/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-POR-Persistent-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-cond-5.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a47a088281b0b97d17910950432b7c5b5bc3adeb-a47a088 [2021-07-14 08:35:50,180 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-14 08:35:50,181 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-14 08:35:50,208 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-14 08:35:50,254 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-POR-Persistent-NoLbe.epf [2021-07-14 08:35:50,278 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-14 08:35:50,278 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-14 08:35:50,279 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-14 08:35:50,279 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-14 08:35:50,280 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-14 08:35:50,280 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-14 08:35:50,280 INFO L138 SettingsManager]: * Use SBE=true [2021-07-14 08:35:50,280 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-14 08:35:50,280 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-14 08:35:50,280 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-14 08:35:50,280 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-14 08:35:50,280 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-14 08:35:50,280 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-14 08:35:50,281 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-14 08:35:50,281 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-14 08:35:50,281 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-14 08:35:50,281 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-14 08:35:50,281 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-14 08:35:50,281 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-14 08:35:50,281 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-14 08:35:50,281 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-14 08:35:50,281 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-14 08:35:50,281 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-14 08:35:50,282 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-14 08:35:50,282 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-14 08:35:50,282 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-14 08:35:50,295 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-14 08:35:50,295 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-14 08:35:50,295 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-14 08:35:50,295 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-14 08:35:50,295 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PARTIAL_ORDER_FA [2021-07-14 08:35:50,295 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-14 08:35:50,296 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=PERSISTENT_SETS [2021-07-14 08:35:50,296 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-14 08:35:50,553 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-14 08:35:50,576 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-14 08:35:50,579 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-14 08:35:50,579 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-14 08:35:50,580 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-14 08:35:50,581 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-cond-5.wvr.bpl [2021-07-14 08:35:50,581 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-cond-5.wvr.bpl' [2021-07-14 08:35:50,601 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-14 08:35:50,602 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-14 08:35:50,603 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-14 08:35:50,603 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-14 08:35:50,603 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-14 08:35:50,611 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "unroll-cond-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.07 08:35:50" (1/1) ... [2021-07-14 08:35:50,617 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "unroll-cond-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.07 08:35:50" (1/1) ... [2021-07-14 08:35:50,623 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-14 08:35:50,625 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-14 08:35:50,625 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-14 08:35:50,625 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-14 08:35:50,630 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "unroll-cond-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.07 08:35:50" (1/1) ... [2021-07-14 08:35:50,630 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "unroll-cond-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.07 08:35:50" (1/1) ... [2021-07-14 08:35:50,631 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "unroll-cond-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.07 08:35:50" (1/1) ... [2021-07-14 08:35:50,631 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "unroll-cond-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.07 08:35:50" (1/1) ... [2021-07-14 08:35:50,633 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "unroll-cond-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.07 08:35:50" (1/1) ... [2021-07-14 08:35:50,635 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "unroll-cond-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.07 08:35:50" (1/1) ... [2021-07-14 08:35:50,635 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "unroll-cond-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.07 08:35:50" (1/1) ... [2021-07-14 08:35:50,636 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-14 08:35:50,637 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-14 08:35:50,637 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-14 08:35:50,637 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-14 08:35:50,638 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "unroll-cond-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.07 08:35:50" (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 [2021-07-14 08:35:50,683 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-14 08:35:50,683 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-14 08:35:50,684 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-14 08:35:50,684 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-14 08:35:50,684 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-14 08:35:50,684 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-14 08:35:50,684 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-14 08:35:50,684 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-14 08:35:50,684 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-14 08:35:50,685 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-14 08:35:50,999 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-14 08:35:50,999 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-07-14 08:35:51,000 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-07-14 08:35:51,001 INFO L202 PluginConnector]: Adding new model unroll-cond-5.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 08:35:51 BoogieIcfgContainer [2021-07-14 08:35:51,001 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-14 08:35:51,002 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-14 08:35:51,002 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-14 08:35:51,009 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-14 08:35:51,009 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-cond-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 14.07 08:35:50" (1/2) ... [2021-07-14 08:35:51,010 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57e7a7ab and model type unroll-cond-5.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.07 08:35:51, skipping insertion in model container [2021-07-14 08:35:51,010 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-cond-5.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 08:35:51" (2/2) ... [2021-07-14 08:35:51,011 INFO L111 eAbstractionObserver]: Analyzing ICFG unroll-cond-5.wvr.bpl [2021-07-14 08:35:51,015 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-14 08:35:51,015 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-14 08:35:51,015 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-14 08:35:51,015 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-14 08:35:51,038 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-07-14 08:35:51,055 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-07-14 08:35:51,094 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-14 08:35:51,094 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-14 08:35:51,094 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-14 08:35:51,095 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-14 08:35:51,095 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-14 08:35:51,104 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-14 08:35:51,104 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-14 08:35:51,104 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-14 08:35:51,135 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-14 08:35:51,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-14 08:35:51,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1744122695, now seen corresponding path program 1 times [2021-07-14 08:35:51,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-14 08:35:51,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618025993] [2021-07-14 08:35:51,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-14 08:35:51,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-14 08:35:51,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-14 08:35:51,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-14 08:35:51,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618025993] [2021-07-14 08:35:51,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618025993] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-14 08:35:51,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-14 08:35:51,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-14 08:35:51,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382756667] [2021-07-14 08:35:51,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-14 08:35:51,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-14 08:35:51,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-14 08:35:51,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-14 08:35:51,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-07-14 08:35:51,353 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-07-14 08:35:51,355 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-14 08:35:51,355 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-07-14 08:35:51,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-14 08:35:51,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-14 08:35:51,389 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-14 08:35:51,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-14 08:35:51,391 INFO L82 PathProgramCache]: Analyzing trace with hash -298071255, now seen corresponding path program 1 times [2021-07-14 08:35:51,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-14 08:35:51,391 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965784991] [2021-07-14 08:35:51,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-14 08:35:51,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-14 08:35:52,554 WARN L205 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 5498 DAG size of output: 50 [2021-07-14 08:35:52,678 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 35 [2021-07-14 08:35:53,425 WARN L205 SmtUtils]: Spent 709.00 ms on a formula simplification. DAG size of input: 5496 DAG size of output: 12 [2021-07-14 08:35:53,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-14 08:35:53,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-14 08:35:53,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965784991] [2021-07-14 08:35:53,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965784991] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-14 08:35:53,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887422216] [2021-07-14 08:35:53,439 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 [2021-07-14 08:35:53,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-14 08:35:53,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-14 08:35:53,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-14 08:35:54,793 WARN L205 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 2125 DAG size of output: 13 [2021-07-14 08:35:54,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-07-14 08:35:54,825 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-14 08:35:54,826 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-14 08:35:54,827 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-14 08:35:54,827 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:3 [2021-07-14 08:35:54,834 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-14 08:35:54,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887422216] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-14 08:35:54,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-14 08:35:54,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-07-14 08:35:54,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496958019] [2021-07-14 08:35:54,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-14 08:35:54,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-14 08:35:54,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-14 08:35:54,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-07-14 08:35:54,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-07-14 08:35:54,836 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-07-14 08:35:54,836 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-14 08:35:54,836 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-07-14 08:35:54,836 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-07-14 08:35:54,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-14 08:35:54,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-14 08:35:55,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-14 08:35:55,101 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-14 08:35:55,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-14 08:35:55,102 INFO L82 PathProgramCache]: Analyzing trace with hash 818425735, now seen corresponding path program 2 times [2021-07-14 08:35:55,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-14 08:35:55,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278511553] [2021-07-14 08:35:55,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-14 08:35:55,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-14 08:35:55,621 WARN L205 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 2869 DAG size of output: 52 [2021-07-14 08:35:55,775 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 31 [2021-07-14 08:35:56,614 WARN L205 SmtUtils]: Spent 801.00 ms on a formula simplification. DAG size of input: 5579 DAG size of output: 55 [2021-07-14 08:35:57,487 WARN L205 SmtUtils]: Spent 776.00 ms on a formula simplification. DAG size of input: 5577 DAG size of output: 17 [2021-07-14 08:35:57,508 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-14 08:35:57,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-14 08:35:57,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278511553] [2021-07-14 08:35:57,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278511553] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-14 08:35:57,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977237829] [2021-07-14 08:35:57,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2021-07-14 08:35:57,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-14 08:35:57,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-14 08:35:57,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-14 08:35:57,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-14 08:35:58,455 WARN L205 SmtUtils]: Spent 826.00 ms on a formula simplification. DAG size of input: 2125 DAG size of output: 15 [2021-07-14 08:35:58,471 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-14 08:35:58,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-07-14 08:35:58,474 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-14 08:35:58,475 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-14 08:35:58,476 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-14 08:35:58,476 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:3 [2021-07-14 08:35:58,490 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-14 08:35:58,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977237829] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-14 08:35:58,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-14 08:35:58,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-07-14 08:35:58,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788200178] [2021-07-14 08:35:58,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-14 08:35:58,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-14 08:35:58,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-14 08:35:58,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-07-14 08:35:58,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-07-14 08:35:58,492 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-07-14 08:35:58,492 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-14 08:35:58,493 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-07-14 08:35:58,493 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 5 states. [2021-07-14 08:35:58,493 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-07-14 08:35:58,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-14 08:35:58,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-14 08:35:58,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-14 08:35:58,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-14 08:35:58,782 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-14 08:35:58,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-14 08:35:58,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1070094057, now seen corresponding path program 3 times [2021-07-14 08:35:58,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-14 08:35:58,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351134707] [2021-07-14 08:35:58,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-14 08:35:58,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-14 08:35:59,336 WARN L205 SmtUtils]: Spent 436.00 ms on a formula simplification. DAG size of input: 2845 DAG size of output: 42 [2021-07-14 08:36:00,229 WARN L205 SmtUtils]: Spent 802.00 ms on a formula simplification. DAG size of input: 5510 DAG size of output: 25 [2021-07-14 08:36:01,093 WARN L205 SmtUtils]: Spent 789.00 ms on a formula simplification. DAG size of input: 5508 DAG size of output: 14 [2021-07-14 08:36:01,143 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-14 08:36:01,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-14 08:36:01,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351134707] [2021-07-14 08:36:01,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351134707] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-14 08:36:01,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926968085] [2021-07-14 08:36:01,144 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-07-14 08:36:01,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-14 08:36:01,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-14 08:36:01,168 WARN L261 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-14 08:36:01,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-14 08:36:02,119 WARN L205 SmtUtils]: Spent 849.00 ms on a formula simplification. DAG size of input: 2125 DAG size of output: 16 [2021-07-14 08:36:02,136 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-14 08:36:02,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 37 [2021-07-14 08:36:02,157 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-14 08:36:02,158 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-14 08:36:02,158 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-14 08:36:02,158 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:3 [2021-07-14 08:36:02,164 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-14 08:36:02,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926968085] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-14 08:36:02,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-14 08:36:02,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-14 08:36:02,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520134018] [2021-07-14 08:36:02,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-14 08:36:02,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-14 08:36:02,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-14 08:36:02,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-07-14 08:36:02,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-07-14 08:36:02,165 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-07-14 08:36:02,165 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-14 08:36:02,165 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-07-14 08:36:02,165 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 5 states. [2021-07-14 08:36:02,165 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 6 states. [2021-07-14 08:36:02,166 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-07-14 08:36:02,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-14 08:36:02,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-14 08:36:02,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-14 08:36:02,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-14 08:36:02,459 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-14 08:36:02,459 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-14 08:36:02,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-14 08:36:02,460 INFO L82 PathProgramCache]: Analyzing trace with hash 281877447, now seen corresponding path program 4 times [2021-07-14 08:36:02,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-14 08:36:02,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683806197] [2021-07-14 08:36:02,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-14 08:36:02,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-14 08:36:03,004 WARN L205 SmtUtils]: Spent 436.00 ms on a formula simplification. DAG size of input: 2844 DAG size of output: 41 [2021-07-14 08:36:03,876 WARN L205 SmtUtils]: Spent 797.00 ms on a formula simplification. DAG size of input: 5510 DAG size of output: 14 [2021-07-14 08:36:03,894 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-14 08:36:03,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-14 08:36:03,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683806197] [2021-07-14 08:36:03,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683806197] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-14 08:36:03,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132704569] [2021-07-14 08:36:03,894 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-14 08:36:03,918 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-14 08:36:03,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-14 08:36:03,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-14 08:36:03,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-14 08:36:07,436 WARN L205 SmtUtils]: Spent 3.38 s on a formula simplification. DAG size of input: 5724 DAG size of output: 48 [2021-07-14 08:36:07,494 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-14 08:36:07,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-07-14 08:36:07,521 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-14 08:36:07,522 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-14 08:36:07,522 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-14 08:36:07,522 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-07-14 08:36:07,527 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-14 08:36:07,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132704569] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-14 08:36:07,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-14 08:36:07,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-14 08:36:07,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051869596] [2021-07-14 08:36:07,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-14 08:36:07,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-14 08:36:07,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-14 08:36:07,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-07-14 08:36:07,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-07-14 08:36:07,529 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-07-14 08:36:07,529 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-14 08:36:07,529 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-07-14 08:36:07,529 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 5 states. [2021-07-14 08:36:07,529 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 6 states. [2021-07-14 08:36:07,529 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 7 states. [2021-07-14 08:36:07,529 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-07-14 08:36:07,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-14 08:36:07,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-14 08:36:07,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-14 08:36:07,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-14 08:36:07,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-14 08:36:07,847 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-07-14 08:36:07,848 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-14 08:36:07,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-14 08:36:07,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1616966313, now seen corresponding path program 5 times [2021-07-14 08:36:07,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-14 08:36:07,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993886008] [2021-07-14 08:36:07,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-14 08:36:07,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-14 08:36:07,889 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-14 08:36:07,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-14 08:36:07,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993886008] [2021-07-14 08:36:07,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993886008] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-14 08:36:07,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709023348] [2021-07-14 08:36:07,890 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-14 08:36:07,917 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-14 08:36:07,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-14 08:36:07,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-14 08:36:07,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-14 08:36:07,951 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-14 08:36:07,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709023348] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-14 08:36:07,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-14 08:36:07,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-07-14 08:36:07,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634585612] [2021-07-14 08:36:07,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-14 08:36:07,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-14 08:36:07,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-14 08:36:07,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-07-14 08:36:07,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-07-14 08:36:07,953 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-07-14 08:36:07,953 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-14 08:36:07,953 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-07-14 08:36:07,953 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 5 states. [2021-07-14 08:36:07,953 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 6 states. [2021-07-14 08:36:07,953 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 7 states. [2021-07-14 08:36:07,953 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 8 states. [2021-07-14 08:36:07,953 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-07-14 08:36:08,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-14 08:36:08,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-14 08:36:08,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-14 08:36:08,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-14 08:36:08,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-14 08:36:08,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-14 08:36:08,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-14 08:36:08,225 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-14 08:36:08,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-14 08:36:08,225 INFO L82 PathProgramCache]: Analyzing trace with hash -722101400, now seen corresponding path program 1 times [2021-07-14 08:36:08,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-14 08:36:08,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471406940] [2021-07-14 08:36:08,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-14 08:36:08,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-14 08:36:08,307 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-14 08:36:08,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-14 08:36:08,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471406940] [2021-07-14 08:36:08,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471406940] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-14 08:36:08,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957409393] [2021-07-14 08:36:08,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-14 08:36:08,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-14 08:36:08,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-14 08:36:08,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-14 08:36:36,671 WARN L205 SmtUtils]: Spent 27.82 s on a formula simplification. DAG size of input: 51297 DAG size of output: 54 [2021-07-14 08:36:36,725 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-14 08:36:36,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-07-14 08:36:36,841 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-14 08:36:36,842 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-14 08:36:36,842 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-14 08:36:36,842 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-07-14 08:36:36,847 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-14 08:36:36,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957409393] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-14 08:36:36,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-14 08:36:36,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-14 08:36:36,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515590331] [2021-07-14 08:36:36,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-14 08:36:36,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-14 08:36:36,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-14 08:36:36,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-07-14 08:36:36,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-07-14 08:36:36,849 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-07-14 08:36:36,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-14 08:36:36,850 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-07-14 08:36:36,850 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 5 states. [2021-07-14 08:36:36,850 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 6 states. [2021-07-14 08:36:36,850 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 7 states. [2021-07-14 08:36:36,850 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 8 states. [2021-07-14 08:36:36,850 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 9 states. [2021-07-14 08:36:36,850 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-07-14 08:36:37,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-14 08:36:37,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-14 08:36:37,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-14 08:36:37,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-14 08:36:37,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-14 08:36:37,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-14 08:36:37,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-14 08:36:37,239 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-07-14 08:36:37,239 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-14 08:36:37,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-14 08:36:37,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1896922678, now seen corresponding path program 2 times [2021-07-14 08:36:37,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-14 08:36:37,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515368081] [2021-07-14 08:36:37,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-14 08:36:37,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-14 08:36:38,019 WARN L205 SmtUtils]: Spent 652.00 ms on a formula simplification. DAG size of input: 5496 DAG size of output: 12 [2021-07-14 08:36:38,040 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-14 08:36:38,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-14 08:36:38,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515368081] [2021-07-14 08:36:38,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515368081] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-14 08:36:38,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177165673] [2021-07-14 08:36:38,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-14 08:36:38,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-14 08:36:38,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-14 08:36:38,067 WARN L261 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-14 08:36:38,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-14 08:36:38,469 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 1254 DAG size of output: 19 [2021-07-14 08:36:38,530 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-14 08:36:38,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-07-14 08:36:38,763 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-14 08:36:38,765 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-14 08:36:38,765 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-14 08:36:38,766 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-07-14 08:36:38,771 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-14 08:36:38,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177165673] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-14 08:36:38,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-14 08:36:38,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-14 08:36:38,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225018963] [2021-07-14 08:36:38,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-14 08:36:38,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-14 08:36:38,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-14 08:36:38,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-07-14 08:36:38,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-07-14 08:36:38,773 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-07-14 08:36:38,773 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-14 08:36:38,773 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-07-14 08:36:38,773 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 5 states. [2021-07-14 08:36:38,773 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 6 states. [2021-07-14 08:36:38,773 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 7 states. [2021-07-14 08:36:38,775 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 8 states. [2021-07-14 08:36:38,775 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 9 states. [2021-07-14 08:36:38,775 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 11 states. [2021-07-14 08:36:38,775 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-07-14 08:36:38,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-14 08:36:38,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-14 08:36:38,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-14 08:36:38,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-14 08:36:38,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-14 08:36:38,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-14 08:36:38,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-14 08:36:38,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-14 08:36:39,182 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-07-14 08:36:39,183 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-14 08:36:39,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-14 08:36:39,183 INFO L82 PathProgramCache]: Analyzing trace with hash 338323368, now seen corresponding path program 3 times [2021-07-14 08:36:39,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-14 08:36:39,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095326570] [2021-07-14 08:36:39,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-14 08:36:39,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-14 08:36:40,141 WARN L205 SmtUtils]: Spent 812.00 ms on a formula simplification. DAG size of input: 5516 DAG size of output: 13 [2021-07-14 08:36:40,174 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-14 08:36:40,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-14 08:36:40,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095326570] [2021-07-14 08:36:40,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095326570] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-14 08:36:40,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054551466] [2021-07-14 08:36:40,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-14 08:36:40,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-14 08:36:40,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-14 08:36:40,205 WARN L261 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 44 conjunts are in the unsatisfiable core [2021-07-14 08:36:40,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-14 08:36:40,665 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 1254 DAG size of output: 20 [2021-07-14 08:36:40,731 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-14 08:36:40,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 35 treesize of output 193 [2021-07-14 08:36:41,243 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-14 08:36:41,244 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-14 08:36:41,244 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-14 08:36:41,244 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:3 [2021-07-14 08:36:41,249 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-14 08:36:41,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054551466] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-14 08:36:41,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-14 08:36:41,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-07-14 08:36:41,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281314545] [2021-07-14 08:36:41,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-14 08:36:41,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-14 08:36:41,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-14 08:36:41,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-07-14 08:36:41,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-07-14 08:36:41,252 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-07-14 08:36:41,253 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-14 08:36:41,253 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-07-14 08:36:41,253 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 5 states. [2021-07-14 08:36:41,253 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 6 states. [2021-07-14 08:36:41,253 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 7 states. [2021-07-14 08:36:41,253 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 8 states. [2021-07-14 08:36:41,253 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 9 states. [2021-07-14 08:36:41,253 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 11 states. [2021-07-14 08:36:41,253 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 11 states. [2021-07-14 08:36:41,253 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-07-14 08:36:41,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-14 08:36:41,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-14 08:36:41,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-14 08:36:41,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-14 08:36:41,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-14 08:36:41,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-14 08:36:41,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-14 08:36:41,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-14 08:36:41,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-14 08:36:41,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-14 08:36:41,697 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-14 08:36:41,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-14 08:36:41,697 INFO L82 PathProgramCache]: Analyzing trace with hash 911474058, now seen corresponding path program 4 times [2021-07-14 08:36:41,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-14 08:36:41,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952724998] [2021-07-14 08:36:41,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-14 08:36:41,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-14 08:36:44,244 WARN L205 SmtUtils]: Spent 2.36 s on a formula simplification. DAG size of input: 7327 DAG size of output: 14 [2021-07-14 08:36:44,270 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-14 08:36:44,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-14 08:36:44,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952724998] [2021-07-14 08:36:44,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952724998] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-14 08:36:44,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433669836] [2021-07-14 08:36:44,270 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-14 08:36:44,295 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-14 08:36:44,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-14 08:36:44,296 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 48 conjunts are in the unsatisfiable core [2021-07-14 08:36:44,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-14 08:36:44,758 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 1254 DAG size of output: 21 [2021-07-14 08:36:44,871 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-07-14 08:36:44,871 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-14 08:36:44,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-07-14 08:36:46,603 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-14 08:36:46,604 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-14 08:36:46,604 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-14 08:36:46,604 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-07-14 08:36:46,610 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-14 08:36:46,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433669836] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-14 08:36:46,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-14 08:36:46,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-14 08:36:46,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21214540] [2021-07-14 08:36:46,612 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-14 08:36:46,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-14 08:36:46,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-14 08:36:46,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2021-07-14 08:36:46,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-07-14 08:36:46,612 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-07-14 08:36:46,613 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-14 08:36:46,613 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-07-14 08:36:46,613 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 5 states. [2021-07-14 08:36:46,613 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 6 states. [2021-07-14 08:36:46,613 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 7 states. [2021-07-14 08:36:46,613 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 8 states. [2021-07-14 08:36:46,613 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 9 states. [2021-07-14 08:36:46,613 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 11 states. [2021-07-14 08:36:46,613 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 11 states. [2021-07-14 08:36:46,613 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 13 states. [2021-07-14 08:36:46,613 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-07-14 08:36:46,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-14 08:36:46,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-14 08:36:46,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-14 08:36:46,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-14 08:36:46,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-14 08:36:46,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-14 08:36:46,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-14 08:36:46,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-14 08:36:46,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-14 08:36:46,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-14 08:36:47,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-07-14 08:36:47,081 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-14 08:36:47,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-14 08:36:47,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1499276264, now seen corresponding path program 5 times [2021-07-14 08:36:47,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-14 08:36:47,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870652060] [2021-07-14 08:36:47,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-14 08:36:47,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-14 08:36:48,032 WARN L205 SmtUtils]: Spent 808.00 ms on a formula simplification. DAG size of input: 5510 DAG size of output: 14 [2021-07-14 08:36:48,055 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-14 08:36:48,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-14 08:36:48,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870652060] [2021-07-14 08:36:48,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870652060] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-14 08:36:48,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091027112] [2021-07-14 08:36:48,055 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-14 08:36:48,084 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-14 08:36:48,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-14 08:36:48,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-07-14 08:36:48,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown