-01 05:14:15,683 INFO L225 Difference]: With dead ends: 23 [2021-05-01 05:14:15,683 INFO L226 Difference]: Without dead ends: 23 [2021-05-01 05:14:15,684 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.3ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-01 05:14:15,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-05-01 05:14:15,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-05-01 05:14:15,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-01 05:14:15,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2021-05-01 05:14:15,691 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 12 [2021-05-01 05:14:15,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-01 05:14:15,691 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2021-05-01 05:14:15,691 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-01 05:14:15,691 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2021-05-01 05:14:15,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-01 05:14:15,691 INFO L511 BasicCegarLoop]: Found error trace [2021-05-01 05:14:15,691 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-01 05:14:15,905 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-01 05:14:15,905 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-01 05:14:15,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-01 05:14:15,906 INFO L82 PathProgramCache]: Analyzing trace with hash -220509055, now seen corresponding path program 1 times [2021-05-01 05:14:15,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-01 05:14:15,907 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706969283] [2021-05-01 05:14:15,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-01 05:14:15,914 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-01 05:14:15,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [231906935] [2021-05-01 05:14:15,915 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 [2021-05-01 05:14:15,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-01 05:14:15,963 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-01 05:14:15,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-01 05:14:15,973 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-01 05:14:15,993 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-01 05:14:15,994 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-05-01 05:14:16,204 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-01 05:14:16,222 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.05 05:14:16 BasicIcfg [2021-05-01 05:14:16,222 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-01 05:14:16,223 INFO L168 Benchmark]: Toolchain (without parser) took 1637.13 ms. Allocated memory is still 176.2 MB. Free memory was 141.5 MB in the beginning and 67.3 MB in the end (delta: 74.2 MB). Peak memory consumption was 74.2 MB. Max. memory is 8.0 GB. [2021-05-01 05:14:16,223 INFO L168 Benchmark]: CDTParser took 0.59 ms. Allocated memory is still 176.2 MB. Free memory is still 158.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-01 05:14:16,223 INFO L168 Benchmark]: CACSL2BoogieTranslator took 236.01 ms. Allocated memory is still 176.2 MB. Free memory was 141.4 MB in the beginning and 158.6 MB in the end (delta: -17.2 MB). Peak memory consumption was 15.5 MB. Max. memory is 8.0 GB. [2021-05-01 05:14:16,223 INFO L168 Benchmark]: Boogie Preprocessor took 20.96 ms. Allocated memory is still 176.2 MB. Free memory was 158.6 MB in the beginning and 156.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-01 05:14:16,224 INFO L168 Benchmark]: RCFGBuilder took 205.20 ms. Allocated memory is still 176.2 MB. Free memory was 156.5 MB in the beginning and 141.8 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-01 05:14:16,224 INFO L168 Benchmark]: IcfgTransformer took 15.32 ms. Allocated memory is still 176.2 MB. Free memory was 141.8 MB in the beginning and 140.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-01 05:14:16,224 INFO L168 Benchmark]: TraceAbstraction took 1153.30 ms. Allocated memory is still 176.2 MB. Free memory was 139.7 MB in the beginning and 67.3 MB in the end (delta: 72.4 MB). Peak memory consumption was 72.4 MB. Max. memory is 8.0 GB. [2021-05-01 05:14:16,226 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.59 ms. Allocated memory is still 176.2 MB. Free memory is still 158.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 236.01 ms. Allocated memory is still 176.2 MB. Free memory was 141.4 MB in the beginning and 158.6 MB in the end (delta: -17.2 MB). Peak memory consumption was 15.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 20.96 ms. Allocated memory is still 176.2 MB. Free memory was 158.6 MB in the beginning and 156.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 205.20 ms. Allocated memory is still 176.2 MB. Free memory was 156.5 MB in the beginning and 141.8 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 15.32 ms. Allocated memory is still 176.2 MB. Free memory was 141.8 MB in the beginning and 140.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1153.30 ms. Allocated memory is still 176.2 MB. Free memory was 139.7 MB in the beginning and 67.3 MB in the end (delta: 72.4 MB). Peak memory consumption was 72.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 19]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of to_int at line 34. Possible FailurePath: [L24] int counter = 0; VAL [\old(counter)=15, counter=0] [L26] int r; [L27] double a, x, s; [L28] a = __VERIFIER_nondet_double() [L29] x = a [L30] s = 3.25 [L31] r = 1 VAL [\old(counter)=0, a=2, counter=0, r=1, s=13/4, x=2] [L33] EXPR counter++ VAL [\old(counter)=0, a=2, counter=1, counter++=0, r=1, s=13/4, x=2] [L33] COND TRUE counter++<1 [L34] CALL __VERIFIER_assert((int)(4*s) - 12*r*r == 1) VAL [\old(cond)=0, \old(counter)=0, counter=1] [L17] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=1] [L19] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1104.8ms, OverallIterations: 3, TraceHistogramMax: 1, EmptinessCheckTime: 7.6ms, AutomataDifference: 119.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 5.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 55 SDtfs, 6 SDslu, 48 SDs, 0 SdLazy, 23 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 53.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 53.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=26occurred in iteration=0, InterpolantAutomatonStates: 7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 24.1ms AutomataMinimizationTime, 2 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 21.4ms SsaConstructionTime, 56.1ms SatisfiabilityAnalysisTime, 236.3ms InterpolantComputationTime, 35 NumberOfCodeBlocks, 35 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 21 ConstructedInterpolants, 0 QuantifiedInterpolants, 66 SizeOfPredicates, 1 NumberOfNonLiveVariables, 103 ConjunctsInSsa, 5 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 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 could not prove your program: unable to determine feasibility of some traces Received shutdown request...